Informatyka
Poradnik dla dozoru i elektromonterów zdających egzamin kwalifikacyjny URE Grupy G1
Stanisław Paciorek
Przygotuj się dobrze i uzyskaj potwierdzenie swoich uprawnień Poradnik jest przeznaczony dla pracowników dozoru i elektromonterów pracujących w różnych branżach ― w tym w kopalniach i zakładach energetycznych ― przygotowujących się do egzaminu kwalifikacyjnego URE Grupy G1. Certyfikat ten jest zwykle wymagany od osób, które zajmują się eksploatacją urządzeń elektroenergetycznych w przedsiębiorstwach lub wykonują usługi na rzecz innych podmiotów i osób fizycznych. Podręcznik omawia w zakresie podstawowym problematykę regulowaną przepisami wydanymi na podstawie Kodeksu pracy, Prawa energetycznego i Prawa budowlanego. Dotyka także zagadnień wynikających z przepisów wydanych na podstawie Prawa geologicznego i górniczego. Książka zawiera przykładowe pytania, które mogą zostać zadane podczas egzaminu, wraz z odpowiedziami. Zdany egzamin pozwala uzyskać świadectwo kwalifikacyjne, uprawniające do samodzielnego wykonywania prac eksploatacyjnych przy urządzeniach elektroenergetycznych na stanowiskach dozoru i eksploatacji grupy G1.
Poradnik dla dozoru i elektromonterów zdających egzamin kwalifikacyjny URE Grupy G1. Wydanie II
Stanisław Paciorek
Z tym poradnikiem przygotujesz się do egzaminu potwierdzającego Twoje kwalifikacje Jeżeli jesteś pracownikiem dozoru lub elektromonterem albo po ukończeniu nauki planujesz zajmować się eksploatacją urządzeń elektroenergetycznych u pracodawcy lub w ramach własnej działalności, musisz posiadać odpowiednie kwalifikacje. Świadectwa kwalifikacyjne uprawniające Cię do samodzielnej eksploatacji urządzeń elektroenergetycznych "E" lub sprawowania dozoru nad ich eksploatacją "D" możesz uzyskać po pozytywnym zdaniu egzaminu kwalifikacyjnego URE Grupy 1. Ta książka ma za zadanie pomóc Ci się do niego przygotować. Poradnik zawiera materiał wspomagający proces przygotowania osób dozoru i elektromonterów do egzaminu kwalifikacyjnego. Omawia problematykę regulowaną przepisami Kodeksu pracy, Prawa energetycznego i Prawa budowlanego, a także kwestie wynikające z Prawa geologicznego i górniczego. Znajdziesz tu również przykładowe pytania, jakich możesz się spodziewać w trakcie egzaminu, wraz z odpowiedziami. Wydanie drugie zostało uaktualnione pod kątem prawnym, dodano do niego ponadto nowe treści z zakresu elektrotermii i elektrolizy, fotowoltaiki, magazynowania energii i trakcji elektrycznej.
Enrico Pirozzi
PostgreSQL database servers have a common set of problems that they encounter as their usage gets heavier and requirements get more demanding. Peek into the future of your PostgreSQL 10 database's problems today. Know the warning signs to look for and how to avoid the most common issues before they even happen.Surprisingly, most PostgreSQL database applications evolve in the same way—choose the right hardware, tune the operating system and server memory use, optimize queries against the database and CPUs with the right indexes, and monitor every layer, from hardware to queries, using tools from inside and outside PostgreSQL. Also, using monitoring insight, PostgreSQL database applications continuously rework the design andconfiguration. On reaching the limits of a single server, they break things up; connection pooling, caching, partitioning, replication, and parallel queries can all help handle increasing database workloads.By the end of this book, you will have all the knowledge you need to design, run, and manage your PostgreSQL solution while ensuring high performance and high availability
Luca Ferrari
PostgreSQL is a rock-solid, scalable, and safe enterprise-level relational database. With a broad range of features and stability, it is ever increasing in popularity.This book shows you how to take advantage of PostgreSQL 11 features for server-side programming. Server-side programming enables strong data encapsulation and coherence.The book begins with the importance of server-side programming and explains the risks of leaving all the checks outside the database. To build your capabilities further, you will learn how to write stored procedures, both functions and the new PostgreSQL 11 procedures, and create triggers to perform encapsulation and maintain data consistency.You will also learn how to produce extensions, the easiest way to package your programs for easy and solid deployment on different PostgreSQL installations.
Shaun Thomas
Databases are nothing without the data they store. In the event of an outage or technical catastrophe, immediate recovery is essential. This updated edition ensures that you will learn the important concepts related to node architecture design, as well as techniques such as using repmgr for failover automation. From cluster layout and hardware selection to software stacks and horizontal scalability, this PostgreSQL cookbook will help you build a PostgreSQL cluster that will survive crashes, resist data corruption, and grow smoothly with customer demand.You’ll start by understanding how to plan a PostgreSQL database architecture that is resistant to outages and scalable, as it is the scaffolding on which everything rests. With the bedrock established, you'll cover the topics that PostgreSQL database administrators need to know to manage a highly available cluster. This includes configuration, troubleshooting, monitoring and alerting, backups through proxies, failover automation, and other considerations that are essential for a healthy PostgreSQL cluster. Later, you’ll learn to use multi-master replication to maximize server availability. Later chapters will guide you through managing major version upgrades without downtime.By the end of this book, you’ll have learned how to build an efficient and adaptive PostgreSQL 12 database cluster.
Vallarapu Naga Avinash Kumar
PostgreSQL has become the most advanced open source database on the market. This book follows a step-by-step approach, guiding you effectively in deploying PostgreSQL in production environments.The book starts with an introduction to PostgreSQL and its architecture. You’ll cover common and not-so-common challenges faced while designing and managing the database. Next, the book focuses on backup and recovery strategies to ensure your database is steady and achieves optimal performance. Throughout the book, you’ll address key challenges such as maintaining reliability, data integrity, a fault-tolerant environment, a robust feature set, extensibility, consistency, and authentication. Moving ahead, you’ll learn how to manage a PostgreSQL cluster and explore replication features for high availability. Later chapters will assist you in building a secure PostgreSQL server, along with covering recipes for encrypting data in motion and data at rest. Finally, you’ll not only discover how to tune your database for optimal performance but also understand ways to monitor and manage maintenance activities, before learning how to perform PostgreSQL upgrades during downtime.By the end of this book, you’ll be well-versed with the essential PostgreSQL 13 features to build enterprise relational databases.
Gianni Ciolli, Boriss Mejías, Jimmy Angelakos, Vibhor...
PostgreSQL has seen a huge increase in its customer base in the past few years and is becoming one of the go-to solutions for anyone who has a database-specific challenge. This PostgreSQL book touches on all the fundamentals of Database Administration in a problem-solution format. It is intended to be the perfect desk reference guide.This new edition focuses on recipes based on the new PostgreSQL 16 release. The additions include handling complex batch loading scenarios with the SQL MERGE statement, security improvements, running Postgres on Kubernetes or with TPA and Ansible, and more. This edition also focuses on certain performance gains, such as query optimization, and the acceleration of specific operations, such as sort. It will help you understand roles, ensuring high availability, concurrency, and replication. It also draws your attention to aspects like validating backups, recovery, monitoring, and scaling aspects. This book will act as a one-stop solution to all your real-world database administration challenges.By the end of this book, you will be able to manage, monitor, and replicate your PostgreSQL 16 database for efficient administration and maintenance with the best practices from experts.
Simon Riggs, GIANNI CIOLLI, Hannu Krosing, Gabriele...
Through example-driven recipes, with plenty of code, focused on the most vital features of the latest PostgreSQL version (9.4), both administrators and developers will follow short, specific guides to understand and leverage useful Postgre functionalities to create better and more efficient databases.
PostgreSQL 9 Administration Cookbook LITE: Configuration, Monitoring and Maintenance
Simon Riggs, Hannu Krosing
Written in the cookbook style, this book offers learning and techniques through recipes. It contains step-by-step instructions for administrators and developers to manage databases in PostgreSQL. The book is designed in such a way that you can read it chapter by chapter or refer to recipes in no particular order. This book is for Sysadmins, Database Administrators, Architects, Developers, and anyone with an interest in planning for or running live production databases. The book assumes that you are familiar with the basic operation of PostgreSQL.
Shaun Thomas
A comprehensive series of dependable recipes to design, build, and implement a PostgreSQL server architecture free of common pitfalls that can operate for years to come. Each chapter is packed with instructions and examples to simplify even highly complex database operations. If you are a PostgreSQL DBA working on Linux systems who want a database that never gives up, this book is for you. If you've ever experienced a database outage, restored from a backup, spent hours trying to repair a malfunctioning cluster, or simply want to guarantee system stability, this book is definitely for you.
Gregory Smith
PostgreSQL database servers have a common set of problems they encounter as their usage gets heavier and requirements more demanding. You could spend years discovering solutions to them all, step by step as you encounter them. Or you can just look in here.All successful database applications are destined to eventually run into issues scaling up their performance. Peek into the future of your PostgreSQL database's problems today. Know the warning signs to look for, and how to avoid the most common issues before they even happen.Surprisingly, most PostgreSQL database applications evolve in the same way: Choose the right hardware. Tune the operating system and server memory use. Optimize queries against the database, with the right indexes. Monitor every layer, from hardware to queries, using some tools that are inside PostgreSQL and others that are external.Using monitoring insight, continuously rework the design and configuration. On reaching the limits of a single server, break things up; connection pooling, caching, partitioning, and replication can all help handle increasing database workloads.The path to a high performance database system isn't always easy. But it doesn't have to be mysterious with the right guide.
Hans-Jürgen Schönig
If you are a database administrator who needs to get to grips with PostgreSQL quickly and efficiently, then this book is for you. This book will also be highly beneficial if you are a project leader or a developer who is interested in knowing more about database systems or bottleneck detection, as it will enable you to work more closely and cooperatively with your administrators.
PostgreSQL Development Essentials. Advanced querying, data modeling and performance tuning
Manpreet Kaur, Baji Shaik
PostgreSQL is the most advanced open source database in the world. It is easy to install, configure, and maintain by following the documentation; however, it’s difficult to develop applications using programming languages and design databases accordingly. This book is what you need to get the most out of PostgreSQLYou will begin with advanced SQL topics such as views, materialized views, and cursors, and learn about performing data type conversions. You will then perform trigger operations and use trigger functions in PostgreSQL. Next we walk through data modeling, normalization concepts, and the effect of transactions and locking on the database. The next half of the book covers the types of indexes, constrains, and the concepts of table partitioning, as well as the different mechanisms and approaches available to write efficient queries or code. Later, we explore PostgreSQL Extensions and Large Object Support in PostgreSQL. Finally, you will perform database operations in PostgreSQL using PHP and Java. By the end of this book, you will have mastered all the aspects of PostgreSQL development. You will be able to build efficient enterprise-grade applications with PostgreSQL by making use of these concepts
Jayadevan M
This book is for developers and data architects who have some exposure to databases. It is assumed that you understand the basic concepts of tables and common database objects, including privileges and security.
PostgreSQL High Availability Cookbook. Managing a reliable PostgreSQL database - Second Edition
Shaun Thomas
Databases are nothing without the data they store. In the event of a failure - catastrophic or otherwise - immediate recovery is essential. By carefully combining multiple servers, it’s even possible to hide the fact a failure occurred at all.From hardware selection to software stacks and horizontal scalability, this book will help you build a versatile PostgreSQL cluster that will survive crashes, resist data corruption, and grow smoothly with customer demand. It all begins with hardware selection for the skeleton of an efficient PostgreSQL database cluster. Then it’s on to preventing downtime as well as troubleshooting some real life problems that administrators commonly face. Next, we add database monitoring to the stack, using collectd, Nagios, and Graphite. And no stack is complete without replication using multiple internal and external tools, including the newly released pglogical extension. Pacemaker or Raft consensus tools are the final piece to grant the cluster the ability to heal itself. We even round off by tackling the complex problem of data scalability.This book exploits many new features introduced in PostgreSQL 9.6 to make the database more efficient and adaptive, and most importantly, keep it running.
Dinesh Kumar, Chitij Chauhan
PostgreSQL is one of the most powerful and easy to use database management systems. It has strong support from the community and is being actively developed with a new release every year. PostgreSQL supports the most advanced features included in SQL standards. It also provides NoSQL capabilities and very rich data types and extensions. All of this makes PostgreSQL a very attractive solution in software systems.If you run a database, you want it to perform well and you want to be able to secure it. As the world’s most advanced open source database, PostgreSQL has unique built-in ways to achieve these goals. This book will show you a multitude of ways to enhance your database’s performance and give you insights into measuring and optimizing a PostgreSQL database to achieve better performance. This book is your one-stop guide to elevate your PostgreSQL knowledge to the next level. First, you’ll get familiarized with essential developer/administrator concepts such as load balancing, connection pooling, and distributing connections to multiple nodes. Next, you will explore memory optimization techniques before exploring the security controls offered by PostgreSQL. Then, you will move on to the essential database/server monitoring and replication strategies with PostgreSQL. Finally, you will learn about query processing algorithms.