#i also have to study sql parallel to this

[flumet]

what if i don't want to understand hashmaps? what then?

[derrickcodes]

Hi, can you help me, if you have some time? I’m in college and I’m supposed to choose my specialty in like a month, but I still don’t know what do I want to do. I feel like there’s so much to learn and I don’t want to miss out on anything. Can you tell me what should I expect from working with different languages? (I’ve tried only like two so far) or do you have any tips which would help me figure it out? Please, you’d literally help save my future (dramatic, I know, sorry xD).

Sure! I understand your sentiment completely. Computer Science is such a vast field, it can feel overwhelming with how much there is to learn. I was in that same boat for the first three years of my comp sci degree and I still don’t fully know what I want to do.

The great thing about computer science is that while it is a relatively new field, it has spread its wings and has branched out in so many ways and has even affected other areas of study. Here are 10 common specializations, what they do, and what some code might look like (when possible):

Software development is what people tend to think of when studying computer science. This typically involves wanting to work in the industry as someone who develops code based on what a client or company wants. You will take courses about the software development process, such as software testing and agile development. There aren’t really any languages I would recommend, since this is such a broad field, but good places to start are C++, Java, C#, and Python. If anything, I would suggest reading further, since software development can be broken down into the other categories. An example of Java code can be seen below (and C++ and C# basically look like this as well).

Game development is another topic people think of with computer science. A lot of our generation grew up playing video games and somewhere along the line thought that they would want to develop games as well. Game developers need to have a good understanding of computer graphics (such as using OpenGL), physics, and computer programming in C++ and C#. A great place to start is looking into Unity. It’s free, it’s easy to use, and it’s what a lot of industry people use today.

Web development has been, currently is, and will always be in high demand. Most interactions people have with computers are through websites, so of course there’s a lot of companies whose development revolves around websites. The standard languages to learn are HTML, CSS, and JavaScript, although if you want an edge up, look into JavaScript libraries and frameworks, like Angular and Node.js. Also, W3Schools will be your best friend. It’s hard to show examples of this that aren’t hundreds of lines long, so here’s a little example showing HTML, CSS, and JavaScript similar to a W3Schools example.

Data science is exploding right now. The world has so much data and we’re just now beginning to analyze all of it. Say you have the history of every user that has ever been shown your ad and who clicked on it and when. Could you use that to determine anything about the effectiveness of the ad, time of day, where it’s displayed, and if they’ll click again? That’s data science. Typical courses include Statistical Computing, Data Mining, and Machine Learning. Typical languages for data science include R and Python. One subtopic that’s really big is machine learning. Can you take the data that you have and have a program “learn” off that data and make predictions about the future? Take a look at this Python code that analyzes a data set and is able to predict whether or not breast cancer is present based on a few attributes:

Information systems is the foundation of both web development and data science, as it involves how and where we store our information and data. You’ll study database management and possibly some cloud storage, since this is usually where we store things. You will want a strong understanding of data structures if you really want to learn the best ways to store things (I’ll give you a hint, databases usually use a variation of Binary Search Trees). You’ll also learn how to retrieve and manipulate the data that is stored. The languages you’ll want is SQL (rather MySQL or NoSQL) and PHP. Some MySQL code for creating a schema with tables will look like this.

Computer engineering is a close friend of computer science, but is mostly focused on the hardware side of things. Computer engineering is all about how you build the computer system. You will spend a lot of time learning the physics that goes into computer design, namely electricity and magnetism. Some classes would include Circuit Analysis, Signals, and Digital Systems, but a lot of it is up to you.

Systems & Architecture is similar to computer engineering, as you’re still focused on being close to the hardware, but you’re more interested in the software side. This was my favorite section of computer science, because you get to learn about computers from a brand new perspective and see how they work down to the electricity flowing through it. Typical courses include Computer Architecture, Operating Systems, Parallel Systems, and the like. You will learn languages like C and Assembly so you can get a good grasp of how fast and powerful a computer can be since you’re almost talking directly to it. For example, this C code is typical practice for interacting with dynamic libraries.

Theoretical computer science is a very intriguing study. Instead of learning about how all these different languages can be applied, you look into what computers are actually capable of. The main courses in any theoretical computer science section are Programming Language Theory, looking into how can you design and classify a programming language, Algorithm Analysis and Design, the different paradigms used to solve different problems, and Theory of Computation, studying what problems can be solved by computers and how quickly can they be solved. Studying this is a good way to get a job in the government, as organizations like the NSA are always looking for people to work on cryptography, which has a strong background in theory.

Scientific computing is the mix of computer science and applied mathematics. You take your understanding of programming and mathematical theory to create computer algorithms to solve problems as fast as they can (and maybe faster than ever before)! You’ll want to have a very strong understanding of linear algebra (the study of matrices), since a lot of computational tasks can be done effectively and efficiently using matrices. Typical courses include Numerical Linear Algebra, Numerical Analysis, and Partial Differential Equations. For this, languages like MATLAB (or its free counterparts Octave or Scilab), Mathematica, and even Fortran are your best bets. A typical career can involve becoming a researcher, or working for a company that relies on the most optimized mathematical code, such as a government agency or somewhere in the finance world. Here’s an example of some code written in Octave to analyze a waveform and reproduce it as a series of numbers (hey, I did a post about this earlier!)

Bioinformatics is the love child of computer science and biology. In this study, you will use what you know about computer science and programming to better understand biological data. You can use this to study the human body, such as the human genome, so we as humans can have a better understanding of what makes us human, or you can apply it and develop medical software. One of my friends got a PhD in bioinformatics and she now writes the software for heart monitors. Since this is somewhat similar to data science, you’ll want to learn Python and R.

There are more specializations, like computer security or networking, but these are the 10 I’m most familiar with. I hope this helped and feel free to reach out to me if you have any more questions!

[odohring-blog]

Previous academic work and contributions to pharmaceutical conferences

I am Orlando Dohring. This page lists previous academic work and contributions to pharmaceutical conferences. Firstly, links to those documents are provided. Then, further down, I list the abstracts for those documents. Academic work: - PhD Thesis: Identification of breed contributions in crossbred dogs

  - MPhil Thesis: Peak selection in metabolic profiles using functional data analysis

  Contributions to Statisticians in the Pharmaceutical Industry (PSI) conference: - Talk PSI 2018: Introduction to Machine Learning for Longitudinal Medical Data

- Poster PSI 2017: Big Data Meets Pharma

- Poster PSI 2016: Sparse Principal Component Analysis for clinical variable selection in longitudinal data

- PhD Thesis Abstract: Identification of breed contributions in crossbred dogs: There has been a strong public interest recently in the interrogation of canine ancestries using direct-to-consumer (DTC) genetic ancestry inference tools. Our goal is to improve the accuracy of the associated computational tools, by developing superior algorithms for identifying the breed composition of mixed breed dogs. Genetic test data has been provided by Mars Veterinary, using SNP markers. We approach this ancestry inference problem from two main directions. The first approach is optimized for datasets composed of a small number of ancestry informative markers (AIM). Firstly, we compute haplotype frequencies from purebred ancestral panels which characterize genetic variation within breeds and are utilized to predict breed compositions. Due to a large number of possible breed combinations in admixed dogs we approximately sample this search space with a Metropolis-Hastings algorithm. As proposal density we either uniformly sample new breeds for the lineage, or we bias the Markov Chain so that breeds in the lineage are more likely to be replaced by similar breeds. The second direction we explore is dominated by HMM approaches which view genotypes as realizations of latent variable sequences corresponding to breeds. In this approach an admixed canine sample is viewed as a linear combination of segments from dogs in the ancestral panel. Results were evaluated using two different performance measures. Firstly, we looked at a generalization of binary ROC-curves to multi-class classification problems. Secondly, to more accurately judge breed contribution approximations we computed the difference between expected and predicted breed contributions. Experimental results on a synthetic, admixed test dataset using AIMs showed that the MCMC approach successfully predicts breed proportions for a variety of lineage complexities. Furthermore, due to exploration in the MCMC algorithm true breed contributions are underestimated. The HMM approach performed less well which is presumably due to using less information of the dataset. - MPhil Thesis Abstract: Peak selection in metabolic profiles using functional data analysis: In this thesis we describe sparse principal component analysis (PCA) methods and apply them to the analysis of short multivariate time series in order to perform both dimensionality reduction and variable selection. We take a functional data analysis (FDA) modelling approach in which each time series is treated as a continuous smooth function of time or curve. These techniques have been applied to analyse time series data arising in the area of metabonomics. Metabonomics studies chemical processes involving small molecule metabolites in a cell. We use experimental data obtained from the COnsortium for MEtabonomic Toxicology (COMET) project which is formed by six pharmaceutical companies and Imperial College London, UK. In the COMET project repeated measurements of several metabolites over time were collected which are taken from rats subjected to different drug treatments. The aim of our study is to detect important metabolites by analysing the multivariate time series. Multivariate functional PCA is an exploratory technique to describe the observed time series. In its standard form, PCA involves linear combinations of all variables (i.e. metabolite peaks) and does not perform variable selection. In order to select a subset of important metabolites we introduce sparsity into the model. We develop a novel functional Sparse Grouped Principal Component Analysis (SGPCA) algorithm using ideas related to Least Absolute Shrinkage and Selection Operator (LASSO), a regularized regression technique, with grouped variables. This SGPCA algorithm detects a sparse linear combination of metabolites which explain a large proportion of the variance. Apart from SGPCA, we also propose two alternative approaches for metabolite selection. The first one is based on thresholding the multivariate functional PCA solution, while the second method computes the variance of each metabolite curve independently and then proceeds to these rank curves in decreasing order of importance. To the best of our knowledge, this is the first application of sparse functional PCA methods to the problem of modelling multivariate metabonomic time series data and selecting a subset of metabolite peaks. We present comprehensive experimental results using simulated data and COMET project data for different multivariate and functional PCA variants from the literature and for SGPCA. Simulation results show that that the SGPCA algorithm recovers a high proportion of truly important metabolite variables. Furthermore, in the case of SGPCA applied to the COMET dataset we identify a small number of important metabolites independently for two different treatment conditions. A comparison of selected metabolites in both treatment conditions reveals that there is an overlap of over 75 percent. - Talk PSI 2018 Abstract: Introduction to Machine Learning for Longitudinal Medical Data: In the era of big data, there has been a surge in collected biomedical data, which has provided ample challenges for distributed computing but also posed novel inference questions. Application areas range from Bioinformatics (disease diagnosis from microarray data, drug discovery from molecular compounds), medical imaging (brain reconstruction, organ segmentation, tumour detection from MRI/CT/X-Ray images), sensing (anomaly detection, human activity recognition from images, wearable devices), public health (prediction of epidemic alerts from social media data and meta-information in mobile devices) to healthcare informatics (inference regarding length of hospital stay, readmission probability within next days, mortality prediction from electronic health records). Classical machine learning techniques, such as logistic regression, neural networks, support vector machine and Gaussian processes performed very well in non-temporal prediction tasks but typically relied on the independence assumption. However, many recent application have longitudinal context in the form of short- and long-term dependencies, e.g. local spatial features in brain images, sentiment in medical reports and summaries of medical research. Hidden Markov Models proved popular to model longitudinal data but increasingly become less computationally feasible for a large number of hidden states. Recently, advances in parallel computing led to widespread use of deep learning approaches, such as recurrent neural networks and convolutional networks, and attracted attention due to their impressive results on sequence data. Finally, we will look in more detail at a case study from healthcare analytics which infers disease type from multiple irregularly sampled longitudinal observations, such as blood pressure, heart rate and blood oxygen saturation. - Poster PSI 2017 Abstract: Big Data Meets Pharma: In this work we present a tutorial introduction to show how SAS can be leveraged for large datasets in the pharmaceutical sector: Big data plays an increasingly important role within drug compound discovery, genomic data analysis in clinical trials and real-time streaming data from wearable devices or sensors which monitor patients’ health and treatment compliance. SAS adopted Hadoop as highly scalable data platform for data warehouse operations, descriptive statistics and statistical analysis with a bias towards machine learning approaches. However, Hadoop’ MapReduce framework is slow and batch-oriented which is not very suitable for iterative, multi-step parallel algorithms with a focus on in-memory computations. To address these limitations SAS added layers for in-memory computation, interactive data queries using a SQL variant, support for streaming analytics and predictive models implemented in SAS Visual Statistics/ Analytics. In the data science sector, the similar open-source Apache Spark project with its machine learning library MLlib is commonly used. Both Visual Statistics and MLlib have implementations for linear/logistic regression, decision-tree based classifiers, and clustering. Furthermore, SAS focusses on group-by processing and GLMs while MLlib has methods for feature extraction, dimensionality reduction, SVM classifiers, matrix completion and basic hypothesis tests. At the moment the SAS Hadoop implementation is a good selection for data management and dataset derivations which often can be parallelized. However, currently there is lack of procedures typically in pharmaceutical statistics, such as mixed effect models for repeated measurements analysis or survival analysis models. - Poster PSI 2016 Abstract: Sparse Principal Component Analysis for clinical variable selection in longitudinal data: Background: Data collection is a time-consuming and expensive process. To minimise costs and reduce time, statistical methods can be applied to determine which variables are required for a clinical trial. Principal component analysis (PCA) is a popular exploratory technique to select a subset of variables at one timepoint. For multiple timepoints, typically each variables’ measurements are aggregated, which ignores temporal relationships. An alternative method is Sparse Grouped Principal Component Analysis (SGPCA), which also incorporates the temporal relationship of each variable.  SGPCA is based on ideas related to Least Absolute Shrinkage and Selection Operator (LASSO), a regularised regression technique, with grouped variables. SGPCA selects a sparse linear combination of temporal variables where each patient is represented as short multivariate time series which are modelled as a continuous smooth function of time using functional data analysis (FDA). Aim: Compare the ability of the PCA and SGPCA to identify required variables for clinical trials. Methods PCA and SGPCA will be applied to a longitudinal clinical dataset to select required variables.  We will compare the required variables, and the amount of variability retained for each technique under the SGPCA model. Conclusion This research will provide awareness of techniques to identify required variables in clinical trials, and aims to demonstrate the potential benefit of incorporating the temporal relationships in variable selection.

[nisa7trainings]

Teradata Training

Nisa online training Institute offers the best online Teradata training by well-trained and certified trainers. In the first place, Teradata is the largest provider of powerful, enterprise big data analytics and services, including Data warehousing, Data-Driven Marketing, BI and CRM. In addition, Teradata is an open program that operates on a UNIX MP-RAS or Windows server platform. However, Teradata is capable of serving a variety of concurrent users from various application systems. We are proud to be one of the leading global IT Online training providers with the most qualified and experienced IT experts and skilled resources. We have given training to Consultants, Corporations, and Working Professionals to handle all the challenges of their respective technological advances.

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[iexcelerp-blog]

Can Salesforce Keep Growing? Five Possibilities for Marc Benioff

Editor’s note: This article was contributed to Cloud Wars by Jiri Kram, a solution architect who studied Fintech at MIT and specializes in cloud computing and blockchain. He is a highly respected commentator on LinkedIn, where he originally published this piece on May 6. This article marks Jiri’s third appearance on Cloud Wars; you can see his first two Cloud Wars articles here and here. While Jiri is a good friend of Cloud Wars, the views expressed are his, and do not necessarily reflect the views of Cloud Wars. In particular, I think there is almost no chance that Jiri’s idea of Keith Block returning to Oracle or going to Microsoft will come to pass, and I think there’s an equally tiny likelihood for Jiri’s idea that Thomas Kurian will have Google Cloud develop a database designed to compete with Oracle’s. But multiple views make for interesting debates, so with those qualifiers made, we invite you to enjoy this latest set of provocative ideas from Jiri Kram. Can Salesforce keep growing despite the crisis? That’s a billion-dollar question. And it doesn’t have a straightforward answer. Salesforce has enjoyed so far 35% growth, and the future looks rosy. Can this trend sustain in an environment when IaaS is outgrowing any other cloud category? And how do the Cloud Wars between AWS / Microsoft / Google / Oracle affect Salesforce? Let’s dive in and see what challenges and strategic options Marc Benioff is facing. Will Salesforce say sayonara to Oracle? In 3 years, it will be exactly ten years after Salesforce signed a deal with Oracle. Ever since then, there were various attempts to test if Salesforce can run without Oracle database foundation. These attempts led in creation and acquisition of many new services Einstein, MuleSoft, Commerce Cloud, Marketing Cloud, Pardot, Quip, Heroku that wasn’t built on top of Oracle. Thus, creating a situation when 50% of Salesforce (Sales Cloud, Service Cloud, Force Platform) runs still use Oracle database and java, while the rest use mix of AWS and Azure. The only question is if Salesforce will manage to migrate schema to other databases. Let’s explore Salesforce’s options Stay on Oracle and migrate to Oracle Autonomous Database Migrate Oracle databases to AWS RDS for Oracle Migrate Oracle databases to AWS Aurora or AWS Postgres Create a hybrid deployment use AWS RDS for Oracle for some workloads and move to AWS Aurora, DynamoDB or Postgres Deal with Thomas Kurian 1. Staying on Oracle and migrate to Oracle Autonomous Database This option is possible, due to Keith Block’s departure from Salesforce. If Oracle hires Mr. Block, he would be able to close the deal with Marc Benioff for extending or expanding the Oracle contract. Although it may sound to many unrealistic, technically, this option is the lowest risk for Salesforce. Problem with Oracle database foundation of Salesforce is a simple fact. Beyond core products like Sales Cloud, Service Cloud and Force Platform, there is also AppExchange that contains around 3,500 applications from many vendors. Given all these applications uses in some way shape or form Oracle technologies (schema = objects, fields; security model = profiles, roles, permission sets, OWD; logic = apex / oracle application express; UI = visualforce / oracle JSP). Migrating all of those to some other platform might be very risky, so if Keith Block ends up at Oracle, then it is likely he would attempt this deal.

2. Migrate Oracle databases to AWS RDS for Oracle  This option is also very tempting because Salesforce already has experience with this setting. For example, the Canadian data centre is running on AWS and therefore, it’s likely that Salesforce would be able to deliver Oracle-based schema they are using AWS RDS (Relational Databases Service) for Oracle. Given that AWS now supports all versions of Oracle database including 19c, which was the last version before starts delivering Autonomous Database, RDS should be sufficient for Salesforce purpose. Why? Salesforce licensing deal with Oracle signed in 2012 contained ten years deal but without Oracle Autonomous Database, which didn’t exist by then. AWS RDS now supports all major version 11g, 12c, 18c and 19c so it’s possible this could be sufficient for Salesforce. It’s also relatively safe move, as there is no major change, the primary impact is data centre is operated by AWS and not by Salesforce team, so all maintenance like patching, upgrading, scaling and so of the database wouldn’t need to be done by Salesforce team. This could both reduce Salesforce’s operating cost and help them innovate faster because they would benefit from any development on the AWS side.

3. Migrate Oracle databases to AWS Aurora or AWS Postgres Similar to the previous scenario, here Salesforce would be using AWS RDS but instead running licensed Oracle databases. They would start using either AWS own relational database Aurora or Postgres, which Salesforce already uses in Heroku. My guess is that Salesforce is more likely to use Aurora, because Amazon uses this relational database themselves for the most challenging workloads, which previously ran on Oracle. Aurora, unlike using RDS with Oracle, would also come with the benefit of single cost per database. In case Salesforce would be using RDS for Oracle, here cost of such infrastructure would also be influenced by license cost from Oracle. If Oracle would increase maintenance or any other fees for running Oracle outside of Oracle approved infrastructure (see “Oracle license audit”), you can quickly see that running Oracle on AWS might come with some challenges to consider. So if Salesforce’s Oracle workloads would be migrated to AWS Aurora, then Salesforce would gain an advantage in controlling the cost of the database. If this is done successfully, Salesforce would be able to reduce own cost while price same and thus increasing margin and attractiveness for investors. The only problem is the migration of AppExchange. It’s possible to imagine the migration of core Oracle-based services like Sales Cloud and Service Cloud. But the migration of Force Platform, which has many millions of apps build on top of it and is bundled to commercial offers via AppExchange, might not be so smooth.

4. Create a hybrid deployment use AWS RDS for Oracle for some workloads and move to AWS Aurora, DynamoDB or Postgres  I believe that the Salesforce engineering team will opt for this. The reason is straightforward. Unlike the big bang approach (e.g. let’s take everything and migrate to Aurora), in this scenario, moving off Oracle is phased. Salesforce would likely split migration as follows: 1) workloads that require a relational database, 2) workloads that can use NoSQL database, 3) workloads that are currently in a relational database but doesn’t need to database. Then they would differentiate further: 1) workloads that require a relational database but are using capabilities that can be recreated in Aurora, 2) workloads that are bind to other Oracle technologies and that are not easy to replicate in Aurora. After that hybrid deployment would be stood up; 1) Oracle workloads are first migrated to AWS RDS for Oracle, 2) After that some Oracle workloads are migrated to Aurora some stay on Oracle, 3) Workloads migrated to Aurora are tested and if there is no technical issue, it will start to run in parallel, means APIs will be slowly transition from Oracle RDS to Aurora, 4) If transition to Aurora is successful, RDS Oracle instances will be stopped and kept as backup, 5) Meanwhile workloads that could be converted to NoSQL will be switched to DynamoDB and run in parallel with those in RDS, 6) When conversation is successful DynamoDB will be replacing in selected API connectivity to previous RDS, 7) When transition from RDS to Dynamo is completed then RDS is stopped and kept as backup, 8) Some feature programmed in Java and PL SQL as workarounds on older versions of Oracle database could be developed externally for example using AWS Lambda functions, 9) Same as with RDS new Lambda functions replacing previous code for Oracle will be tested and run in parallel with Oracle, 10) After its clear Lambda functions can replace custom development done in Java for Oracle, then Lambda will start to replace Oracle in APIs, ultimately replacing it. Yes, this will be a long and complicated journey, but many other AWS customers did it, and so it’s technically possible. Once again, however, the main problem is the logistics around AppExchange as the transition from Oracle to AWS can’t impact a running application. Imagine the scenario when Vlocity, Veeva, Apttus, FinancialForce, nCino, ServiceMax and other ISV applications would have any piece of code pointing to Oracle and thus leading to stop instances.

5. Deal with Thomas Kurian This option is improbable, but it’s not impossible. Thomas Kurian came from Oracle, and his primary goal is to replace Oracle. To do this, he will have to beat Oracle at its own game – database. Google currently doesn’t have a database that could be equal to Oracle or AWS Aurora. So it’s likely Kurian will develop a brand new database with his strategic hires from Oracle and will challenge Larry Ellison in the market. Having Salesforce as a reference would be not just a big boost for Google capabilities, but also a highly strategic message. Kurian would steal the most critical SaaS application in the world running on Oracle. And of course, Google sales are full of ex-Oracle people that would use this to visit every single strategic Oracle client and offer them alternative to both AWS Aurora and Oracle. Thomas Kurian is brilliant, and he loves winning. Challenging Larry in his own game could be too tempting for Thomas not to think about. For Google, there might also be another thing in play: many top Salesforce dealmakers were hired by Google, and so there is a direct link between both companies. Besides, Google can buy Salesforce in case they would feel Amazon would consider it. And, let’s not forget Keith Block can join any of players mention above Oracle (to make a deal with Salesforce), AWS (to make a deal with Salesforce to fight Oracle) or Google (to help Thomas Kurian making a deal with Salesforce to challenge AWS and Oracle). One more thing… Some say Keith Block could join Microsoft and, thus, would be the one controlling Salesforce on infrastructure level could be Azure. Impossible? Do you remember Marketing Cloud already runs on Azure? Back to you, Marc and Keith. RECOMMENDED READING Jiri’s first Cloud Wars article: To Combat COVID-19, a Retail App Becomes a ‘Smart Quarantine’ Solution Jiri’s second Cloud wars article: The 10 Most-Valuable Industries in the Wake of COVID-19 Can Larry Ellison Turn Zoom & Autonomous DB into Big-Time Oracle Cloud Revenue? Q1 Cloud Revenue Roundup: Microsoft, AWS and Google Total $26.3 Billion How Bill McDermott’s Magic Touch Has Made ServiceNow a Cloud Superstar Microsoft CEO Satya Nadella: 10 Thoughts on the Post-COVID-19 World Microsoft & Amazon Lead Top 5 Beyond $150 Billion in Cloud Revenue in 2020 Google Outpaces Microsoft, Amazon in Cloud-Revenue Growth at 52% Zoom Picks Oracle for Cloud Infrastructure; Larry Ellison’s First YouTube Video Subscribe to the Cloud Wars Newsletter for in-depth analysis of the major cloud vendors from the perspective of business customers. It’s free, it’s exclusive and it’s great! The post Can Salesforce Keep Growing? Five Possibilities for Marc Benioff appeared first on . https://cloudwars.co/salesforce/can-salesforce-keep-growing-five-possibilities-marc-benioff/ -- Link of source Read the full article

[evanvanness]

Annotated edition, Week in Ethereum News, April 19 issue

Here’s the most clicked for the week:

As I always say, the most clicked is determined by what people hadn’t already seen during the week.  

My thought is that the annotated edition tries to give people a more high-level overview.  If I were only reading a few things this week, I would read

Quarterly update from each EF team

Prysmatic launches the Topaz testnet, ready for multi-client testnet

Compound’s decentralized governance launches

Why so many South Americans are into DeFi: “when you believe and know in your heart that nothing is riskier than your government or a bank, any alternative becomes much more enticing”

7 reasons Eth2 will change the blockchain game

The quarterly update from each EF team is pretty down in the weeds, but some of those teams don’t do much communicating. They don’t have the same need to communicate as EF pays salaries, plus some of teams are low-level stuff where the audience is already quite small.  It’s at least worth skimming to get a general idea of what the EF teams are doing though.

Prysmatic launched their new testnet, which isn’t the multi-client testnet™ but is very close.   We should see that in the next few weeks.  The “7 reasons Eth2 changes the game” is certainly an Eth bullish post, but I suspect that the “eth2 skepticism trade” is going to start unwinding and it could have a big impact on the price of ETH.  In fact, I think the price of ETH would likely be higher right now if Eth2 didn’t exist, because crypto fund managers have all turned eth2 into “just a meme” and sold on skepticism.  Meanwhile literally zero Eth wannabes have yet to deliver anything scalable without trading off decentralization - and if you trade off decentralization, then you may as well just use SQL.

I suspect Compound’s governance will prove to be something that many projects copy.  Of course they didn’t come up with it all on their own, they certainly incorporated many elements from others (eg, Maker) but it’s a solid model for web3 apps to follow.

Finally Mariano Conti’s essay on why DeFi.   Contrary to Bitcoin’s “tHe DoLlAr iS aBoUt tO coLaPsE,” DeFi provides an alternative financial system to the folks whose fiat is actually on the verge of collapsing and who don’t want to hold volatile assets like ETH (or an unsustainable memecoin like BTC).  Of course it’s not perfect, and it’s risky but any Argentine has a pretty good sense that DeFi is less risky than their banking system or Argentina’s Peronist Peso Printer.  

That thing goes brrrrrrrrrrrrrr like no other.

Eth1

Geth v1.9.13, with dynamic state snapshots if you use the flag

Nethermind v.1.8.1 – receipts, bodies and state can be synced in parallel. WebSockets and HTTP run on same port

Latest core devs call. Beiko’s notes. Progress and discussion on EIPs for Berlin.

Quilt doc on account abstraction implementation plan

Most of this speaks for itself.  The clients continue to improve while things are being worked on for the next hard fork.  Meanwhile the longer-term stateless Ethereum continues to be worked on.

Eth2

Prysmatic launches the Topaz testnet, ready for multi-client testnet

Chainsafe’s Lodestar client in TypeScript releases initial audit report from Least Authority

Latest what’s new in Eth2

Latest eth2 call, lots of talk of API standardizations. Ben’s notes

Proto’s eth2fastspec, an optimization for transition speed to the spec

An update to add atomicity to cross-shard transfers at EE level

The Lodestar tooling has already proven to be really useful to devs and the code quality is quite high by all accounts.

Ben’s what’s new in eth2 is also a good high-level read, I just assume you already know that.

Layer2

When DeFi meets rollup, how rollup chains will work together

Arguably this could be in the “things you should read this week” above, as it’s a relatively high-level look at how rollups will work together, using Eth as the settlement layer. 

Stuff for developers

Writing your first zk proof with circom and snarkjs from Iden3

Brownie v1.7 – (python-based dev/testing framework). easy CLI github/EthPM package install. And a quick walkthrough of using OpenZeppelin contracts with Brownie

Remix online and desktop IDE v0.10 – more e2e tests, dev node in browser, plugin improvements, publish to IPFS, async/await for script execution

OpenZeppelin test environment v0.1.4

dshackle – Eth API load balancer

Flash mintable asset backed tokens

Upload to IPFS directly from ENS manager with Temporal

How MeTokens personalizes with 3Box Profiles

Loopring launches an API for their dex rollup

Patterns for access control in Solidity

money-legos: tool to build DeFi apps

I’ve been trying to provide more context in the links of the devs section, which means I have less to say here.   

That money-legos quickstarter for DeFi apps seems like it’s built for hackthons.

Security and ERC777 attacks

Sebastian Bürgel finds a bug cancelling the transaction in the Multis UI

Certora on a Synthetix reentrancy bug they found

Slither v0.6.11 – support for Solidity v0.6, auto-generate properties for unit tests and fuzzer

Curve found a vulnerability in the Curve sUSD code. Funds are safe.

Two ERC777 re-entrancy attacks this weekend. ERC777 is widely known to be vulnerable to reentrancy attacks, something ConsenSys Diligence highlighted in the Uniswap audit and on which OpenZepplin published an exploit on last summer

Thus a Uniswap market for imBTC (ERC777) got drained for ~1300 ETH with reentrancy and then lendFme also got drained for $25m USD by the attacker tricking the code into believing more had been deposited than actually had. Peckshield has a solid writeup. The losers are the liquidity providers, and dForce which had the entirety of its liquidity drained.

The dforce/lendfme attacker ended up giving back the money, apparently because he (i’ll use masculine probabalistically) used some front ends without covering his tracks, so he decided it was better to quit while still ahead.

ERC20 has some problems as a token standard, but auditors are generally quite skeptical of ERC777.  Could we see a better standard someday? We certainly could, but it seems unlikely to be 777.

Ecosystem

Quarterly update from each EF team

What is still lacking to replace WeChat with web3?

Transaction fees > uncle rewards for miners in March 2020. Obviously Black Thursday’s transaction fee spike contributed to this

Replacing all the different components to make a web3 WeChat is hard.  Even stuff like pictures is quite complicated.

Enterprise

EY releases OpsChain, v4, new SaaS model for public/private chains

Study of key management systems for enterprise

How the Baseline Protocol synchronizes between different systems of record

Using Baseline Protocol for medical tests

John Wolpert’s “mainnet as middleware” for a way of synchronizing different databases.   It’s not quite “global settlement layer” but it basically is settlement but without the finance aspect. 

Governance, DAOs, and standards

Compound’s decentralized governance launches

EIP2585: Minimal Native Meta Transaction Forwarder

Austin Williams mentions this 2002 Microsoft Research paper on Sybil resistance

Sybil resistance is quite hard, as we’ve found out with some Gitocin grants issues.  I don’t think anyone is surprised by the issues, it’s obviously not a 100% onchain trustless system yet.

Application layer

A guide to the shutdown of Maker’s SAI

Play short-deck hold’em with Phil Ivey is the new VirtuePoker promo

Ox opens the waitlist for Matcha, a “better way to swap tokens”

First RocketDAO loan using an ENS name as collateral

DeFi Saver’s vault protection product Automation v2 with flash loans and Maker’s next price

How MetaCoin is thinking about Nikolai’s Reflex Bonds idea for a stablecoin without pegs

dYdX crosses 1billion USD in originated loans

AtStake, an Eth-based competitor to OpenBazaar. Also: help test OpenBazaar with Eth

A writeup of PieDAO’s managed Balancer pools

AtomicLoans lets you lock up BTC for a Dai/USDC loan. (Get ~9% by lending your Dai/USDC)

Gnosis launches a dex protocol with ring trades in batch auctions every 5 mins. First app on the protocol is dxDAO’s Mesa, available through mesa.eth

Do dexes count as DeFi?  I’ll count them as a yes for my weekly metric, which - now that I’ve counted - is at 9/11.  

I didn’t count VirtuePoker as DeFi but I’ve seen some persuasive arguments that gambling has often historically served as a (rather inefficient) method of capital formation. 

It’s also interesting to see dexes evolve.  Exchange is so fundamental to web3 that I think it’s quite possible that we see a segmented market in the long-term, despite the fact that liquidity is a great barrier to entry.  There are simply niches that can be best served by certain tradeoffs, and Gnosis’s batched auction ring trades is an interesting look.

Tokens/Business/Regulation

Another flippening: value transfer on Ethereum exceeds Bitcoin

7 reasons Eth2 will change the blockchain game

Swiss Financial Stability Board recommends heavy stablecoin regulation in response to G20 call for stablecoin comments

Coindesk reports that China’s Blockchain Service Network will incorporate Ethereum

Canada’s regulatory guidance for crypto exchanges

Bullionix: mint gold coin NFTs using DGX

HashCash v2 – personal token spam protection with auto-decreasing bond

me tokens, synthetic labor personal tokens on a bonding curve integrated with Moloch/Aragon from Chris Robison. Unfortunately I can’t read the blog post because Medium censored it.

DeFi Market Cap, neat way to compare what pools are popular inside of DeFi

Virtual gold coins is a pretty interesting bundle.  

Also cool to see some folks experimenting with personal tokens.  Until 2017 got out of control, the hope was to see more experiments (and no scams, ahem!) at small scale, rather than “here’s $100m in ETH, now it’s 1 billion in ETH....now you’re panic selling the bottom.”   Capital allocation in decentralized ecosystems has not been great.

General

MyCrypto and PhishFort get 49 malicious Chrome extensions removed

Etherscan’s ETHProtect, taint inference analysis

Shapeshift buys Portis, and will rebrand it as Shapeshift

Binance is planning a centralized (DPoS) EVM chain

SheFi, a DeFi education program aimed at women

Why so many South Americans are into DeFi: “when you believe and know in your heart that nothing is riskier than your government or a bank, any alternative becomes much more enticing”

The Eth logo made of Venezuelan bolivars

The Eth logo was made up of 3.71 million bolivars, so 0.16 ETH, or under $30 USD.  A sad commentary for a country that briefly had the same standard of living as the United States just a couple decades before I was born.  

Ultimately it is hard to retain the fruits of your labor if poor public policy choices are made by voters, and none was worse than electing an authoritarian dictator.

Finally, you might notice that below I added the sponsor and calendar section to the annotated edition for the first time.  

This newsletter is made possible by ConsenSys

I own 100% Week In Ethereum News. Editorial control has always been me.

If you’re wondering “why didn’t my post make it into Week in Ethereum News,” then here’s a hint: don’t email me. Do put it on Reddit.

Dates of Note

Upcoming dates of note (new/changes in bold):

Apr 21-23 – EY Global Blockchain Virtual Summit

Apr 24 – EthGlobal’s HackMoney virtual hackathon starts

Apr 24-26 – EthTurin

Apr 29-30 – SoliditySummit (Berlin)

May 8-9 – Ethereal Summit (NYC)

May 22-31 – Ethereum Madrid public health virtual hackathon

June 17 – EthBarcelona R&D workshop

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Week 6 Evening Lecture

Extended seminar - Web

HTTP - requests and response (html payload)  HTML - response packet Javascript - script tags are embedded Database/SQL - used for querying database eg. browser sends an HTTP POST  request to the server with the username and password... HTTP Cookies/ Sessions - once logged in the server will generate a session cookie ID that's unique for the user Session hijacking - steal someone's cookie and put in your web browser to gain access to that person’s account

XSS  Cross-site scripting - an attack in which an attacker injects data, such as malicious script into content from websites.

What you can do? Can steal cookies and modify elements. Inject memes into pages, steal pages

Google got hit by XSS  There are 2 types of XSS stored CSS and reflected XSS.

Stored CSS (a.k.a non-persistent XSS) -  you enter data which is stored in the app and in response to another request it will be returned. The data contains JS code. 

https://blog.sqreen.com/reflected-xss/ 

Reflected XSS (or also called a non-persistent XSS attack)   -  malicious script bounces off of another website to the victim’s browser. It is passed in the query, typically, in the URL. It makes exploitation as easy as tricking a user to click on a link. 

<img src = 'x' onerror.... SQL Injections The website uses HTML, tells your web browser how to display information

An SQL injection is inserting SQL statements in the user input, to be executed. An example is SELECT … OR 1=1 –

The dash ‘-’ at the end is to comment out the rest of the code. What to input into login form?  'or 1=1 -

Blind SQL Injection word; ls # It is a type of SQL attack that queries the database via true or false questions. The responses will be based on the application. 

Command Injection

Command injection is an attack where arbitrary commands are executed on the host operating system via a vulnerable application. 

Cross-Site Request Forgery This is an attack on an authenticated user i.e. they are logged in on a website somewhere AN eg I log in to a banking site and want to transfer some money Send a request to the server in the appropriate form this is sent with my cookie to the bank  A website will automatically request a <img> with ... Got distracted and clicked on a dodgy website If an attacker knows the format of the bank request, they can hide

Cross-Site Request Forgery Defences Primary mitigation is with tokens Generate a suitably random toke, store value server-side Send token to the user, expect this token as part of any user request In a GET request, this token will be part of the URL The website expects something like this as the correct request Important: If a website has XSS vulnerabilities, CSRF mitigations are pointless! Could be used to obtain generated token and use it

Extended seminar - Cryptocurrency

Payment process: Current versus Bitcoin Current payment systems require third-party intermediaries that often charge high processing fees...

Built using cryptographic principles Difficult to fake transactions Not controlled by a central authority

Blockchain It is a method of storing data A chain of chronologically linked blocks, each block is linked to the previous Blocks contain: data, hash, hash of previous No 2 blocks will have the same hash meaning each block have a unique hash

Data Consists of hundreds of transactions

Hashes The block's hash summarises the data into a combination of letters and numbers Sha-256 hashing algorithm IF a transaction in the block is changed, the hash will change E.g. Alice now changes the amount to $ 50

1. When a transaction is made, it isn't immediately added. It is placed

We hash the block header along with an extra number, the nonce When we hash, we hope the block hash value is below a certain target value A nonce is a random number...

Proof of stake Growth of mining pools could eventually lead back to a centralised system

PoW mining uses excessive amounts of electricity PoS algorithm attributes mining power to proportion of total bitcoins held(plus other various factors) rather than computing power Rewards are transaction fees rather than new cryptocurrency

Types of cryptocurrency:

Bitcoin Most popular Uses SHA-256 hashing algorithm Very processor-intensive and complex

Litecoin Uses Scrypt hashing algorithm 4 times faster than SHA-256 But much more memory intensive

Facebook Libra Centralised architecture - Libra will be managed by the Libra Association, having more control over the blockchain, but can we trust Facebook?

Why so many cryptocurrencies Different interpretations and implementations of blockchain technology ICO boom

Privacy Blockchain doesn't have a strong concept of 'identity' - uses (public, private) key pairings

Doesn't exempt transactions from tracing Two main ways: Relations between addresses - 'Inferring' identity Interactions between nodes & users

Case Study - Monero Unlinkability _> "stealth addresses' with 'view' keys Transaction mixing -> Ring signatures COncealing transaction amounts ->RingCT signatures Hiding source IP and blockchain usage -> The Kovri Project

MtGox user database began circulating online - plain text email addresses - Usernames - MD5 HAshed passwords - unsalted

Future of Cryptocurrency

Adoption - overcoming resistance from people, established financial institutions, governments, ease of use, volatility

Threats - Quantum computers means faster hashes

Hw Find a string whose SHA-256 hash starts with "6841" (in base 16)

Hint: use a loop and brute force it (don't try to reverse the hashing algorithm)

How much longer would it take to find a string whose hash starts with "68416841"?

HW Read up 'Block Modes" - only need to learn/understand ECB CBC, CTR

Mission impossible red box - is in the exam?

Authentication

Can not fake your fingerprints, the way you walk, face

Richard Buckland’s Lecture

Symmetric cipher - encryption and decryption keys are the same

https://searchsecurity.techtarget.com/definition/asymmetric-cryptography

Asymmetric (a.k.a public-key cryptography) - uses public and private keys to encrypt and decrypt data. The public is for encryption and the private key is for decryption.

90 million dollars taken by an impersonator with a silicone mask. How can you know its really him?

Identification vs authentication

Identification - claiming you are somebody

Authentication - proving that you are who you say you are

How can a computer make a decision about whether a person is the person they claim who they are? 

Preloaded data - photographs, but people may look similar.

People - can identify by shared experiences, but computers cannot be taught this.

Factors

It’s easy to show you know a password, but it’s hard to show that no-one else does.

Something you know Passwords, PINs (personal identification number). These are very common and very easy to crack.

Something you have Smart cards are used with a pin to provide multi-factor authentication

Something you are Fingerprint

TYPE 1 AND TYPE 2 ERRORS:

type 1 - system rejects a known user

type 2 - system accepts an unknown user

Block Cipher Modes

Electronic Code Block

https://searchsecurity.techtarget.com/definition/Electronic-Code-Book

Same plaintext = same ciphertext value. Electronic Code Book is used when a volume of plaintext is separated into several blocks of data, each of which is then encrypted independently of other blocks. It has the ability to support a separate encryption key for each block type. Though, each block can be encrypted in parallel to reduce encryption time.

Cipher Block Chaing

This uses an Initialisation Vector (IV) of a certain length.  Each plaintext block is XOR’d with the immediately previous ciphertext block, then passed to the encryption function to be encrypted. This does not have the ability to encrypt blocks in parallel and it is more resistant to cryptanalysis.

Counter Mode

A counter initiated value is encrypted, then XOR’d with the plaintext. This can be done in parallel since each block is independent.

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Migrating from SAP ASE to Amazon Aurora PostgreSQL

Enterprise customers often have legacy applications running on an older variant of databases, which impedes the applications’ scalability. In this high-speed cloud computing world, businesses are anxiously looking for solutions to migrate these databases to the cloud. Amazon Aurora is a highly available and managed relational database service with automatic scaling and high-performance features. The combination of PostgreSQL compatibility with Aurora enterprise database capabilities provides an ideal target for commercial database migrations. In this post, we cover the best practices to migrate an on-premises SAP ASE (Sybase) database to an Aurora PostgreSQL database using AWS Schema Conversion Tool (AWS SCT) and AWS Database Migration Service (AWS DMS). We discuss the multiple phases involved in a migration: Preparation and assessment Migration Cutover procedures As of this writing, AWS SCT only supports Sybase version 15.7 and 16.0. AWS DMS only supports version 12.5.3 and higher. For the latest product supported versions on Sybase, see What Is the AWS Schema Conversion Tool? and Using an SAP ASE database as a source for AWS DMS. You should also know the product limitations when Sybase is the source and the limitations for PostgresSQL as the target. Preparing and assessing on the source database Preparation and assessment is the initial phase. Before we start moving data, we need to monitor and analyze the source database schema for the data lifecycle. To provide the best migration solution, you need to have a better understanding on the workload, data access patterns, and data dependencies. In this post, we discuss the following areas: Character set Entity relationships Largest table size Unused tables and indexes Largest LOB size Integration with other databases or OS Prerequisites To complete this step, you need the following: A SQL client tool (for this post, we use SQL Developer) An entitity relationship (ER) tool to retrieve the ER A Sybase user with admin privileges to query the system tables. The user must have following roles: sa_role replication_role sybase_ts_role If you rely on AWS DMS to enable Sybase replication on table (which is mandatory), you need to grant permissions to run the stored procedure sp_setreptable. Alternatively, set the extra connect attribute enableReplication=false, which means you have to manually enable sp_retreptable on the table to migrate ongoing replication changes. Character set To find out the default character set and sort order for your SAP ASE database, enter the following query: exec sp_default_charset Note: If your application uses a different charcter set, you can find it from your session via the checking global variable @@client_csname or @@client_csid. PostgreSQL supports various character sets, from single byte to multiple bytes. When you create a new Aurora PostgreSQL database, the default character set is UTF8. PostgreSQL also supports automatic character set conversion for certain character set combinations. In our testing environment, we used AWS DMS to migrate an SAP ASE 12.5 database with character set ISO8859 to Aurora PostgreSQL ISO8559 with no conversion issue. If you have a non-default character set that you want to migrate, you have to use an extra connect attribute to specify the character set being used by the source database. For example, if a customer’s default character set is UTF8, they have to specify charset=utf8 as an extra connect attribute to correctly migrate the data. Entity relationship If possible, reverse engineer your data model using an ER tool (such as Erwin). The ER diagram gives you a clear picture of the relationships between your database objects. When you set up an AWS DMS task, you need to migrate the dependent tables together to ensure transactional consistency. Largest table size Study your largest and busiest tables to find out their sizes and rate of change. This gives you an accurate estimate of where time will be spent when you do the initial data migration using the AWS DMS full load feature. You can try to parallelize the load on the table level with one task to save time. The SAP ASE server only allows one replication thread for each database, so you can only start one AWS DMS task at one time for each database. You can’t run multiple tasks, which is common when migrating other database engines. For more information, see Limitations on using SAP ASE as a source for AWS DMS. For version 15 and later, you need to query sysobjects to list the top 10 in row count and space used. See the following code: select top 10 convert(varchar(30),o.name) AS table_name, row_count(db_id(), o.id) AS row_count, data_pages(db_id(), o.id, 0) AS pages, data_pages(db_id(), o.id, 0) * (@@maxpagesize/1024) AS kbs from sysobjects o where type = 'U' order by kbs DESC, table_name ASC We need to identify tables with the TEXT, UNITEXT and IMAGE data type, because AWS DMS converts these objects to LOB. It’s always recommended to identify the size of LOB columns and choose LOB settings (limited or full mode) and max LOB size appropriately. See the following code: Select o.name as table_name, c.name as column_name, c.type as data_type_code from sysobjects o join syscolumns c on o.id=c.id where o.type=’U’ and c.type in (34,35,174) For older versions, query sysindexes: select top 10 object_name(id) as "name", rowcnt(doampg) as "rowcount" from sysindexes order by rowcnt(doampg) desc select top 10 object_name(id) as "name", maxlen as "row width" from sysindexes order by maxlen desc Unused tables and indexes You first need to set up auditing on your Sybase server. You need to install a security database, restart the server, and enable auditing. You use the sp_audit procedure to audit all the tables and indexes for select, insert, update, and delete for a data cycle of 3–30 days, depending on your application usage pattern. If you want to migrate tables that haven’t been accessed in the last 30 days, it should be fine to also include those. See the following code: sp_audit "insert", "all", "yourtablename", "on" sp_audit "select", "all", "yourtablename", "on" Largest LOB size LOB typically takes the longest to migrate, unlike data types such as number and character, due to time spent encoding, storing, decoding, and retrieving them. You can use the following dynamic SQL to generate a query for each table: select 'select max(datalength(',c.name, ')) from dbo.', o.name,';' from sysobjects o, syscolumns c where o.type = 'U' and o.id = c.id and c.type in (34,35,174); After running the preceding queries, compare the results and pick the top one. For example, we found the largest LOB column in our SAP ASE database is 119 KB. We used this number as input in our task settings with limited LOB mode. The speed of the full load is greatly improved with limited LOB mode compared to full LOB mode. For performance reasons, we recommend using limited LOB mode but increase the maximum LOB size (KB) so it’s big enough to cover the actual size you find from your query. For more information about speeding up LOB migration, see How can I improve the speed of an AWS DMS task that has LOB data? Integration with other databases or OS If you have remote objects or interfaces in your code, you need to replace them with other AWS services or equivalent external services. For example, in the SAP ASE database, you may send out email using the xp_sendmail procedure. Because Aurora PostgreSQL doesn’t support email natively, you need to redesign the process. This involves using an AWS Lambda function to send email from the database. For more information, see Sending notifications from Amazon Aurora PostgreSQL. Note: If we have database links from source database to remote server in SAP ASE, we will need to update the data. The workaround will involve redesign some of these use cases with foreign data wrappers (FDW). Migrating the database The two major tasks in this section are code conversion and data loading. We use AWS SCT to convert the schema objects (tables, views, procedures, functions). We then use AWS DMS to load the table data. Converting schema and code objects from Sybase to Aurora PostgreSQL The following screenshot shows that AWS SCT can’t convert some particular procedure or objects. When this occurs, you see a red exclamation mark on the object that it’s failing to migrate. When you choose the failed object, you see more details about the error. For example, in this case, Postgres doesn’t support the @@rowcount function. You need to manually convert this outside of AWS SCT. Prerequisites Before you get started, make sure you have the following prerequisites: AWS SCT downloaded and installed with the required Sybase and PostgreSQL JDBC drivers to your client machine. For instructions, see Installing, Verifying, and Updating the AWS Schema Conversion Tool. The latest version of AWS SCT (support for Aurora Postgres version 11 started from the AWS SCT 633 build). A Sybase database user with select privilege on the system and user schema tables and views. If you plan to use the same user for AWS DMS migration with change data capture (CDC) later, grant sa-role to it. An Aurora PostgreSQL database as your target. An Aurora PostgreSQL database user with superuser or proper privileges required. For more information, see Configure Your PostgreSQL Target Database. Converting the schema When you have the required resources, complete the following steps: Connect to the source and target databases and convert your schema. For instructions, see Migrate Your Procedural SQL Code with the AWS Schema Converstion Tool. Save the SQL scripts after you convert your schema. Run them in your target PostgreSQL database. Create tables with primary keys only. Add the foreign keys and secondary indexes after the full load is complete. As of this writing, AWS SCT doesn’t support Sybase of versions older than 15.7. You have to manually convert your schema objects. For more information about data type mapping between Sybase and PostgreSQL, see Source data types for SAP ASE. Migrating SAP ASE to Aurora PostgreSQL using AWS DMS In this section, we walk through the steps to migrate an SAP ASE database to Aurora PostgreSQL using AWS DMS. AWS DMS creates the schema in the target if the schema doesn’t exist. However, AWS DMS only creates the tables with primary keys. It doesn’t create foreign keys or secondary indexes. Even the default values may be missing. The best practice is to create the schema objects using the scripts AWS SCT generated in the prior step, then start AWS DMS to load table data. Prerequisites Before you get started, make sure you meet the prerequisites for using an SAP ASE database as a source for AWS DMS. Regarding the sa_role permissions you need to grant, you may be reluctant to grant this role to the AWS DMS user. However, AWS DMS needs this privilege to run DBCC TRACEON(3604). The AWS DMS application turns this flag on so that the output is redirected to the AWS DMS client. DBCC TRACEON is a sysadmin right. If you don’t want to grant the sa_role directly, you can work around it by developing a trigger to grant the role at the session level. Make sure you have foreign keys and triggers disabled in the target. Additionally, your AWS account should have privileges on AWS DMS and Amazon Relational Database Service (Amazon RDS). Creating your replication instance To start your migration, you first create an AWS DMS replication instance. For performance reasons, we recommend creating it in the same Region as your target Aurora database. On the AWS DMS console, choose Replication instance. Choose Create replication instance. Enter your desired instance configuration. For Instance class, you can choose from t, c, or r types. We recommend the C5 type for production due to its network and memory optimization. Creating your source endpoint You next create a source endpoint for Sybase and test the connection using the preceding replication instance. On the AWS DMS console, choose Endpoints. Choose Create endpoint. For Endpoint type, select Source endpoint. Enter your desired endpoint configuration. For instructions on using an on-premises name server and using a hostname instead of IP, see Using your own on-premises name server. After you create the endpoint, select it and choose Test connection from the Actions drop-down menu. If your SAP ASE version is 15.7 and higher and you’re willing to use TLS, you have to use ECA provider =Adaptive Server Enterprise 16.03.06. Make sure the database port 1526 is opened to the IP range of your replication instance before you test the connection. If the firewall is open but you still experience a connection issue, please contact AWS Support. Creating a target endpoint You now create your target endpoint for Aurora PostgreSQL. On the AWS DMS console, choose Endpoints. Choose Create endpoint. For Endpoint type, select Target endpoint. Enter your desired endpoint configuration. Test the connection using the preceding replication instance. For the connection to be successful, you must edit the security group for the RDS DB instance with PostgreSQL port 5432 open to the replication instance’s private IP or IP range. On the Amazon RDS console, choose your Aurora PostgreSQL DB instance. On the Connectivity & security tab, locate your security group name under Security. Choose the security group link. A new page opens to the security group interface. Choose Inbound rules. Choose Edit inbound rules. Add the IP range of the replication instance. Creating and starting the migration task To create a migration task using the source and target endpoints, complete the following steps: On the AWS DMS console, choose Database migration tasks. Choose Create task. Provide information for the task identifier, replication instance, source database endpoint, and target database endpoint. For Migration type, choose Migrage existing data and replicate ongoing changes (recommended to minimize downtime). In the Task settings section, for Target table preparation mode, select Do nothing (assuming your tables are created in the target database already). For Stop task after full load completes, select Stop after applying cached changes (at this time, you enable foreign keys and triggers in the target, then resume the task). For Include LOB columns in replication, choose Limited LOB mode (recommended for performance reasons). For Maximum LOB size, enter the larger LOB size you found from the earlier query (for this use case, 199 KB). For Enable validation, leave deselected. As of this writing, AWS DMS doesn’t support validation for SAP ASE migrations. Select Enable CloudWatch logs. This is the file that you need to monitor for task progress and errors. You can also raise the debug level when needed. In the Table mappings section, choose the JSON Delete the lines in the text box and enter your own JSON file with the table selection and transformation rules. See the following example code: { "rules": [ { "rule-type": "selection", "rule-id": "1", "rule-name": "1", "object-locator": { "schema-name": "dbo", "table-name": "tax_master" }, "rule-action": "include" } ] } The preceding code migrates the table tax_master in the dbo schema. For more information, see Using table mapping to specify task settings. In the Advanced task settings, for Create control table in target using schema, enter a target schema for these tables. If you don’t provide a schema, your task fails with the following error: [TARGET_APPLY ]E: RetCode: SQL_ERROR SqlState: 3F000 NativeError: 1 Message: ERROR: no schema has been selected to create in;, Error while executing the query [1022502] (ar_odbc_stmt.c:4428) Enable your desired control tables. AWS DMS can create four control tables for you: Apply exceptions Replication status Suspended tables Replication history . You need to purge these tables manually if they grow too large. For more information, see Control table task settings. For Maximum number of tables to load in parallel, enter a number depending on your source and target database capacity. After you create your task, its status shows as Ready. When you start or resume it, the status shows as Starting and changes to Running. To monitor the process, choose Task Monitoring, Table Statistics, Logs. For more information about monitoring, see Monitoring Database Migration Service metrics and How can I enable monitoring for an AWS DMS task? When the full load is complete, the task stops. You can take this opportunity to add or enable your foreign keys or constraints and triggers in your target. If your migration type is Migrate existing data and replicate ongoing changes, you need to resume the task so that it picks up the cached changes. When you have tasks running, you also need to monitor the on-premises source host, your replication instance, and your target RDS. Make sure you create alarms and get notified on key metrics like CPU utilization, freeable memory, and IOPS. The following screenshot shows various Amazon CloudWatch metrics. Cutting over to Aurora PostgreSQL When AWS DMS finishes the full load and applies cached changes, it moves to the CDC stage. This is when you can cut over to Aurora. You run SQL queries to validate data and use AWS services to set up backup and monitor jobs. Complete the following steps: Before cutover, analyze the indexes in Aurora PostgreSQL and test the performance of critical queries. Shut down all the application servers and stop all the client connections to SAP ASE. Close any user sessions if necessary. Verify target data has been synced with the source database. Stop the AWS DMS task. Create the foreign keys and secondary indexes in Aurora PostgreSQL if you didn’t create them before CDC started. Validate tables, views, procedures, functions, and triggers within your schema. In SAP ASE, all these objects are kept in the same sysobjects See the following code: SELECT CASE type WHEN 'U' THEN 'User Defined Tables' WHEN 'S' THEN 'System Tables' WHEN 'P' THEN 'Stored Procedures' WHEN 'XP' THEN 'Extended Stored Procedures' WHEN 'V' THEN 'Views' WHEN 'TR' THEN 'Triggers' WHEN 'F' THEN 'Functions' END, COUNT(*) FROM sysobjects WHERE type IN ('U', 'P', 'S', 'XP','V','TR','F') GROUP BY type; In Aurora PostgreSQL, you need to count each object type by querying different system tables. For more information, see Validating database objects after migration using AWS SCT and AWS DMS. Validate count indexes. In SAP ASE, enter the following code: select count(*) from sysindexes; In Aurora PostgreSQL, download the script from Validating database objects after migration using AWS SCT and AWS DMS. Validate table column default values. During the migration process, AWS DMS may have set NULL as default value for some columns. For this post, we created a table test_table with the default value set to net_live for the dname column. In SAP ASE, find the ID of the default value from syscolumns and feed it to syscomments table to generate the actual default value. See the following code: select substring(c.name,1,5) column_name,c.cdefault column_default_value from syscolumns c join sysobjects o on c.id = o.id where o.name = ‘test_table' and o.type = 'U' and cdefault <> 0; Example output may look like the following: column_name column_default_value_id dname 1326835989 You then use this ID to get the actual default value for the column. See the following code: select text column_default_value from syscomments where id = 1326835989; Example output may look like the following: column_default_value DEFAULT 'net_live' In Aurora PostgreSQL, run the following script for each table and compare your results with SAP ASE: SELECT table_name, column_name, column_default FROM information_schema.columns WHERE (table_schema, table_name) = ('dbo', ‘test_table') ORDER BY ordinal_position; Validate primary keys, foreign keys, and check constraints. In SAP ASE, enter the following code: --Note: type 1 for primary keys, type 2 for foreign keys SELECT t.name, CASE k.type WHEN 1 THEN 'PK' WHEN 2 THEN 'FK' WHEN 3 THEN 'Common' END, c.name FROM sysobjects t INNER JOIN syscolumns c ON c.id = t.id INNER JOIN syskeys k ON k.id = t.id AND c.colid IN (k.key1, k.key2, k.key3, k.key4, k.key5, k.key6, k.key7, k.key8) WHERE t.type = 'U' AND k.type in (1,2) The code status=128 brings up check constraints: select object_name(tableid) as "table name", object_name(constrid) as "constraint name", col_name(tableid,sysconstraints.colid) as "column name", text as "constraint text" from sysconstraints,syscomments where sysconstraints.status=128 and sysconstraints.constrid=syscomments.id; In Aurora PostgreSQL, download and run the scripts from the constraint section of Validating database objects after migration using AWS SCT and AWS DMS. Create the CloudWatch alarms based on your desired DB metrics, such as the following: CPU utilization Freeable memory DB connections Write latency Read latency Network metrics For more information, see Key Metrics for Amazon Aurora and Monitoring an Amazon Aurora DB Cluster. When an alarm triggers, a notification goes to the on-call team using Amazon Simple Notification Service (Amazon SNS). Add a reader node to an existing Aurora PostgreSQL cluster. By default at the storage level, Aurora replicates data across three Availability Zones in one Region. It’s fault tolerant by design. For enhanced availability, we recommend you add a reader node for a production database to automate failover in case of instance failure. You need to modify the DB cluster to enable it. A) On the Amazon RDS Console, choose Databases. B) Select your database. C) From the Actions drop-down menu, choose Add reader. D) Choose your replica source. E) For DB instance identifier, enter a name. For more information about Aurora DB cluster high availability features, see High Availability for Amazon Aurora. Switch the application servers and other clients and jobs to the Aurora PostgreSQL database. Conclusion We have demonstrated the end-to-end steps for migrating an SAP ASE database to Aurora PostgreSQL using AWS DMS. These are proven and tested steps with real customer use cases. We hope this guide has provided you the basic instructions needed to perform a similar migration. We will continue writing on SAP ASE to Aurora PostgreSQL migration topics, including post-migration rollback to SAP ASE procedures. We sincerely welcome any feedback from you!   About the Authors   Li Liu is a Database Cloud Architect  with Amazon Web Services.         Samujjwal Roy is a Database Specialty Architect with the Professional Services team at Amazon Web Services. He has been with Amazon for 15+ years and has led migration projects for internal and external Amazon customers to move their on-premises database environment to AWS Cloud database solutions.       https://aws.amazon.com/blogs/database/migrating-from-sap-ase-to-amazon-aurora-postgresql/

[poetryofchrist]

Recap - from words to music, learning the Hebrew Scriptures

Zeal I have to begin with zeal. What motivates anyone to learn about difficult history? For years I read and had read to me the King James scriptures, sometimes well, sometimes with ignorance. I knew the Scriptures were difficult. Not just for their language, but because we started reading with self-serving assumptions. For us in the 1950s, it was the empire, all that pink on the map. Diagramming, showing parallels Nonetheless I was intrigued and very curious about the whole story. In my early 60s, beginning in 2006, my company was developing a diagramming tool for logic modeling, so I began diagramming the Psalms in Hebrew. This was a source of excellent test cases for the software. I have all those old diagrams offline. They were my means of learning the square script. I began to learn Hebrew with discipline because of the experience of attending a conference on Christian Theology and the Epistle to the Hebrews at St Andrews, 2006. I was shown a narrow path to the definition of 'the son'. If 'the son' is in dialogue with 'the father', and the dialogue is represented in the book of Psalms, how could I avoid learning the original tongue of the psalms so that I could myself learn the language of what it meant to Jesus, learning his role as son. You 'know' perhaps where this leads, but we must not short-circuit the learning process. The path is difficult, again because of those self-serving assumptions we carry.

An example of diagramming a psalm

Notice all the analysis behind the scenes that can be done, graphs and queries etc. The more data I had, the more I could measure as long as I got the stems and the glosses more or less right. It was at this time I began to realize the extensive number of decisions made by a translator. Database, controlling the content The diagramming tool morphed into a full interactive development environment and I developed screens to see the Hebrew Bible from several points of view. I wasn't the first to do such things nor will I be the last. But I was chasing the concordance bug. How close can a language map to another language? Can it be 1:1? No. But it seems it might be closer than traditional translations sometimes allow. Patterns of word usage Without concordance, it is impossible to see patterns of word usage in a translation. I had the idea that Hebrew poetry played particularly on repeated sounds. To lose the repeated sounds in translation seemed to lose the affect that was intended by the poet. Here's an example of why concordant translation is critical to understanding the psalms. Psalms 1 and 2 are framed by two words used in the sequence a-b in Psalm 1:1 and in reverse sequence in psalm 2:12. The two psalms each use the same series of key words. The table below shows them at a glance. (sit-mutter-day-give-judgment-perish). This is not a threat, but a consequence. And there are several escape routes in these psalms. Meditation on the instruction (Torah) is one of them (Psalm 1). Searching for insight, accepting warnings, serving the Mystery, taking refuge, ... all these words point to the other escape routes (Psalm 2).

Keywords in Psalms 1 and 2. 

Most people hear and see parallelism. But such constructions are not as obvious as deliberate repetition of keywords. With a clear glossary by stem in the database, I was able to find these markers of poetic thought and story-telling with computer algorithms. And I was happy doing that work. From 2015-2018 I returned to and completed my translation of The Hebrew Bible, paying close attention now to the music as well as recurring words. I am very grateful both for the support of the University of Victoria Center for Studies in Religion and Society, and for the support of my publisher, Energion. Music Because I was translating the Psalms, I went to the 2010 conference on the Psalms at Oxford. There I learned about the music embedded in the text by the placement of accents as deciphered by the work of Suzanne Haïk-Vantoura. I was immediately attracted to her thesis and by 2015 I realized that I had the data in a form that could be used easily in a computer program to produce a score using the then new language, MusicXML. So I found myself distracted from translating and I produced the XML for the music of the entire Bible. The programming required me to decode the Hebrew character by character and to transcribe the libretto also. I wasn't learning to hear the language but I was certainly studying the grammar by inference. It took about 3 months to draft the program, and several iterations to get the bugs out. Eventually I got to all the music that you have seen all over my blog in the past 5 years.

An example of the thousands of pages of music produced from the Leningrad codex by web service and Oracle PL/SQL procedure (I don't usually include the English in the automated output unless I am working on the piece.)

Still at the beginning of knowledge I had started composing about 1963. I wrote a piece for my younger sister's funeral. It was performed in Montreal by the St Matthias boys under Normal Hurrle. Unfortunately, the manuscript has disappeared from my archives. Some ATB responses I wrote a year later were found in the basement by my daughter this past summer. She took them away and edited them for use at Ely cathedral in England. I don't remember writing much else but I recall not practicing the organ or piano enough, and I recall how I used manuscript paper. There was no synthesizer feedback from the paper on my early harmony exercises. 55 years later, for the last 8 months, composing is my task again, and I have had software to help me. Blank ms paper is a thing of the past. The harmonic structure of the works I am developing is somewhat determined by the constraints I have placed on myself, namely, to be true to the melodic style uncovered in the music of the Bible. But there is still room for imagination. To date, I have 'sketched' a number of pieces. I don't know if I have time to grow as a composer. I think I have started too late. You can find examples on my YouTube channel. I approach these things without knowing in advance what will emerge. I have produced a very serious oratorio from Genesis, Job, Jeremiah and several psalms. There are chorales, and lullabies, stories like Jonah, elegies, love songs, sometimes with harp, and maybe woodwinds, strings, timpani, and even all together.

The opening of the Song of Solomon, (SATB and woodwind trio) cantus firmus is in the soprano, (transposed down a tone from the default pitch). This is, significantly, one of 5 books that begins on a note other than the tonic. 

Composers All the XML files are available online here. Pick the book you want, right click on the XML file and select download. Now you have the raw data. (These are a good start, but there are still a few places where the program's rendition could be improved.) What can you do with it? All the things that composers do when they discover a new source of music from the human community. Much more than a composer of my limited experience can do. Set it in Hebrew, or with a good translation, or without words. Theologians Have you considered the impact of music on reading the Hebrew Scriptures? What we have here is a solution to reading: three tools, parallelism, recurring word patterns, and governing it all, a melodic line that gives us the tone of voice. from Blogger https://ift.tt/396ANfy via IFTTT

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With ample internal expansion space (4 internal, 3 external drive bays and six PCIe Gen two and Gen 1 slots as well as a single PCI slot), the HP Z800 Workstation packs much more energy in its tool-less case than some servers. Purging your desk of clutter is straightforward, set aside some time, and clear off your desk, a single item at a time. My standard recommendation has an Intel Core i7 Quad-Core CPU, a 256GB PCIe SSD, 16GB of RAM and a AMD Radeon Pro 450 2GB GPU. When you tape the paint strips on your wall, it is nevertheless not the very best indicator interior style workplace furniture manufacturers in chennai of how the color will look painted on the wall. Thankfully, upgrading your storage capacity is one of the easiest alterations you can make to an existing workstation Pc. If you’re on a price range, adding a lot more storage is straightforward any time, and it often gets more affordable more than time.

The industry’s initial big company-focused 23-inch all-in-1 (AIO) desktop, the ThinkCentre M90z, blends powerful performance and IT functions with sophisticated style and advanced net conferencing design and style. An uncluttered and spacious appear provides a new meaning to your office ambience and corner laptop workstations are just proper to serve this purpose read moreÂ… by utilizing the offered space to the maximum extent. AutoCAD’s native file format, AutoCAD DWG , and to a lesser extent, its interchange file format, DXF , have turn out to be de facto requirements for interchange of 2D CAD information. Prior to Intel graced us with the 8-core i7-5960X, there had been server-grade eight-core Xeon processors on the market way back in 2010 in the form of the Xeon X6550, X7550 and X7560.

Two of the PCIe x8 slots have no access to the back of the machine and are intended for use for strong state drives and other internal expansion cards. These contain our in home made Magnetar Expert Workstations for 3D animation, video editing and scientific study. Most people evaluations speak that the Wooden Pc Office Table Desk Workstation On Wheels are splendid luggage. Registration cards are filed alphabetically whereas guest folios are filed numerically. Baudrillard begins distancing himself from Marxism in “Requiem for the Media,” and in particular attacks Marx’s alleged economic reductionism, or “productivism,” and the alleged inability of the Marxian theory to conceptualize language, indicators, and communication (Habermas at the time was developing a parallel position within Vital Theory).

An AMD 16-core CPU, two monstrous 1080 Tis (or Titan Xps if you require the absolute very best) graphics cards, 64GB of RAM, 2TB of the fastest SSD storage offered, an extremely effective and stable energy supply. But these days there are some qualified interior decorators, who have all requisite skill and understanding to get a corporate look to any workplace, with the assistance of most modern day furnishing item. It is an enhanced search function that is constructed into the operating program, allowing customers to search for applications, saved files and so on, but which can also search the net. The new M Series of Quadro cards employ the most current and greatest Maxwell two architecture that is far more power effective and effective then the older Kepler primarily based cards, delivering a lot much better performance per CUDA core and the capability to drive a number of 4K displays.

Occasionally obtaining a supported video card with an unsupported driver can cause the software program to carry out poorly. The laptop workstations give a modern and fashionable look and at the very same time provide a higher high quality working milieu to your workplace, consequently their value is growing leaps and bounds. As soon as upon a time, a workstation was a radically distinct concept to a standard Pc. In their earliest incarnations, workstations have been single-user minicomputers. If a resource is managed from a Windows system, it can be managed with a PAW, even if the application itself runs on an operating program other than Windows or on a non-Microsoft cloud platform. All our pc desks are created to complement our furniture ranges, so regardless of whether you have a dedicated space for your workspace, or if it is incorporated into your living space or dining room, your new desk will constantly look wonderful.

It’s a laptop that’s solid, light weight, with an excellent battery life, excellent backlit keyboard and trackpad and decent CPU power, with no the bulk nor requirement of the larger overall performance of the Macbook Pro 15.4″. As soon as you have web access go the support page for your motherboard and download whatever drivers necessary. For much better real-time visualization of multi-layered files and projects, knowledge AMD RadeonPro or NVIDIA® Quadro® 3D graphics with up to 16 GB video memory11. All of the new workstations can be outfitted with Thunderbolt three ports as effectively as Dual 1GbE ports to allow data and video to flow freely to and from these machines. I just required the amazon cust service quantity and this was the 1st from a google search of “amazon customer service telephone quantity”.

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HP (Hewlett-Packard) is a renowned name in the IT sector, involved in the manufacturing of desktop computers, laptops, workstations, notebooks, printers, scanners and other personal computer accessories. Other desirable attributes not discovered in desktop computers at that time included networking, graphics acceleration, and high-speed internal and peripheral data buses. (Optional) If your organization uses a security details and event management (SIEM) solution, ensure that the PAW is configured to forward events to the technique making use of Windows Occasion Forwarding (WEF) or is otherwise registered with the resolution so that the SIEM is actively receiving events and information from the PAW. Current Lumia buyers, nevertheless, will have to wait until an unspecified future date to update their devices, unless they want to get early access by way of the Windows Insider programme.

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Two- and three drawer pedestals are typical amongst desks built to hold a Computer. Some incorporate a reduced shelf for printers and other peripherals at around knee level. The effects of walking and cycling laptop workstations on keyboard and mouse performance. The other thing is that offices with workstation with desktops appears excellent. For example, African Americans commit far more than 70 hours per week watching tv — 20-35 percent more than Whits(Not Just A Moral Crucial, 1994) Americans are deeply steeped into a technological society more than a lot of countries or peoples of the globe. Technologies Services do not support or preserve out of warranty pc workstations. The MaxCompiler programming environment offers full help for the network interfaces, including ultra low latency protocol stacks for widespread network protocols on the dataflow engine and low-latency PCI Express information transfer to the CPUs.

Mining Rights Act: This Act gave the Minister elevated handle more than the granting of mining rights in the African reserves. Featuring the most current dual Intel® Xeon® processors. All of this technologies puts us in control and makes us accountable for numerous of the tasks that used to be handled by pools of people working in several departments. Designs and manufactures ergonomic office furniture with adjustability. Some of the most common functions of an ergonomic workplace chair include a comfortable seat, armrest, backrest, and base to ensure maximum comfort. Intel desires to modify the game in desktop computing with a workstation that packs its upcoming, 72-core supercomputing chip. But any person who has invested in a powerful Xeon workstation in the last 12 months has had to accept a trade off.

Sitting at the top of the overall performance stack is a the Z8. This factor permits buyers to pair up to two Intel Xeon processors for up to 56 cores, with up to 3TB of RAM spread out across 24 DIMM slots. Yet another alternative is NVIDIA’s mobile M620 Quadro GPU with 2GB of VRAM, also geared toward workstations and officially authorized for pro apps like Autocad and 3DS max. With so many machines and gadgets decked up at every single workstation in an office, there are improved chances of having significantly less space and tidiness, further major to faulty organization of operate patterns and difficulty in smooth movement. Large, committed frame buffer and texture memory support lets you develop in rich, photorealistic shading and highly detailed textures – often in true colour, with maximum depth accuracy and with double buffering enabled.

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[vishers]

How I Spent the Remainder of My Education Budget This Year.

I had an education budget that needed burning.

I'm a huge believer in conferences for networking, not at all for learning. People with something truly meaningful to say write it down. If it's something that's cutting edge they publish it in a journal. If it's something that's a little more ossified or lengthy, they write a book. If I want to learn something I read about it.

So what did I want to invest in? Well, there's a couple of areas that I've been eyeing for quite awhile and, as it turns out, these kinds of books are expensive, so I had no trouble whatsoever using the remainder of the extremely generous education budget my company provides (which just invites me to say, you should come work with me!).

Programming Languages

I've long bemoaned how little I understand programming languages at the meta level. I chalk this up to the fact that I've only professionally used 3 of note (Java, Python, and Clojure if you're interested) and I really wouldn't say I've given Python a fair shake.

Clojure and Java are pretty diametrically opposed languages but they also have a weird relationship because Clojure is hosted by Java and so Java things are easily within reach. I enjoyed Java while I was writing it but when Moore's law failed and I read JCIP I needed to head for hills.

Python's strange because lots of people I respect like it quite a bit but when I write it I feel like I'm doing everything wrong. I don't yet know if that's because of me or because of it. I suspect the former.

That said, I believe that studying programming languages, especially languages with vastly different takes on what Turing Completeness means, makes you a fundamentally better programmer in whatever language you happen to be using at your day job. I also believe that the days of of the monoglot programmer are thoroughly at an end. Even if you do managed to land a stable gig somewhere you're still most likely going to be writing software in several different languages. At my current employer we have a healthy mix of Clojure, Python, SQL, Chef (if you'll allow it), Terraform (again), Elisp (my baby), and Bash. Not to mention the various services we install and maintain. I simply can't afford to specialize in any of those if I want to stay productive.

So that's what I chose to really dig deep on with the remainder of this years education budget.

Essentials of Programming Languages by Friedman and Wand

What I'm most excited for in this book is a truly thorough examination of programming languages as languages. I'm hoping that this gives me a bunch of vocabulary and terms with which to explore languages as I learn them.

Seven Languages in Seven Weeks: A Pragmatic Guide to Learning Programming Languages by Tate

I chose this book because it's literally a guide to doing what I'm hoping to be doing for 7 languages. It's possible to teach yourself anything but it's often easier with a teacher.

The 7 languages covered are Clojure, Haskell, Io, Prolog, Scala, Erlang, and Ruby.

I'm covering some of the same ground here as I will in future books but, like I said, the main point of this book is learning how to quickly grok a language, not what any of the specific languages have to offer.

The Go Programming Language by Donovan and Kernighan

I'm primarily interested in Go because Rob Pike has been trying to get the world to accept CSP as the way to organize systems for 30 years and he seems finally to have done it here.

Learn You a Haskell for Great Good!: A Beginner's Guide by Miran

I want to learn Haskell because I want to truly grok laziness. No other language of any degree of use is fully lazy. I want to know what falls out of that.

Learn You Some Erlang for Great Good!: A Beginner's Guide by Hébert

I want to learn Erlang because people tell me that nothing teaches you about parallelism better than Erlang. I'm also interested in it's QuickCheck implementation although that may be proprietary.

The Little Schemer by Friedman and Felleisen

I'm mostly interested in Scheme because it was the language used by SICP, a book of nearly mythical importance, and because of Continuations. Ever since Kyle Burton tried to explain them to me I've been interested in them.

The Reasoned Schemer by Friedman, Byrd, and Kiselyov

I hope to pick up logic programming from this book.

Real World OCaml by Minsky, Madhavapeddy, and Hickey

Technomancy recommends OCaml. So does Yegge. Lisp with a strong typing system? I guess that sounds pretty cool. Maybe I'll learn to love type systems from this. :)

Let Over Lambda by Hoyte

This cringe-inducingly introduced book claims to be about macros. Clojure's never taught me much about those. I'd love to learn more.

Elements of Clojure by Tellman

Everything I've ever seen or heard from Zach Tellman is worth listening to. If he wrote a guiding philosophy book about how to use Clojure I want in.

Applications/Services

I think you need to learn about what you have in production. It's OK to be quick and dirty when you're rushing to ship but eventually you've gotta hunker down and actually understand what's going on. At least someone does. And I'm willing to be that someone.

Effective Python: 59 Specific Ways to Write Better Python by Slatkin

As I mentioned, even though I did Python professionally for almost 18 months I never felt like I gave it a fair shot. And I still feel like I'm fighting it all the time. It feels like a toy. I'd like a no-nonsense guide on how to do it right. You could argue that this book belongs in the languages section but, and I'm sorry if this sounds snobbish, I don't think Python's going to teach me anything interesting about languages or programming. Some of the most critical components of my employer's systems are written in Python. I want to know how to make them sing.

Kafka: The Definitive Guide: Real-Time Data and Stream Processing at Scale by Narkhede

Kafka is an important component of our data ingestion architecture which is basically one half of what my company does. We don't push it that hard though, and we still see some consistent, shady behavior from it. I want to stop that.

Kubernetes: Up and Running: Dive into the Future of Infrastructure by Hightower and Docker in Action by Nickoloff

My company recently took the dive into the containerization buzzcraze. I do not think very highly of that. I believe there's a ton of complexity introduced by it that people ignore because it sounds cool.

That said, it's the world I live in and I want to know how to be good at it. K8s: Up and Running is the book recommended to me.

Java Concurrency in Practice by Goetz

It used to be said that there were basically two vectors into the Clojure ecosystem: Ruby developers sick of performance woes and piss-poor compatibility stories and Java developers who had finally gotten around to reading JCIP, were scared out of their mind (👋), and had bad memories of C++ (I'm looking at you, Scala).

These days, though, I actually know a lot more Clojure developers (at least at my company) with little to no prior Java experience. This is a shame because Effective Java is very nearly required reading for writing truly Effective (or at least, Performant) Clojure. In fact, there's been a bunch of discussion lately among the engineers at my company about wrapper libraries like clj-time that are misused because the wrapped library was misunderstood.

Clojure's concurrency primitives are really interesting but they're hosted on the JVM and so thoroughly understanding Java Concurrency actually is important if you want to actually grok them.

I've read JCIP before but had to leave it behind at a former employer. I wanted this one for my shelf.

Building Evolutionary Architectures: Support Constant Change by Ford, Parsons, and Kua

I heard about this book from Fowler. I generally think Fowler is always worth listening to. I'm hoping to continue to learn about architecture from this book.

The Terraform Book by Turnbull

We use Terraform to manage the vast majority of our infrastructure. It's always been something I've poked at until it works and then moved on from. That needs to stop.

Problem Solving

I have always felt like a very weak problem solver. I feel trapped by Cognitive Biases and don't really understand how to overcome them. I fear failure and it shuts my thinking down. I latch on to solutions that I see rather than thinking broadly. I want to be better here.

Thinking, Fast and Slow by Kahneman

I'm interested in this because of the recent national conversations around Cognitive Biases. I distrust myself deeply, but I want to be smart about it. I'm hoping to learn more about my cognition here and to learn strategies for overcoming my biases.

Thinking Forth by Brodie

This could go in the languages section. The reason I put it here is because, on the tin, it reports to be about how to think about applying programming languages to the problems you face.

The Little Prover by Friedman and Eastlund

I believe that my revulsion to proofs in Math has made me a weaker software developer. Ever since watching through the SICP course I was blown away by the power of wishful thinking and it only occurred to me much later that the thing that annoyed me most about proofs was essentially an educated wishful though, just like I apply every day at my job. I want to be better at proofs.

How to Solve It: A New Aspect of Mathematical Method by Polya

I heard about this book from Rich Hickey. Rich Hickey's another person that you should just always listen to. Hammock Driven Development is a talk every single developer in the world should listen to.

One key assertion in that talk is the problem solving is not about innate intelligence or something that some people are good at and everyone else is bad at. Instead, it's a skill that we can practice. This is the book he recommended to practice it.

Leadership

The Manager's Path: A Guide for Tech Leaders Navigating Growth and Change by Fournier

I've heard nothing but good things about this book. At my stage of life I need to manage better or I'm going to sink. I don't have enough personal time to leverage to accomplish all the things I want or need to accomplish. I've been on a long-ish course of study on this topic and I want to continue.

DevOps

So why aren't there any books here? Primarily because I already used some of my education budget to get books in this vein and I haven't gotten to consume them yet. I'm especially excited to dig into The DevOps Handbook after having read through The Phoenix Project, a book I can't recommend more that was given to me by Connor McArthur. It's also arguable that some of the other books I've picked up like the Kafka and k8s resources would fit in this category. But, I ran out of money and felt that the rest of the books on this list were more important.

One technology I really should be better at than I am is Chef. A big reason that I didn't buy a Chef book though is that there apparently aren't really any good ones. Oh well, I'll stick with the docs.

If I haven't said so publicly before: The Interlibrary Loan system is a National Treasure. So why didn't I get all these books from there? Well, for some of them, I did. I'm currently reading a copy of ZooKeeper by Reed and Junqueira and Building Evolutionary Architectures and I have several more on order. Sadly, these sorts of technical books can sometimes take a while to find. I had the budget, I figured it was worth spending. If any of the books don't prove to be worth it, I'm planning on donating them to the library.

Finally, what didn't make the cut just yet? In the interest of time I'm not going to be explicit about what interests me about every one of these.

Making Work Visible by Degrandis

Effective DevOps by Davis

Release It! by Nygard

Effective Java (3rd Edition) by Bloch

SICP by Abelson and Sussman

How to Design Computer Programs by Felleisen

Bootstrapping by Bardini

The Creative Computer by Michie

The Linux Programming Interface by Kerrisk

The Rust Programming Language by Klabnik

Compilers by Lam and Aho

Enterprise Integration Patterns by Hohpe

Infrastructure as Code by Morris

Paradigms of Artificial Intelligence Programming by Norvig

ANSI Common Lisp by Graham

Practical Common Lisp by Siebel

The Art of the Metaobject Protocol by Kiczales

The Scheme Programming Language by Dybvig

The Practice of Programming by Kernighan

Lisp in Small Pieces by Queinnecc

Clean Code by Martin

The Seasoned Schemer by Friedman

Purely Functional Data Structures by Okasaki

The Little MLer by Felleisen

The Clean Coder by Martin

The Unix Programming Interface by Kernighan

Thanks to everyone who recommend books to me and chatted with me on Twitter. I got help from #erlang, #haskell, and #go-nuts on freenode. Special thanks to fogus for putting together a really interesting list of books that I can't wait to dig through.

[kelsusit]

Enhancing Visual Comfort At A Laptop Workstation

A lot more usually than not these days the bedroom is also utilized as a residence office location for individuals to use their computers and work from property. While accessing the hard disk, a recalibrate operation failed, even after retries. six. Place desks in the “energy position” with the back to a strong wall rather than an open space. Furthermore, you are entitled to utilize the VmWare logo and trademarks on your enterprise cards, websites, or anyplace you would like individuals to know that you are a VCP. VMware Workstation Player (formerly recognized as Player Pro) is a desktop virtualization application that is offered for free of charge for individual use. This refurbished HP workstation supports Intel’s Xeon Quad Core and Hex Core processors ranging from two.00GHz with 4M cache to three.2GHz with 12M cache and six DDR3 ECC RAM slots hold up to 48GB at speeds of 1333MHz. 5 studies of varied workstations found that personnel described feeling significantly less musculoskeletal discomfort following replacing their typical chairs with posture assistance chairs.

The machine required to be in a position to deal with 3d modelling, rendering, 2d cad, some gaming and the option of going to VR. Boasting a sleek design and style that adds class to your workspace, these PCs provide unmatched overall performance. There are some sorts of desks that are better at facilitating a functional gaming set up than other folks. The Z8 and Z6 models each and every support up to dual CPUs, and an optional dual 10 GbE network module for higher speed networking at half the cost of existing HP Workstations, and with out consuming a valuable PCIe expansion slot. I’m actually trying to string the life of one of our editing bays out a tiny longer, so I was searching for RAM when I came across an ad for a 2 unit rackmount server with dual quad core Xenon processors and 24GB of RAM.

Come go to us in person and view the range of office workstations in our Sydney showroom yourself. If your functionality demands have you acquiring mid-variety or higher-finish graphics cards, you may get all the screen true estate you want with one card. A actual gaming powerhouse demands far more graphics power, excellent cooling, and a motherboard especially developed to assistance the best gaming hardware. The HP ZBook x2 also undergoes dozens of tests for certification and optimized efficiency with the industry’s major computer software providers like Adobe and Autodesk. The whole point is if you could set up 1 server as an alternative of a single hundred, drastically boost data safety, minimize the all round cost and produce a 30-40% boost in performance, would that help your organization?

As an alternative, duties should be split amongst the employees a front desk agent may execute posting, a night auditor the verification and a cashier the settlement. All of our workstations come from respected producers like Knoll, HON, Steelcase, Allsteel, and Herman Miller, so our clients can rest assured that they will acquire items with an unmatched mixture of style, functionality, and durability. Throughout checkout a luggage outpass has to be obtained from the cashier stating that the guest has settled his account and returned the space essential. I witnessed the LEAN manufacturing process and how staff adjustments jobs to maximize efficiency at distinct times of day. Techfruits is partnered with the world’s top networking hardware and software organizations, to make certain that we can offer ideal options for your entire organization.

You should confirm that your workstations have installed the “Cumulative Update for Windows 10 Version 1607 for x64-based Systems (KB4013429)” released by Microsoft on Tuesday, March 14 2017. The same message may well include the name of the machine that has the boot files on it. If the boot image location is not specified, the workstation sends one more UDP message to query the server. The new CPUs will increase resource monitoring and allocation abilities in addition to much more cache and more cores. Importing CAD files is now multi-processor aware. • In this extremely transaction, front office clerks shall post money payment as a credit in the guest folio. Although Nvidia drivers enable asymmetrical graphics cards to perform collectively (for example assigning a specific card for PhysX duty) that will not be an alternative here.

The subsequent most critical element after your processor is your graphics card. By contrast, Parallels Workstation (accessible as a free of charge beta) is stated to offer “close to native” overall performance, which might be adequate for users who want to run Visio, Project, or one of the numerous other Windows-only productivity apps – though gamers will almost certainly nevertheless want to use Boot Camp and preserve just one OS operating at a time. We are certain that we have the best remedy for any of your boardroom desks or residence workplace desks needs. These worlds are dominated by Intel® Xeon® processors. Basically, this is a technique aimed at Common Goal GPU (GPGPU), exactly where CUDA- or OpenCL-enabled application requires benefit of the large parallel-processing power of modern graphics cards for very multi-threaded tasks like film 3D rendering or cryptocurrency mining.

The HP Z2 Mini G3 workstation is the most potent mini Computer we’ve reviewed, putting category-top performance into a compact chassis. VMware gives privileges to the VCP holders, they can also use the VCP logo on their business cards and internet sites, and among other things they get a complementary license for VMware workstation 8, invitations to beta exam applications and discounts to VMware events. Our Quiet Workstation Laptop is our Intel 5th Generation (Socket 1151) Xeon E3 Powerhouse Pc developed for the executive who requirements a expense-successful Pc, exactly where reliability, up-time, stability, and wide compatibility are the foremost priorities. The desk is arguably the most important piece of house workplace furnishings you can acquire. Would you thoughts briefly explaining why (for both the graphics card and windows 7).

Recent technological developments have produced laptops as powerful as the desktop Pc. Gaming laptops are laptops that most game participants of today choose to use. VMware Workstation Pro permits you to run several operating systems at when on the same Windows or Linux Pc. Produce true Linux and Windows VMs and other desktop, server, and tablet environments, complete with configurable virtual networking and network condition simulation, for use in code development, solution architecting, application testing, item demonstrations and more. To minimise late check outs, the front office need to post verify out time notices in conspicuous places such as back of the guest room door, FO, in departure material and so forth. The Application Licensing Service reported that the application is operating inside the timebased validity period.

Graphics processing units (GPUs) can be added to your HP Workstation as an extension of your computing capabilities. For example, African Americans invest a lot more than 70 hours per week watching television — 20-35 % far more than Whits(Not Just A Moral Crucial, 1994) Americans are deeply steeped into a technological society more than many countries or peoples of the planet. The answer gives an complete company remedy for database migration amongst SQL servers (any version). An out-of-balance situation amongst the non-guest accounts, for example, will help the night auditor to detect and appropriate errors without having getting to overview all transactions occurring on that day. Wilson says we can’t be slaves and be Africans at the exact same time, simply because if one is to grow to be what we see ourselves as today, slaves, we have to discard of our those qualities that make 1 of Africa… This is profound, and it is essential.

“At initial, rebellion was incoherent, but to the degree that these peoples became much better organized and technicized, rebellion became a national affair.” These days, as technological gizmos with their imbedded flood the collective space of diverse people about the globe, there is some sobering realization by these recipients as to the alienating nature of the new technologies as they obliterate their cultures and imposes on them a foreboding sense that they shall have to obey the deep pocketed owners of the wealthy nations. In addition it makes it possible try what he says for you to use integrated graphics rather than your dedicated graphics card when it really is far more efficient general for your machine to do so.An additional function, Intel Smart Response Technologies, makes it possible for you to dedicate a portion (up to 64GB) of your strong state drive to “Cache” as a result giving your difficult drive solid state drive like overall performance.

Savings – By utilizing ergonomic workstations, employers save enormous amounts of cash otherwise spent in compensation claims, remedies and litigation. The Z440, Z640 and Z840 desktop workstations are anticipated to be offered beginning in late September and are anticipated to begin at $1,259, $1,759 and $two,399, respectively. Panel systems permit a company to offer their employees with some degree of privacy and quiet without having getting to spend the significant charges associated with providing folks a full workplace. Considering that a lot of individuals have a lot more than one particular computers in their properties, it comes as no surprise that executive and pc desks are so popular. At the desk, it can energy dual 4K displays from the HP ZBook Dock with Thunderbolt 37. In layman’s terms, its ultimate goal is to make Windows ten a lot much more versatile, permitting it to be installed on a wider assortment of devices without having becoming primarily based on distinct, pre-existing product variants.

BOXX workstations are goal-constructed to deliver unparalleled functionality for a wide range of applications and workflows. Most African peoples in South Africa know and comprehend that both individual and collective psychology are constructed from these experiences which can be consciously retrieved from memory, written history, as properly as to these experiences which have been forgotten or repressed, but which still represent themselves in person and collective habits, tendencies, traditions, emotional responsivities, perspectives, approaches of realizing and processing data, attitudes and reflex-like reactions to certain stimuli and scenarios. The phone number for customer service is still effectively-hidden on their internet site.

Once you have selected you are overall workplace appear and implemented the workstations into your space, you will be amazed at how your workplace space is transformed. This kind of hardware tends to be thirsty, and, to that finish, HP will fit the systems with up to a 1.7kW PSU. Even better, there is an optional keyboard case for when the urge to get productive strikes. The Computer software Licensing Service reported that the Token Retailer consists of a duplicate token. The activation server determined the specified product essential has been blocked. Non-CPU PCIe slots may possibly see a reduce of up to 10%. The time it takes to style, make and install your office partitions will largely depend on the interior designer you choose for your space. Universally supported with the latest content creation application tools, Digital Storm’s Quadro workstations enable inventive pros to do far more in less time on a wide range of content material creation projects.

Server applications are normally distinct from applications that are installed on workstations. NVIDIA Maximus Technologies combines the visualization capabilities of NVIDIA Quadro® GPUs with the HPC processing energy of NVIDIA Tesla GPUs – all within a compact midi-tower chassis. Workstation optimization can take up to 80 methods, but with the HP Overall performance Advisor, you can do it in two — one-click to increase efficiency of your crucial applications and one more to pick and download certified graphics drivers. You can argue on there is no want of workstation with desktop searching very good because at the end of the day the perform output is extremely crucial. Most of the time, integrated graphics will be just fine, considering that you won’t be playing 3D games on your function desktop.

Some desks even come with laptop systems integrated, which indicates the operating parts of your pc can be hidden a lot much better, a little like a kitchen with constructed-in appliances. The principal assumption in the procedure of designing new modular desks was to create and define a normal which – due to its modular construction – would enable a wide variety of accessible combinations of program elements. Throughout the 1990s and 2000s, the 4 big vendors for workstations had been HP, IBM, Sun, and Silicon Graphics. HP’s reinvention of detachable PCs began earlier this year with the introduction of the HP Spectre x2 and the HP Elite x2. Today’s introduction of the HP ZBook x2 completes HP’s trifecta with its most potent detachable resolution targeted for the inventive community.

The Indy workstation brings visual computing to the server planet, enabling you to take full benefit of the sector-leading file, database, and supercomputing server power of Silicon Graphics goods. As you’ve probably realized, a lot of powerful gaming laptops also make completely capable mobile workstations (as long as you never get as well distracted by Steam). To date, modeling has been done nearly entirely with hard-coded committed systems usable only for one kind of design: there’s not a lot in frequent amongst ANSYS and SPICE. In simple words, Network architecture refers to the basic layout of the network, which requires the hardware, software, connectivity, communication protocols and mode of transmission, such as wired or wireless.

Corner desk- Best for both Desktop computers and Laptop computer systems, Big space beneath the desktop where you can comfortably stretch your legs. Autodesk 2D and 3D CAD software is utilized by engineering disciplines across all industries. You can entirely configure the workstations you want to rent, enabling you to expand processing power when you want it for particular projects. As an entry-level model, the Z440 is a single-socket program in a mini-tower kind element, supporting up to 128GB memory and up to four drives. FreeCAD is a critical open-source supplying that supports parametric 3D modeling, which implies you can modify your style by going back into your model history and altering its parameters. Right here at huntoffice we provide a range of furnishings that is particularly developed for residence workplace purposes.

Entry-level desktop, notebook and netbook computers nowadays have far more raw processing and storage capacity than a lot of high-end workstations had a decade ago. Make sure that you withhold your organization Computer workstation or laptop free from games and other distractions. If space is at a premium within your home there are clever design ideas that can support you make the most of the room you have with out cluttering up your bedroom with desks and filing cabinets. Mobile laptop workstation is carried anywhere, and that is the excellent benefit of the workstation Computer. So, if you are in search of the ideal mobile personal computer workstation then just check out the under list of 5 very best workstation laptop for lots of purposes like for generating 3D models, architecture performs, and almost all the ambitions.

Browse the range of property office designs, finishes and features obtainable on the web or get in touch with us right now to book a free house office design and style check out and discuss your demands in more detail. In the prevailing time, the shared workplace space is gaining much more recognition with service sector market. Users can use their virtual machines in any browser and does not call for any specific plugins or even Adobe Flash This makes accessing your virtual machines a breeze. Don’t underestimate these laptop workstations, as they will make your perform dazzle like by no means before giving you the custom options, although delivering the best-in-class functionality. Go to User ConfigurationPoliciesAdministrative TemplatesWindows ComponentsInternet Explorer, and allow the alternatives beneath.

Do not location the keyboard on best of the desk. What we can do as South Africans with this material is to make certain we study it, and pass it on to as a lot of folks as men and women. Exclusively-created, ergonomic workstations have the capability to make any office look perfect and encourage workers to be more productive. As Intel has launched the Ivy Bridge versions of its Xeon E5 variety, HP has announced that the chips will be offered in its Z-series workstations (except for the E3-primarily based Z230). Diploma Courses: Skilled level diplomas in a variety of subjects like multimedia improvement, net development, organization & entrepreneurial studies. These computers are everywhere, from your workplace, to your residence, schools, laboratories and even public places like a public library, universities and so on. There is a fantastic possibility that you have accessed this internet site utilizing a desktop personal computer.

They ran various operating systems, utilised distinct CPUs and graphics solutions, and had specialized hardware components that have been tough or, in some cases, not possible to fit into a common x86 consumer method. It is quite a massive desk and not an inch of it is wasted, and thanks to its wise CPU stand for desk top computers, there is even much more space for you to operate on. Any desktop workstation requirements a high-end graphics card. Furniture items such as reception desks, reception sofas, computer workstation, executive chairs, conference area tables, bookcases, filing cabinets, and so forth. The Computer software Licensing Service reported that a Token Retailer token has an invalid extension. Its higher-definition ATI graphics card creates clear, precise and flawless graphics – just what a graphic designer needs.

The configuration file for the application includes an invalid tag. Broadberry Graphics Workstations are developed and built for the most recent Digital Content material Creation applications. The method comes with a 1,125-watt power provide, so you’re all set to add one more higher-finish graphics card and numerous tough drives. L shaped office desks, as the name suggests, are shaped as the alphabet L. They are the most popular decision amongst offices when it comes to buying office furniture that creates the maximum operating space. The requested operation could not be performed since the directory service is not the master for that variety of operation. Primarily based on HP’s exclusive and comprehensive security capabilities at no additional expense among vendors as of January 2017 on HP Mobile Workstations with 7th Gen Intel® Processors.

Source’s collaborative workstations give you the inventive freedom of shared space even though sustaining special work regions when required. Gone are the days of plain desks and functional chairs. Hearing all the negative sentiments toward the Windows 10 Education Product Crucial OS created me actually cautious in upgrading from Windows 7. VRAM, or Video RAM, focuses on storing graphic information and so performs with the GPU. But the new Mac Pro is nevertheless a lengthy methods away (it’s not anticipated until sometime in 2018), and there might not be considerably point to displaying it off if Apple isn’t prepared to give the finished specs. The machine is far more of an experiment than an work to change the way desktops and workstations are created, Wuischpard stated.

Compared to the MSI WE62, this model is equipped with a a lot more powerful Nvidia Quadro M3000m workstation class graphic card with 4GB of graphic memory. Discover your dream office desk or achieve a full style makeover with Amart Furniture’s huge variety of residence office furnishings. 9. Maximized dual-channel efficiency demands SODIMMs of the identical size and speed in both memory slots. If you are making use of a laptop all day at a desk contemplate purchasing separately a wireless keypad that has ergonomic design. For each and every arm we assessed the setup method, sturdiness, and the range of movement, and we had individuals of varying heights use and adjust the monitor in both sitting and standing positions. Effectively, it’s about time we started speaking to each and every other and not at have to speak and listen to 1 another and quit dictating our half-cooked thoughts-sets to those we deem to be reduce than us, and however we are in the same prison, the very same devastated reality that we face as the Africans of Mzantsi.

The Z-Series workstation lineup encompasses each desktop and mobile models, and even a strong all-in-a single. Suspended cabinet must be equipped with protective machines ESOC equipment feeding 1 group – on the video wall meals, group – desktop gear provide (terminal workstations, extra space for a computer to connect and three slots for radio stations connected) and a group of computer workstations and projecting power. And with the capability to load up so considerably memory, it is attainable to run several RAM-instensive applications at the identical time. That is mostly due to improved networking hardware: a 2×2 antenna array and 802.11ac WiFi help. HP EliteBook mobile workstations also supply a range of storage capacity possibilities, like Smart SATA, Self Encrypting or Strong State Drives, with up to RAID 5 capability.

In addition CAD workstations often need to function at an order of magnitude tougher than an workplace Computer throughout its life time, so they will be stressed considerably tougher and will carry out hotter thereby requiring better cooling. Most people evaluations speak that the Wooden Pc Workplace Table Desk Workstation On Wheels are splendid luggage. The choice of AMD graphics cards has also been expanded over preceding generation workstation families with the ATI FirePro V3700, V5700 and V7750 all presented as normal possibilities. HP’s new workstation loved ones, the Z Series is one thing to get quite excited about. • Notebook (laptop) computer systems are employed by individuals who need the energy of a desktop technique, but also portability. Rounding out the new enhancements to MAINGEAR’s lineup of award-winning pc workstations and gaming desktop computers is the introduction of the EPIC Control Center, a GUI manage panel for monitoring the thermal efficiency of a MAINGEAR higher functionality computer program that features granular fan control, genuine time temperature monitoring, and occasion-based lighting control.

1. Primarily based on publically offered details of workstation competitors as of October three, 2016 with volume of at least 1 million units annually as of October three, 2016 possessing

Filed under: Tagged: ergonomics, laptop, workstation from KelsusIT.com – Refurbished laptops, desktop computers , servers http://bit.ly/2jYNgNR via IFTTT

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Oracle DBA course teaches you: Patching The Database

Oracle DBA course is always available for you to make your profession in this field.

Oracle have already declared the following essential changes to Oracle Database Spot Sets: “Starting with the first patch set for Oracle Database 11g Launch 2 (11.2.0.2), Oracle database patch places are complete set ups of the Oracle database application. In previous produces, Oracle database patch places comprised of a set of information files that changed data files in a current Oracle house. Starting with Oracle database 11g Launch 2, patch places are complete set ups that substitute current set ups.” Information can be available on Metalink Observe 1189783.1.

That is great and excellent unless we are not being flooded with a multitude of extra areas on top of these set ups. It’s another tale if 11.2.0.2 is really a patchset of 11gR2 or is it rather 11gR3.

As of last night, May 4th 2011, there are 324 different areas available for A linux systemunix x86-64 on top of 11.2.0.2. For Solaris SPARC 64-bit, they are only 214.

Looking at the insects repairs you might have combined feelings: while we are all used to seeing repairs for the never finishing ORA-00600 and ORA-07445 errors, I really cannot know how we still experience problems with incorrectly came back data. That should be so foundation need from a database, right?

10190421 Possible incorrect outcomes in question using link by stipulation with parrallelism

10353054 Wrong outcome due to lack of partial joins

Looking at the readme data files those “wrongly came back data” errors might even be seen arriving sequentially

As DBAs, when studying e-mails for example, we all probably have this light grin on our encounters when seeing terms like “data base” and “table space”. Well, probably not a database guy who creates them? Or DB2 qualifications. But how about when you see them in Oracle’s documents:

By the way, did you will discover the misprint above, the phrase parallelism? How about using a cause checker? Here is a screen shot from the readme:

Another problem I am surprised with: if a younger designer does not manage his/her exclusions in the PL/SQL rule, (s)he might be excused: (s)he is studying, we all get some things wrong.

Just set up spot 12311357 which is GI PSU 11.2.0.2.2 as it provides PSU 11.2.0.2.2 which on its part contains CPUAPR2011. If using RAC and ASM add 10157506 (11.2.0.2 RAC GI BUNDLE1) and the suggested package areas up to BP10 (BP10 is spot 12773458, the spot must provide on the Oracle house of Oracle Data source as well as Oracle Lines Infrastructure). For second viewpoint on this simply just click here.

Important for Siebel users: if you run Siebel on top of Oracle RAC, examine Metalink Observe 1297080.1 Documentation Siebel Programs 8.1.1.2 With 11gr2 Rac [ID 1297080.1]. It says at the end: “It was also resolved by item promotion that ultimately oracle database edition 11.2.0.1 is the bottom edition that is reinforced and means that any 11.2.0.1 and up edition is included”. That is: put all areas described previously also for Siebel applications!

Oracle training course is more than enough for you to make your career as an Oracle Certified Professional.

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50% off #Selenium – Java (Best for automation beginner)- on Live App – $10

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