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PostgreSQL High Availability Cookbook - Second Edition

You're reading from PostgreSQL High Availability Cookbook - Second Edition

Product type Book

Published in Feb 2017

Publisher Packt

ISBN-13 9781787125537

Pages 536 pages

Edition 2nd Edition

Languages

Concepts

High Performance Programming

Author (1):

Shaun Thomas

Table of Contents (18) Chapters

Title Page

Credits

About the Author

About the Reviewer

www.Packtpub.com

Customer Feedback

Preface

1. Hardware Planning

2. Handling and Avoiding Downtime

3. Pooling Resources

4. Troubleshooting

5. Monitoring

6. Replication

7. Replication Management Tools

8. Simple Stack

9. Advanced Stack

10. Cluster Control

11. Data Distribution

Examining /proc/net/bonding/bond0

Highly-available databases often come in pairs for redundancy purposes. These servers can have any number of procedures to keep the data synchronized, and this book suggests direct connections when possible. Direct connections between servers ensure fast communication between redundant servers, and it resembles the following network design:

In some cases, it can be advantageous to connect the database servers to a general network fabric. Depending on the interaction of the upstream network devices, this can significantly increase the network packet's round-trip-time (RTT). This is usually fine for PostgreSQL replication, but OLTP systems may be more sensitive. Block-level replication systems, such as DRBD, which operate beneath the filesystem, fare even worse.

Each of our database servers should be equipped with at least two independent network interfaces. In order to prevent downtime, these interfaces must be linked with a bond. Network bonds act as an abstraction...

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Authors (1)

Shaun Thomas

Shaun M. Thomas has been working with PostgreSQL since late 2000. He is a frequent contributor to the PostgreSQL Performance and General mailing lists, assisting other DBAs with the knowledge he's gained over the years. In 2011 and 2012, he gave presentations at the Postgres Open conference on topics such as handling extreme throughput, high availability, server redundancy, and failover techniques. Most recently, he has contributed the Shard Manager extension and the walctl WAL management suite. Currently, he serves as the database architect at PEAK6 Investments, where he develops standard operating procedure (SOP) guidelines to facilitate reliable server architecture among many other tasks. Many of the techniques used in this book were developed specifically for this extreme environment. He believes that PostgreSQL has a stupendous future ahead, and he can't wait to see the advancements subsequent versions will bring. https://www.linkedin.com/in/bonesmoses

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