#mvcc

[dynamiccables01]

Features of MVCC Insulated Conductor

The Medium Voltage Covered Conductor (MVCC) is a sustainable option for overhead electrical lines, especially in regions where animal welfare is an issue. The MVCC was created to lessen the possibility of deadly accidents and safeguard wildlife from electrocution. Environmentally friendly, UV-protected, and non-tracking materials like HDPE and XLPE are used in its construction. There has been a notable decrease in wildlife electrocution deaths linked to the deployment of MVCC. Reduced phase distances are another benefit of using covered conductors, which makes the lines more compact and resistant to conductor clashing and tree bending. Additionally, using covered conductors has shown to be a viable way to mitigate the effects of inclement weather while maintaining a steady supply of energy and minimising environmental damage. One of the green energy efforts in the power transmission and distribution sector that aims to promote environmental sustainability and reduce pollution is the adoption of covered conductors.

The MVCC was created to lessen the possibility of deadly accidents and safeguard wildlife from electrocution. Environmentally friendly, UV-protected, and non-tracking materials like HDPE and XLPE are used in its construction. There has been a notable decrease in wildlife electrocution deaths linked to the deployment of MVCC. Reduced phase distances are another benefit of using covered conductors, which makes the lines more compact and resistant to conductor clashing and tree bending.

Additionally, using covered conductors has shown to be a viable way to mitigate the effects of inclement weather while maintaining a steady supply of energy and minimising environmental damage. One of the green energy efforts in the power transmission and distribution sector that aims to promote environmental sustainability and reduce pollution is the adoption of covered conductors.

[allatonceness]

100 Conferences

Belém Lima 

Luisa Penha 

Rui Neto 

Bartolomeu costa Cabral 

João Paulo rapagão 

Cristina Guedes 

Carlos Castanheira

Jean Pierre Porcher 

Troy Howie 

João Pedro Serôdio

Gil PitA Penumbra 

Carlos Lobo 

João Mendes Ribeiro 

MVCC

Alexandre Alves Costa 

Francisco Providência 

Zalraa zawcwi 

Nuno Senos 

Arquitectos anónimos 

Eduardo Aires 

Andre Tavares 

Go Hasegawa 

Jean phillipe Vassal 

Manuel Graça Dias 

ESM 

Nadia Tolonikva 

Sou Fujimoto 

Frances Kéré 

Maurizio Lanzarato 

Santiago Cirugeda 

Eva Franch 

Ali cherri 

Pankay Mishra 

Hans Ulrich Obrist

Kazuo Sejima

Guido Beltrami 

Josep Quetglas 

Inês Lobo 

Nuno Brandão Costa 

Made in 

Nieto Sobrejano 

Dominique Perrault 

ESM 

Camilo Rebelo 

Tony Fretton 

Roger Diener 

Go hasengawa + Office KGDVS 

 SAMI

Pascal Flammmer 

De Vylder 

Arq. G 

Barbas lopes 

Nuno Brandão Costa 

Norland 

E2A

Arno Brandhuber 

Valerio Olgiati

Pascal Flammmer 

Norland 

E2A

Arno Brandhuber 

Valerio Olgiati 

Humberto Napolitano 

Rui Furtado + Ricardo Bak Gordon 

Job Floris 

Charllote Von Moos 

Stephen Taylor 

Barão Hunter + Girão Lima 

Madelon Von Vriesendrop 

Alvaro Siza 

Francesca Torzo

Manuel Mendes 

Madelon Von Vriensendrop 

Richard Wentworth 

Thomas Thaites 

Assemble 

Benjamin Seroussi 

Iris Rogoff

Olivier Marboeuf 

Aires Mateus + Fernanda Fragaterio 

Alejandro Aravena

Peter Markli 

Nuno grande + Adriana Calcanhoto 

Sergison Bates 

Eric lapierre 

Thomas Daniel 

Tim Benton 

Paul Owen 

Rick Joy 

Juhami Pallasmaa 

João Luis Carrilho da Graça 

ESM+ NBC+ Luis Ferreira Alves 

Bernando pinto de almeida + JM + Nuno Lacerda Lopes 

Eduardo Souto Moura

SPBR Arq+ NBC 

Morrettin arq. + Mapa arq.+ Cristina Guedes 

Arq associados + Laboratório de projectos da FAUUSP

Metro arq. + MMBB + ÁLVARO Puntoni 

Vijitha Basmayaka + Guilherme Wisnik 

Camilo rebelo + João Mendes Ribeiro + Alexandre Dias 

Ricardo Carvalho + NBC

101.Marina Tabassum + Inês lobo

Steven Holl 

Ruy Nishizawa

Joan Oackman 

Joan Oackman 

Tom Avermaete 

[kazifatagar]

Malaysia’s Vape Bans Spark Calls for Balanced Regulation Over Prohibition

In Malaysia, state-level vape bans are sparking concerns from the Malaysian Vape Chamber of Commerce (MVCC) and Consumer Choice Centre (CCC) Malaysia. They warn that outright prohibitions, like those under the Control of Smoking Products for Public Health Act 2024, risk driving vaping underground, boosting black markets, and threatening public health. Advocating for stricter enforcement of…

[dynamiccableslimited]

Dynamic Cables' Medium Voltage Covered Conductors: Superior Safety and Reliability up to 36kV

Dynamic Cables Limited offers Medium Voltage Covered Conductors (MVCC) designed to enhance the reliability of electricity distribution systems. These conductors, insulated with high-quality materials, provide protection against accidental contacts, reducing power interruptions and outages. Suitable for voltage ratings between 6.6kV to 33kV, MVCCs are ideal for challenging environments, ensuring reduced maintenance costs and improved performance under adverse weather conditions.

[pvccompoundsworld]

Shakun Polymers, a part of Alphagary (an Orbia business), brings innovative MVCC solutions for enhanced performance, safety, and durability.

🔹 Thermoplastic Semi-Conductive Shielding Compounds for MVCC - SP-PESC-11 ✅ Good mechanical properties ✅ Exceptional heat resistance ✅ Excellent thermal stress crack resistance ✅ Strong toughness & easy processability ✅ Low volume resistivity

🔹 PE Sheathing for MVCC ✅ Superior anti-tracking ability (3.5kV for 6 hours) ✅ UV resistant & outstanding weather durability ✅ Environment Stress Crack Resistant (ESCR) ✅ High processability with multiple extruder compatibility

Upgrade your MVCC applications with Shakun’s high-performance polymer solutions!

[gabicna]

End Up Being a Certified Nursing Assistant: Top CNA Training Programs in Utica, NY

Become a Certified Nursing assistant: Top ​CNA Training Programs in Utica, NY

Become a Certified Nursing Assistant: Top CNA Training Programs in Utica, NY

Are you looking to start a rewarding career in healthcare?⁢ Becoming a Certified Nursing Assistant (CNA) is an‍ excellent way to enter the ​medical field. With a‍ growing demand​ for healthcare⁢ professionals,CNA roles are becoming increasingly crucial,especially⁤ in regions like Utica,NY. This⁤ guide explores how⁤ you can become ‍a CNA​ and highlights the top training ‌programs⁣ available in‍ the ‌Utica area.

Understanding ‌the ⁢Role of a ⁤Certified Nursing Assistant

A Certified Nursing Assistant provides essential ⁣care to patients in various healthcare‍ settings, ⁤such as hospitals, ⁤nursing ‍homes, and home ​health ​care. ⁣CNAs are⁢ vital in helping⁤ patients with daily activities,monitoring vital signs,and‌ assisting nurses⁣ in patient care. With a compassionate nature and a dedication ⁤to‌ helping others, a CNA can make a notable difference in the ‌lives of patients.

Benefits of ‌Becoming a Certified Nursing Assistant

Choosing ​to become a CNA offers numerous​ benefits, including:

Job⁤ Stability: The healthcare industry continues to grow, ‌leading⁣ to high demand for CNAs.

Flexible Hours: many CNA ‌positions offer shift options, allowing for a ​better work-life balance.

Foundation for Advanced Careers: Experience as a CNA can lead to further opportunities in nursing and other healthcare roles.

Personal Fulfillment: helping patients and improving their quality of ‍life‍ can be incredibly rewarding.

How to Become a Certified nursing Assistant in Utica, ‍NY

The path to becoming a CNA in ⁣Utica involves a few ​crucial steps:

Complete⁢ a ⁣CNA Training Program: Enroll in a state-approved training program ⁣that meets New YorkS educational requirements.

Pass the CNA Certification Exam: After completing your training, you must pass ⁢the exam to receive your certification.

Register with the New York Nurse ⁢Aide Registry: ⁢ Become officially ⁢recognized as⁢ a CNA in New York State.

Top CNA‌ Training Programs ⁣in Utica, NY

There are several reputable CNA training programs in Utica. ‍Below are‌ some of the⁢ top options you can‍ consider:

Program Name

Provider

Location

Duration

Online Options

Oneida-Herkimer-Madison BOCES

BOCES

New ⁢Hartford, NY

8 weeks

No

Mohawk Valley‍ Community College

MVCC

Utica, NY

6-8 weeks

Yes

CareGivers ‌America

CareGivers

Utica, NY

4�� weeks

No

Herkimer College

Herkimer CC

Herkimer, NY

5 weeks

No

What to Expect During CNA Training

CNA training ⁢programs typically involve a ​mix of ⁤classroom instruction and hands-on clinical practice. Here’s what⁤ you can expect:

Classroom Learning: Topics covered may include basic anatomy, infection ‌control, patient care ‍procedures, ‌and dialog skills.

Hands-On Training: Students practice skills in a supervised environment, frequently enough in labs or healthcare facilities.

Clinical Experience: Many programs include supervised clinical placements,‍ allowing ⁣students to apply their⁣ knowledge⁢ in‍ real-world settings.

Real-Life Experiences:‍ Why Become⁤ a CNA?

To illustrate the impact of being a CNA, we spoke to Sarah, a⁣ recent graduate of a⁣ CNA training program in utica. She shared​ her⁣ journey:

“I always ‍knew I wanted to work in healthcare, but I wasn’t sure ⁢where I ⁢fit in.After becoming a CNA, I not only gained valuable skills but also ‌found my passion in ⁢caring for the elderly. I appreciate the⁢ personal connections I ⁤build ⁣with my patients every day!”

Tips for success in Your CNA Career

Here are some practical‌ tips to ensure ⁤a‌ prosperous career as a CNA:

Stay Organized: ​ Managing patient paperwork and ⁣care schedules⁢ is essential for ⁣providing quality care.

Communicate Effectively: Develop strong communication skills, as they⁢ are crucial in working with patients and the healthcare team.

Prioritize ‌Patient ‌Care: Remember that patient⁣ safety ‍and well-being‌ come first in all ⁣situations.

seek ⁣Further Education: Consider continuing your education to advance your career, such as ‌becoming⁣ an ⁢LPN or RN.

Conclusion

Becoming a Certified Nursing Assistant is a ‌rewarding career choice‍ for those looking to make a meaningful impact ⁢in the healthcare⁣ industry. ⁤With⁢ various training programs in Utica, ⁢NY, ⁣you can find the right fit for your educational and ⁤professional goals. By following the right steps and‌ completing a training program, you⁤ can embark on a fulfilling journey as a ‍CNA. Start today and take the first‍ step ⁣toward a brighter future in healthcare!

https://cnatrainingprogram.net/end-up-being-a-certified-nursing-assistant-top-cna-training-programs-in-utica-ny/

[helicalinsight]

Firebird to PostgreSQL Migration

In this article, we dive deep into the process of Firebird to PostgreSQL Migration, exploring the key steps and considerations to ensure a seamless transition. We cover essential topics such as data compatibility, schema conversion, and handling differences in SQL syntax between the two databases. With a focus on best practices and tools that streamline the migration process, this guide will help organizations move their data efficiently while minimizing downtime. Additionally, we discuss common challenges and provide solutions to overcome them, ensuring a smooth and successful migration experience.

What is Firebird

Firebird is an open-source relational database management system (RDBMS) known for its lightweight architecture, high performance, and scalability. It supports SQL, transactions, and multi-version concurrency control (MVCC), making it ideal for embedded applications and small to medium-sized projects. Firebird is compatible with a variety of platforms, including Windows, Linux, and macOS. Its flexibility allows developers to create efficient, low-cost solutions without sacrificing reliability or speed. Despite its smaller footprint compared to larger databases, Firebird offers powerful features, such as stored procedures and triggers, making it a versatile choice for many use cases.

What is PostgreSQL

PostgreSQL is an advanced, open-source relational database management system (RDBMS) known for its robustness, flexibility, and support for complex queries. Widely admired for its strong adherence to SQL standards, PostgreSQL goes beyond basic functionality, offering powerful features like multi-version concurrency control (MVCC), extensibility, and support for unstructured data types. It's a go-to choice for developers and organizations handling large-scale, high-performance applications. Whether you're building a web app, managing big data, or running analytics workloads, PostgreSQL is a trusted platform for its reliability, security, and active community of contributors, making it a leader in the world of open-source databases.

Advantages of Firebird to PostgreSQL Migration

Improved Performance: PostgreSQL offers better performance with support for larger datasets and complex queries.

Advanced Features: PostgreSQL provides advanced features like JSONB support, full-text search, and foreign data wrappers.

Scalability: PostgreSQL scales efficiently to handle high traffic applications and large volumes of data.

Stronger Security: PostgreSQL has robust security mechanisms, including encryption and fine-grained access control.

Active Community Support: PostgreSQL has a large, active community that ensures regular updates and bug fixes.

Cross-Platform Compatibility: PostgreSQL supports a wide range of operating systems, including Windows, Linux, and macOS.

SQL Compliance: PostgreSQL adheres strictly to SQL standards, reducing potential issues during migration.

Extensibility: With support for custom extensions, PostgreSQL allows businesses to tailor the database to their specific needs.

Better Documentation: PostgreSQL provides extensive, well-organized documentation, easing development and troubleshooting.

Method 1: Migrating Data from Firebird to PostgreSQL Using the Manual Method

Schema Analysis and Preparation: Analyze the Firebird schema, identifying tables, views, and stored procedures to be migrated, and prepare a corresponding schema in PostgreSQL.

Data Export: Use Firebird’s gbak utility or export data to CSV files for easy import into PostgreSQL.

Schema Creation in PostgreSQL: Manually create the PostgreSQL schema, mapping tables, data types, and relationships from Firebird to PostgreSQL.

Data Import: Use PostgreSQL’s COPY command or pgAdmin to import the data from the exported CSV files.

Stored Procedures and Application Updates: Convert Firebird-specific stored procedures to PostgreSQL’s PL/pgSQL, and update applications to connect to the new PostgreSQL database.

Testing and Optimization: Test the migration thoroughly, ensuring data integrity and application functionality, then optimize performance for PostgreSQL.

Disadvantages of Migrating Data from Firebird to PostgreSQL Using the Manual Method

High Error Risk: Manual migration increases the likelihood of human errors, affecting data integrity and process accuracy.

Complex Data Transformation: Achieving complex data transformations without automation can lead to inconsistencies and errors.

Dependency on Technical Resources: Skilled resources are essential, making the process time-consuming and costly.

Lack of Automation: The entire process requires manual effort, from data extraction to schema conversion, which is inefficient.

Limited Scalability: Manual methods become increasingly difficult to scale as data volume and complexity grow.

No Automated Error Handling or Notifications: Without automation, errors go undetected, causing potential delays or data loss.

No Automated Rollback Mechanism: In the event of a failure, there’s no automatic rollback, complicating recovery and increasing downtime.

Lack of Monitoring Tools: Without automated logs, tracking data transfer progress and ensuring completeness is challenging.

Inability to Handle Incremental Loads: Manual migration lacks automated methods for incremental data loading, complicating ongoing synchronization.

Method 2: Migrating Data from Firebird to PostgreSQL Using ETL Tools

There are certain advantages in case if you use an ETL tool to migrate the data

Automation of Data Migration: ETL tools automate the entire migration process, reducing human error and saving time.

Simplified Schema Mapping: Built-in connectors and functions handle schema differences between Firebird and PostgreSQL seamlessly.

Incremental Data Loads: ETL tools allow for scheduled data loads and incremental updates to keep migration continuous and up-to-date.

Real-Time Monitoring: ETL tools provide dashboards to track progress and alert users to any migration issues.

Scalability: ETL tools scale easily to handle large data volumes, ensuring consistent performance without manual intervention.

Inbuilt Error Handling and Notifications: These tools include automated error handling, logging, and email notifications for efficient issue resolution.

Comprehensive Monitoring and Analytics: ETL tools monitor key stats like data transfer volumes, data quality (DQ), and change data capture (CDC).

Need to do this activity again and again for every table.

Challenges of Using ETL Tools for Data Migration

Complex Setup: ETL tools require intricate configuration, making the initial setup time-consuming and technically demanding.

Data Transformation Issues: Handling complex data transformations and schema differences can be difficult and often requires custom scripting.

Performance Limitations: ETL tools may struggle with large datasets or high-velocity data streams, leading to slower performance.

Cost Considerations: Many ETL tools come with high licensing costs, which can strain budgets, especially for smaller organizations.

Dependency on Third-Party Tools: ETL tools often depend on external services, creating risks around compatibility and vendor support during migration.

Why Ask On Data is the Best Tool for Migrating Data from Firebird to Oracle

User-Friendly Interface: Ask On Data offers an intuitive interface that simplifies the migration process, making it easy for users of all skill levels.

Seamless Integration: The tool connects smoothly with both Firebird and Oracle, ensuring a hassle-free data transfer without complicated setups.

Automated Data Transformation: It automatically transforms and cleans your data, reducing the risk of errors and saving you time during migration.

Real-Time Monitoring: Ask On Data provides real-time monitoring of the migration process, allowing you to track progress and quickly address any issues.

Cost-Effective Solution: With a flexible pricing model, Ask On Data helps you manage migration costs without sacrificing quality or performance.

Usage of Ask On Data : A chat based AI powered Data Engineering Tool

Ask On Data is world’s first chat based AI powered data engineering tool. It is present as a free open source version as well as paid version. In free open source version, you can download from Github and deploy on your own servers, whereas with enterprise version, you can use Ask On Data as a managed service.

Advantages of using Ask On Data

Built using advanced AI and LLM, hence there is no learning curve.

Simply type and you can do the required transformations like cleaning, wrangling, transformations and loading

No dependence on technical resources

Super fast to implement (at the speed of typing)

No technical knowledge required to use

Below are the steps to do the data migration activity

Step 1: Connect to Firebird(which acts as source)

Step 2 : Connect to PostgreSQL (which acts as target)

Step 3: Create a new job. Select your source (Firebird) and select which all tables you would like to migrate.

Step 4 (OPTIONAL): If you would like to do any other tasks like data type conversion, data cleaning, transformations, calculations those also you can instruct to do in natural English. NO knowledge of SQL or python or spark etc required.

Step 5: Orchestrate/schedule this. While scheduling you can run it as one time load, or change data capture or truncate and load etc.

For more advanced users, Ask On Data is also providing options to write SQL, edit YAML, write PySpark code etc.

There are other functionalities like error logging, notifications, monitoring, logs etc which can provide more information like the amount of data transferred, logs, any error information if the job did not run and other kind of monitoring information etc.

Trying Ask On Data

You can reach out to us on mailto:support@askondata.com for a demo, POC, discussion and further pricing information. You can make use of our managed services or you can also download and install on your own servers our community edition from Github.

[transeletric]

Raychem medium voltage line cover

What is the importance of the Raychem medium voltage line cover?

Raychem MVLC provides state-of-the-art insulation that prevents power outages caused by trees and civil structures coming into contact with power lines. It can be selectively applied to problem areas such as power distribution lines too close to civil structures, areas prone to cyclones and natural disasters, and forests. Industrial from cross-linked materials, Raychem medium voltage line cover forms an enormously robust insulation system, confirming reliable operation even in the exacting environments for years.

Raychem MVLC covers can be selectively applied to problematic stretches to avoid costly conductor replacements. It can be installed on live lines with an MVLC that attaches directly to the overhead conductor and remains still in one place. This tool can be operated manually or automatically using a power drill. This tool rapidly and continuously forms, closes and feeds MVLC covers along conductors. Raychem MVLC allows quick installation on short conductor lengths, especially in substations.

Power Outage Prevention

MVLC line covers provide state-of-the-art insulation that prevents trees and wildlife from contacting power lines and causing power outages.

Cost Effective

Raychem MVLC covers are designed to insulate existing bare wires without expensive conductor replacement costs or additional line hardware. Raychem MVLC can be selectively applied to challenging locations with temperatures above 0˚C.

Consistent Installation Under Energized Conditions

Tyco Electronics has designed a special tool to apply MVLC covers quickly and reliably. This tool can be applied to live lines. Attach directly to overhead conductors and secure them in one location on each span. This tool can be operated manually or automatically. Use a hand crank or use a gas-powered drill. This tool builds, closes and feeds Raychem MVLC covers along conductors quickly and consistently. MVLC allow for quick installation on short lengths of conductors, especially in substations.

High Voltage Materials

The Raychem MVLC cover material construction is based on Electronics' field-proven experience with Raychem products for HV products in harsh environments. Raychem MVLC materials are UV-stable and resistant to cracking and erosion. Raychem MVLC covers are cross-linked to form an enormously robust insulation system, confirming years of reliable action even in the toughest environments.

Conclusion Raychem medium voltage line cover provides high-quality electrical insulation for electrical substation leads and jumpers. These covers are made from non-tracking silicone material and are suitable for harsh, medium-voltage outdoor environments. Raychem MVCC covers come in sections for easy installation. Buy Raychem MVLC online from Transeletric now.

[vapehk1]

Exploring 2024's Leading Vape Brands in Emerging Global Markets: Insights & Trends

As the global vaping industry continues to evolve and adapt to regulatory frameworks, the trends toward standardization and branding are unmistakable. In regions such as the Middle East, Southeast Asia, Australasia, South America, and Russia, the vape market is experiencing robust growth. Brands are eagerly expanding into these emerging markets to secure a strong foothold. This analysis, based on field research data, offers an overview of the top-selling vape brands in these burgeoning markets for 2024, providing valuable insights for industry stakeholders. Southeast Asia: A Market of Growing Potential The Rapid Growth of the Vape Market - Population and Market Size: Southeast Asia is notable for its large population and generally positive regulatory attitude towards vaping. The market is on a significant upward trajectory, showing immense potential. - Sales Figures: According to the Malaysian Vape Chamber of Commerce (MVCC), Malaysia's retail vape market grew by 53% from 2019 to 2023, reaching nearly 3.5 billion Malaysian ringgit. The number of adult vape users in Malaysia increased by 27% during this period, with disposable vapes capturing 32% of the market share. Major Export Markets: - China's Exports: Malaysia and the Philippines rank as significant export markets for Chinese vape products, with increases of 22.61% and 146.91% respectively in 2023. Popular Brands in Southeast Asia: - Malaysia: Sp2s, Quik, Voltbar, Aladdin - Philippines: Falva, Rimmo, Geekbar, OXVA Middle East: The Rise of Vaping Amid Traditional Tobacco Use The Middle East has seen accelerated steps toward the legalization and commercialization of vaping. Countries like Kuwait, Saudi Arabia, UAE, Bahrain, and Egypt are emerging as vibrant new markets for vapes, partly due to the traditional prevalence of smoking hookahs. Leading Brands in the Middle East: - Disposable Vapes: VGOD, YUOTO, TUGBOAT - Open System Vapes: VOOPOO, LOST VAPE, VEIIK, NASTY, ASPIRE, UWELL, SMOK Australasia: Navigating Through Regulatory Reforms In response to new regulatory measures, Australia has banned the import of disposable vapes and certain refillable non-therapeutic vapes starting January 1, 2024. These restrictions significantly impact the market landscape. Top Performing Brands: - Established Market Leaders: VAPO, TAKI, ALT - Emerging Favorites: HQD, IGET, OKK South America: A Market on the Rise South America's vape market is experiencing notable growth, driven by increasing consumer acceptance and continuous product innovation. The varying policy landscape across countries affects the pace of market development. Hot Brands in South America: - Local Brands: IGNITE, NIKBAR, ZOMO, BLACK SHEEP - International Presence: VUSE, FUME, ELFBAR, GEEKBAR, VAPORESSO, OXBAR Russia: Regulatory Changes Shaping the Market The implementation of new amendments to tobacco control laws in Russia has formalized the regulation of the vaping industry, fostering a healthier and more orderly market development. Popular Brands in Russia: - Disposable Vapes: RINCOE, ELFBAR, WAKA, PUFFMI - Open System Vapes: VOOPOO, UWELL, RINCOE Conclusion Vape brands are carving out significant niches in these emerging markets through diverse product strategies, marketing approaches, and distribution networks. As regulations solidify and competition intensifies, brands must focus on compliance, quality enhancement, and understanding market shifts to maintain their competitive edge and market position. Explore the World of Vaping! Dive into the dynamic and evolving markets of the world. Discover top brands and embrace the future of vaping, tailored to meet your tastes and standards. Read the full article

[edchart]

CouchDB Certification Exam Free Test - By EDCHART free Online

CouchDB is a document-oriented NoSQL database that stores data in JSON-like documents with a flexible schema. It provides a distributed architecture, allowing seamless scalability and fault tolerance. CouchDB's key features include multi-version concurrency control (MVCC), HTTP/RESTful API, and a MapReduce engine for querying data.

[govindhtech]

What is AlloyDB for PostgreSQL?

Google Cloud’s next-generation managed PostgreSQL service, AlloyDB, handles cloud-scale operational and analytical workloads. Autopilot features like memory management and adaptive autovacuum let it self-update and adjust. This blog discusses how AlloyDB’s adaptive autovacuum technology optimizes PostgreSQL VACUUM and executes the procedure efficiently.

Multi Version Concurrency Control (MVCC) in PostgreSQL allows many transactions to run concurrently without blocking each other by producing various row versions. Each row has numerous variations, each representing a distinct historical period. Each transaction in MVCC has a unique Transaction ID (XID) that indicates its execution order. MVCC in PostgreSQL creates two concerns.

1. Transaction ID wraparound: PostgreSQL XIDs are 32-bit unsigned numbers issued to each transaction and increased. Data corruption may occur when they reach their maximum value and wrap around to zero, like a ring buffer.

2. Bloat: Tables, indexes, and system catalogs accumulate outdated data. This affects database performance over time because the query planner’s accuracy is affected and read operations must traverse through more pages.

The VACUUM procedure in PostgreSQL addresses these difficulties. Manually scanning tables removes dormant tuples and updates statistics. PostgreSQL users define AUTOVACUUM, an autonomous background process that triggers VACUUM depending on parameters like autovacuum_vacuum_cost_limit, delay, page_hit, page_miss, and page_dirty.

However, PostgreSQL AUTOVACUUM has certain drawbacks:

The default autovacuum settings may not work for all workloads. Finding the best database and table configurations might be difficult.

The autovacuum operation might be annoying on busy systems. Autovacuum might slow performance if not enabled or handled appropriately.

Cost, vacuum worker operations, and memory are fixed in the autovacuum. It cannot automatically adapt vacuum workload to customer and resource demands.

For databases with high transaction rates, when the VACUUM process cannot keep up, open XIDs might grow, causing XID wrap-around and protracted system downtime.

Laggard vacuum may also inflate table space with dead tuples and index entries. This wastes storage, slowing backups and restores. It also impacts query performance.

Autovacuum parameters must be changed to match workload to prevent availability and performance concerns. If workload fluctuates often, vacuum settings might be difficult to adapt.

AlloyDB adaptive autovacuum

AlloyDB for PostgreSQL handles mission-critical operational and analytical demands. Autovacuum settings are hard to manually modify with large and dynamic workloads. AlloyDB’s adaptive autovacuum modifies vacuuming frequency and evaluates operations depending on database demand. This keeps the database operating at top performance even when workload varies without vacuum process disruption. The adaptive autovacuum aims of AlloyDB are:

Maintain stable application transactional performance

Keep system availability high by preventing XID wraparound.

Free DBAs from manually tweaking workload parameters with hands-off vacuum tuning.

Autovacuum settings changed by users are honored and adaptive settings adjusted appropriately.

AlloyDB’s adaptive autovacuum mechanism continuously adjusts PostgreSQL autovacuum parameter settings. By setting autovacuum_max_workers, several workers may operate on distinct tables. Each autovacuum worker uses work memory defined by maintenance_work_mem. AlloyDB dynamically modifies these properties.

The adaptive autovacuum works how?

AlloyDB Adaptive autovacuum analyzes operations and vacuuming frequency based on many factors:

Database size

Number of database dead tuples

Database data age

Transactions per second versus. anticipated vacuum speed

The adaptive autovacuum enhancements and automatically modified parameters in AlloyDB are:

1.Dynamic vacuum resource management: AlloyDB adjusts vacuum workers based on real-time resource information rather than a cost restriction. In busy systems, vacuum process and resources are throttled. If memory is available, vacuum workers get more memory to speed index vacuum.

2. Dynamic XID Throttling: AlloyDB continually checks vacuuming and XID use. If XID wraparound is detected, AlloyDB will slowly delay transactions to control XID usage. It gives vacuuming additional resources to catch up and return to the safe zone. Transactions per second will decrease until XIDs reach the safe zone. Vacuum workers grow dynamically with XID age.

3.Efficient vacuuming for bigger tables: The default vacuum uses table-specific statistics from pg_stat_all_tables with the dead tuple ratio. Small tables benefit from that, while bigger, often updated tables may not. The improved scan method in AlloyDB triggers the autovacuum more frequently to scan sections of huge tables and eliminate dead tuples faster.

4. Log warning messages: AlloyDB detects vacuum blocks such long-running transactions, orphaned prepared transactions, orphaned replication slots, etc., and reports warnings in PostgreSQL logs so users may solve problems quickly.

“Found a backend process XXX with a long-running transaction whose transaction id age exceeds the transaction age threshold.”

Found an old prepared transaction XXX whose transaction id age is more than or equal to the transaction age threshold, database oid: XXX, owner oid: XXX”

“Found a replication slot XXX whose min transaction id age is greater than or equal to the threshold.”

For AlloyDB, allow adaptive autovacuum by default. To deactivate or enable it afterwards, use the option enable_google_adaptive_autovacuum.

Advantages of AlloyDB adaptive autovacuum

AlloyDB adaptive autovacuum adjusts the vacuum process depending on workload resource consumption without human tuning. Autovacuum parameters may be adjusted, and AlloyDB will respect them.

Benefits of adaptive autovacuum include:

Performance boost: Adaptive autovacuum removes bloat to keep the database working smoothly as workload changes.

Reduced maintenance: Adaptive autovacuum automatically changes vacuuming frequency and analyzes operations, reducing maintenance.

Improved availability: Adaptive autovacuum prevents XID wraparound, preventing database failures and improving availability.

Enabling Adaptive Autovacuum in AlloyDB benchmarking tests on 64vCPU SKU with 100% cached TPC-C runs reduced Frozen XID age from ~1.5B to ~1B and dead tuples count from ~1.2B to 0.7B, allowing the database to perform optimally over longer periods.

Conclusion

Adaptive autovacuum automates the vacuum process and improves AlloyDB database speed and availability. Allow adaptive autovacuum today if you haven’t.

[swagpaperuniversitymoney]

http://dlvr.it/StMdPq

[gslin]

SQLite 的 HC-tree 計畫

Hacker News 首頁上看到的新計畫：「HC-tree is an experimental high-concurrency database back end for SQLite (sqlite.org)」，SQLite 弄了一個實驗性質的 backend，叫做 HC-tree： The HC-tree (hctree) project is an attempt to develop a new database backend that improves upon regular SQLite as follows: 他列了幾個重點，其中「Improved concurrency」這點題到了可以讓多個 writer 同時寫入運作，這點算是 SQLite 很大的改變，目前希望可以做到在 single-threaded 情況下不輸現有的 SQLite： An implicit…

[huling]

👑#protectivestyles #mvcc #blackandwhite #class https://www.instagram.com/p/Bq8ZKvpHsFUMIJQeF8vqCFyi5AHkXy44KU7Iyg0/?utm_source=ig_tumblr_share&igshid=1ins17ttk20bk