#C++evaluation

[govindhtech]

Watsonx.data Presto C++ With Intel Sapphire Rapids On AWS

Using Watsonx.data Presto C++ with the Intel Sapphire Rapid Processor on AWS to speed up query performance

Over the past 25 years, there have been notable improvements in database speed due to IBM and Intel’s long-standing cooperation. The most recent generation of Intel Xeon Scalable processors, when paired with Intel software, can potentially improve IBM Watsonx.data performance, according to internal research conducted by IBM.

A hybrid, managed data lake house, IBM Watsonx.data is tailored for workloads including data, analytics, and artificial intelligence. Using engines like Presto and Spark to drive corporate analytics is one of the highlights. Watsonx.data also offers a single view of your data across hybrid cloud environments and a customizable approach.

Presto C++

The next edition of Presto, called Presto C++, was released by IBM in June. It was created by open-source community members from Meta, IBM, Uber, and other companies. The Velox, an open-source C++ native acceleration library made to be compatible with various compute engines, was used in the development of this query engine in partnership with Intel. In order to further improve query performance through efficient query rewrite, IBM also accompanied the release of the Presto C++ engine with a query optimizer built on decades of experience.

Summary

A C++ drop-in replacement for Presto workers built on the Velox library, Presto C++ is also known as the development name Prestissimo. It uses the Proxygen C++ HTTP framework to implement the same RESTful endpoints as Java workers. Presto C++ does not use JNI and does not require a JVM on worker nodes because it exclusively uses REST endpoints for communication with the Java coordinator and amongst workers.

Inspiration and Goals

Presto wants to be the best data lake system available. The native Java-based version of the Presto evaluation engine is being replaced by a new C++ implementation using Velox in order to accomplish this goal.

In order to allow the Presto community to concentrate on more features and improved connectivity with table formats and other data warehousing systems, the evaluation engine has been moved to a library.

Accepted Use Cases

The Presto C++ evaluation engine supports just certain connectors.

Reads and writes via the Hive connection, including CTAS, are supported.

Only reads are supported for iceberg tables.

Both V1 and V2 tables, including tables with delete files, are supported by the Iceberg connector.

TPCH.naming=standard catalog property for the TPCH connector.

Features of Presto C++

Task management: Users can monitor and manage tasks using the HTTP endpoints included in Presto C++. This tool facilitates tracking ongoing procedures and improves operational oversight.

Data processing across a network of nodes can be made more effective by enabling the execution of functions on distant nodes, which improves scalability and distributed processing capabilities.

For secure internal communication between nodes, authentication makes use of JSON Web Tokens (JWT), guaranteeing that data is safe and impenetrable while being transmitted.

Asynchronous data caching with prefetching capabilities is implemented. By anticipating data demands and caching it beforehand, this maximizes processing speed and data retrieval.

Performance Tuning: Provides a range of session parameters, such as compression and spill threshold adjustments, for performance tuning. This guarantees optimal performance of data processing operations by enabling users to adjust performance parameters in accordance with their unique requirements.

Limitations of Presto C++

There are some drawbacks to the C++ evaluation engine:

Not every built-in function is available in C++. A query failure occurs when an attempt is made to use unimplemented functions. See Function Coverage for a list of supported functions.

C++ does not implement all built-in types. A query failure will occur if unimplemented types are attempted to be used.

With the exception of CHAR, TIME, and TIME WITH TIMEZONE, all basic and structured types in Data Types are supported. VARCHAR, TIMESTAMP, and TIMESTAMP WITH TIMEZONE are subsumptions of these.

The length n in varchar[n] is not honored by Presto C++; it only supports the limitless length VARCHAR.

IPADDRESS, IPPREFIX, UUID, KHYPERLOGLOG, P4HYPERLOGLOG, QDIGEST, TDIGEST, GEOMETRY, and BINGTILE are among the types that are not supported.

The C++ evaluation engine does not use all of the plugin SPI. Specifically, several plugin types are either fully or partially unsupported, and C++ workers will not load any plugins from the plugins directory.

The C++ evaluation engine does not support PageSourceProvider, RecordSetProvider, or PageSinkProvider.

Block encodings, parametric types, functions, and types specified by the user are not supported.

At the split level, the event listener plugin is not functional.

See Remote Function Execution for information on how user-defined functions differ from one another.

The C++ evaluation engine has a distinct memory management system. Specifically:

There is no support for the OOM killer.

There is no support for the reserved pool.

Generally speaking, queries may utilize more memory than memory arbitration permits. Refer to Memory Management.

Functions

reduce_agg

Reduce_agg is not allowed to return null in the inputFunction or the combineFunction of C++-based Presto. This is acceptable but ill-defined behavior in Presto (Java). See reduce_agg for more details about reduce_agg in Presto.

Amazon Elastic Compute Cloud (EC2) R7iz instances are high-performance CPU instances that are designed for memory. With a sustained all-core turbo frequency of 3.9 GHz, they are the fastest 4th Generation Intel Xeon Scalable-based (Sapphire Rapids) instances available in the cloud. R7iz instances can lower the total cost of ownership (TCO) and provide performance improvements of up to 20% over Z1d instances of the preceding generation. They come with integrated accelerators such as Intel Advanced Matrix Extensions (Intel AMX), which provide a much-needed substitute for clients with increasing demands for AI workloads.

R7iz instances are well-suited for front-end Electronic Design Automation (EDA), relational database workloads with high per-core licensing prices, and workloads including financial, actuarial, and data analytics simulations due to their high CPU performance and large memory footprint.

IBM and Intel have collaborated extensively to offer open-source software optimizations to Watsonx.data, Presto, and Presto C++. In addition to the hardware enhancements, Intel 4th Gen Xeon has produced positive Watsonx.data outcomes.

Based on publicly available 100TB TPC-DS Query benchmarks, IBM Watsonx.data with Presto C++ v0.286 and query optimizer on AWS ROSA, running on Intel processors (4th generation), demonstrated superior price performance over Databrick’s Photon engine, with better query runtime at comparable cost.

Read more on Govindhtech.com

[living-mites]

staring at myself in the mirror evaluating all my physical problems and diagnosing myself and prescribing myself diff remedies. I'm house btw.

[jukeboxhound]

oh my GOD what they don't tell you as an undergrad is how deeply your 4-year major is gonna end up shaping your thought process

my current 2-year MA program is technically an anthropological subdiscipline and i am FIGHTING FOR MY LIFE not to pull the philosophy student's term paper argumentation style of being like "if A and also B then C and probably D but not E for all these other reasons and therefore F. QED." I HAVE TO ACTUALLY CITE SOMETHING (?????????) FOR EVERY STEP OF THE ARGUMENT. manhandling someone's brain to a conclusion with logic and sheer force of will is Somehow Not Science Actually????

the saddest part is that i have not been a philosophy major in 15 years

I AM BEATING MY HEAD AGAINST THIS FINAL FUCKING PAPER TO THE BEAT OF 'ANOTHER ONE BITES THE DUST'

[cringelordofchaos]

"in thousands of years they will dig up your skeleton and know what you truly were" who said im dying

[oscarpiastriwdc]

if i get fired during my annual employee evaluation today i. can go home and sleep

[1wn8ure]

making it through life with benchtrio clenched in both fists

[luciphe-r]

i have had to start interacting with boomers the way my biologist mom interacts with her algae

[aeide-thea]

so i went to reblog some fanart earlier and started to tag it #oh this is. incredible actually, and then paused and thought, @‍self why the 'actually.' what is that adverb conveying. and i contemplated it for a bit, and finally concluded: well, shit. it's reflexive deprecation.

the thing is, deprecation is my starting position pretty much always, and that's a problem in itself, but mostly my problem; but when you're talking abt somebody else's work, and you start backing defensively away from imagined negativity before anyone's even actually voiced any? you may think you're playing bodyguard, but in reality you're the vanguard of the assault, opening a wedge for enemy forces to strike.

i was talking a couple of weeks ago abt seeing ppl tag that kristin sue lucas name-multiplied-by-one post with tags like 'this is art To Me' vel sim., and honestly i think it's a similar sort of reflex—i think exposure to the tumblr vernacular often leads people (very much including me!) to produce turns of phrase like this, that ultimately serve to convey roughly

'i, a clever girlblogger,¹ am, yeah, engaging with this frivolous hai pollai²-coded material; but my relationship to it, unlike that of most she-ple, is Intellectual and Analytical and Examined! and to make that clear, i'll be dropping in these little verbal particles from time to time, in order to distinguish my own, elevated examination of the subject from the state of risible naivete³ i'm implicitly ascribing to the other, more ordinary audience members i'm conjuring up only to instantly put down—but like, it's fine, i'm a free-and-easy girlblogger(TM), so you can't think i'd ever deliberately propagate establishmentarian prejudices! never mind the effect my rhetoric might subconsciously be having, on me or on anyone else…'

and i think this framing is worth squinting at, and worth attempting to excise from one's speech and from one's mindset, because when you get right down to it? it's just yet another insidious manifestation of respectability politics, that's gotten people to adopt it via the cuckoo-chick strategy of positioning itself as cutesy tumblr idiolect.

and like, circling back around to that fanart i mentioned at the outset: yeah, the tag did feel weirdly prosodically truncated to me without that 'actually'! but this way, if the artist ends up seeing my discussion of their work in their notes, they won't be getting slapped in the face with a wet dead fish first, so like. what's more important, you know?

⸻ ¹ ""(gender neutral)"" ² https://en.wikipedia.org/wiki/Hoi_polloi in the feminine, if i haven't totally fumbled my declensions… ³ phrasing nicked from a comment of @‍proudheron's.

[alyssamonah]

Exquisite Opulence: Embracing Modern Luxury House Design in Sydney

Sydney, a city renowned for its captivating landscapes and architectural marvels, offers many possibilities for custom home design. Creating a home that reflects your unique style, preferences, and aspirations requires the expertise of a skilled custom home designer. In this article, we will delve into the world of custom home design in Sydney, exploring the benefits of working with a professional modern luxury house design in Sydney and guiding you in choosing the perfect custom home designer to bring your vision to life.

Custom Home Design: Elevating Personal Expression: Custom home design is an art form that goes beyond conventional housing. It allows homeowners to personalize every aspect of their living space, from layout and materials to intricate design details. In Sydney, custom home designers embrace the opportunity to transform visions into reality, crafting homes that embody luxury, functionality, and individuality.

The Role of a Custom Home Designer: A custom home designer is a key collaborator in the realization of your dream home. They possess the knowledge, experience, and artistic vision to translate your ideas into architectural marvels. From conceptualization to construction, a skilled custom home designer in Sydney will work closely with you, merging aesthetics with functionality and guiding you through the entire design journey.

Factors to Consider When Selecting a Custom Home Designer: a) Design Expertise and Style: Evaluate the designer's portfolio to gauge their design sensibilities and versatility. Look for a designer whose style resonates with your vision, whether it be sleek modernism, classic elegance, or a fusion of architectural influences. b) Experience and Track Record: Research the designer's experience and previous projects to ensure they have a proven track record of delivering exceptional custom homes. Consider their ability to handle complex designs, site-specific challenges, and budget constraints. c) Client Satisfaction and Testimonials: Seek feedback from previous clients to gain insights into the designer's professionalism, communication skills, and ability to meet deadlines and exceed expectations. d) Collaboration and Communication: Effective communication and a collaborative approach are crucial for a successful custom home design project. Choose a designer who actively listens to your ideas, understands your lifestyle needs, and encourages open dialogue throughout the process. e) Quality Craftsmanship and Attention to Detail: Look for a designer who prioritizes quality craftsmanship and pays meticulous attention to detail. This ensures your custom home will be built to the highest standards, resulting in a refined and enduring living space.

The Advantages of Custom Home Design in Sydney: a) Unparalleled Personalization: Custom home design allows you to tailor every aspect of your home to your specific preferences and requirements, resulting in a truly unique and personalized living space. b) Integration of Luxurious Features: Working with a custom home designer in Sydney allows you to incorporate luxurious features and amenities that enhance your lifestyle, such as state-of-the-art technology, spa-like bathrooms, and expansive outdoor entertaining areas. c) Seamless Blend of Indoor and Outdoor Living: With Sydney's mild climate and breathtaking scenery, custom home designers can create seamless transitions between indoor and outdoor spaces, maximizing the enjoyment of the surrounding natural beauty. d) Enhanced Resale Value: A thoughtfully designed custom home that showcases quality craftsmanship and exquisite design details often commands a higher resale value in the Sydney real estate market, making it a sound long-term investment.

Conclusion: The possibilities are limitless in the realm of custom modern duplex house design. By enlisting the services of a skilled custom home designer, you can transform your dream of a luxurious, tailor-made residence into a stunning reality. With careful consideration of a designer's expertise, style, and track record, you can embark on a collaborative journey resulting in a home that truly reflects your personality and desires.

[herbofgraceandpeace]

this may be obvious, but I love how many of the characters in The Robe don’t meet Jesus or witness the events personally and instead have to evaluate the testimony of the eyewitnesses they talk to. Because, like. me too!

[nightingale-prompts]

The Phantom Midwife-DCxDP

The worst possible time to give birth is during a kidnapping/hostage situation. And unfortunately that was the current situation.

"Phantom. Did you find the hostages?" Batman said over the comm.

Phantom was on recon as always. Not everyone can just go through walls after all and Martian Manhunter wasn't always available.

"Yeah, I found them but we got a situation. A woman is in active labor and we can't move her. If I start evaluating now I'll be leaving her. And I'm not doing that." Danny said.

Danny couldn't just not do his job though but the league was busy handling the very dangerous baddies so he couldn't count on reenforcement.

"Just get them out. See what you can do to help her."

"Got it, boss."Danny said before mumbling "I should have just joined the Titans. I swear."

But something had to be done as soon as possible.

He sat beside her and helped calm her down as she cried in pain and fear over the entire situation. Suddenly an idea came to Danny.

"Excuse me, ma'am? Do you you mind if I just...grab them?" Danny asked politely as he took off his jacket.

"What?!" She tried to say calmly but a contraction hit when she opened her mouth.

"It won't hurt you or the baby but I'm gonna need to just grab them. Don't worry I'm amazing at biology. And I've had a very detailed talk about reproduction and birth. Charts and all." Danny said suddenly thankful for his mom's instance that he know the in and out of female biology.

She was right. A man should know what a woman goes through.

Danny true to his word just phased through the woman's belly and gently took the baby out on the cleanest c-section ever. The little guy was as clean as...well the day he was born.

"Uh...it's a boy?" Danny said nervously as he rubbed the newborn's back until he realized he was out now and can take a breath and cry. "Congrats he's a live one."

The group was stunned in silence as Phantom wrapped the baby in his jacket and passed him to the mother.

"Alright man I'm gonna work quickly to remove the placenta before you get toxic shock. You won't feel a thing." Danny said going back in to remove the leftover material.

Afterwards, the evacuation went perfectly.

What Danny didn't account for was the birth story of little Phan"Tom" had become a news headline. Almost every woman in the world wanted Phantom to deliver their baby because an almost painless birth sounded amazing.

Currently, the league members have a list of women who have Phantom as their midwife.

[quatregats]

Having a field day with Ellis's (1889) Existing Phonology of English Dialects discussion of Cockney, I have absolutely no experience with historical English dialectology and therefore I cannot judge the accuracy of his data, but the comments that he's collected are fascinating nonetheless:

[Image Transcription:

§ 2. Walker (1792-1807) and Smart (1836) on London Speech.

These two well-known authors of Pronouncing Dictionaries have each given a section on Cockney Pronunciation. I quote Walker from the stereotype edition of 1814. He enumerates four faults only. 1) postes, fistes, mistes, etc., for posts, fists, mists [mentioned in § 3 under P, p. 228]; 2) interchange of v, w as weal, winegar, vine, vind, for veal, vinegar, wine, wind, the two latter are spoken of as common; 3) not sounding h after w to distinguish while wile, whet wet, where were [now firmly rooted even in educated speech]; 4) interchange of h as art, harm, for heart, arm. There is no hint at pronouncing ā, ō as ī, ow.

Smart in his Hints to Cockney Speakers finds it almost unnecessary to remark on the interchange of v, w. But notes wōōld cōōld shōōld, would could should, [now never heard]; chick'n, Lat'n, nov'l, parc'l, but swivel, heaven, evil, devil, [the last of which is scarcely heard now but in the pulpit]. Other errors he notes as arethmatic, charecter, writin', readin', spīle sīle, for spoil soil, toosday, dooty, perput-rate, affinut-y, providunce, edecation; boa'rd fo'm co'd for board form cord, lawr, sawr, 'and, 'eart, honour, honest. There is no hint of sounding ā, ō as ī, ow. But he says that the ā of "a well-educated Londoner...finishes more slenderly than it begins, tapering, so to speak, towards the sound of e" (ii); and that ō "in a Londoner's mouth is not quite simple...finishing almost as oo in too." These are the ee'j, oo'w of rec. sp. which are quite different from the ī, ow sounds.

/End Transcription]

Also, and I'll just link the page scan (hopefully it works if you don't have a university library login? it's in public domain) of notes from Lackington's 1817 list of London mispronunciations but there's the glorious note on "leeftenant pronounced levtenant [leftenant, now usual]", which really makes you think. Anyways, I just find the historical evolution of Cockney really interesting, because it's an accent that has a very clear stereotyped version for lots of English speakers today, but a lot of those features came about in the mid-to-late 19th century, and it's fascinating to think that what was a defining feature of the dialect (like the interchange of w/v) has just completely disappeared off the map, while the distinct vowels were just not a thing at all. Really goes to show how fast spoken language evolves, especially outside of the standard, and we love to see it <3

[rt8815]

Same

[futureelctronic1175]

NXP - Getting Started with NXP i.MX 93 EVK Evaluation Kit

https://www.futureelectronics.com/resources/featured-products/nxp-imx-93-evaluation-kit . In this video, you'll learn how to set up NXP's i.MX 93 EVK. Development kit contains: i.MX 93 EVK board, Power Supply: USB Type C 45W Power Delivery Supply, A supported Cable: Assembly, USB 2.0 , Type-C Male to Type-A Male, Software: Linux BSP image Programmed in eMMC and a Quick Start Guide. https://youtu.be/nGdCfwjl0sI

[futureelectronic1527]

NXP - Getting Started with NXP i.MX 93 EVK Evaluation Kit

https://www.futureelectronics.com/resources/featured-products/nxp-imx-93-evaluation-kit . In this video, you'll learn how to set up NXP's i.MX 93 EVK. Development kit contains: i.MX 93 EVK board, Power Supply: USB Type C 45W Power Delivery Supply, A supported Cable: Assembly, USB 2.0 , Type-C Male to Type-A Male, Software: Linux BSP image Programmed in eMMC and a Quick Start Guide. https://youtu.be/nGdCfwjl0sI

[hypocratic]

047 - cullen

Frederick remains in the corner of the stuck elevator, resting his weight on his right leg—his good side (ambulatorily speaking (aesthetically, he favors his left))—gripping the handrail that wraps around the three walls for further relief.

The other man is distressed. Validly, unpleasantly so. Frederick makes no true effort to soothe him. That would be a waste. The man will be too tired to be scared in a matter of minutes. Frederick can wait it out. Still, an interruption may hasten that process.

Before the man screams again: "Breathe. What you are currently experiencing is a panic attack. Shortness of breath, accelerated heart rate, fear of dying. All symptoms. Lucky for you— us— panic has an incredibly short lifespan. It is an exhaustive feeling. Overly taxing on the human body. You will calm soon, you will have no choice in the matter." He pauses, briefly, musing. "Whether fatigue can be equated to calmness is more of a philosophical discussion. Something we may have ample time for, it seems, given ourrr... predicament."