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PostgreSQL 9 Administration Cookbook - Second Edition

You're reading from  PostgreSQL 9 Administration Cookbook - Second Edition

Product type Book
Published in Apr 2015
Publisher Packt
ISBN-13 9781849519069
Pages 504 pages
Edition 1st Edition
Languages
Toc

Table of Contents (19) Chapters close

PostgreSQL 9 Administration Cookbook Second Edition
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. First Steps 2. Exploring the Database 3. Configuration 4. Server Control 5. Tables and Data 6. Security 7. Database Administration 8. Monitoring and Diagnosis 9. Regular Maintenance 10. Performance and Concurrency 11. Backup and Recovery 12. Replication and Upgrades Index

Managing streaming replication


Replication is great provided it works. Replication works well if it's understood and works even better if it's tested.

Getting ready

You need to have a plan for the objectives for each individual server in the cluster. Which standby server will be the failover target?

How to do it…

Switchover is a controlled switch from the master to the standby. If performed correctly, there will be no data loss. To be safe, simply shut down the master node cleanly, using either the smart or fast shutdown modes. Do not use the immediate mode shutdown because you will almost certainly lose data that way.

Failover is a forced switch from the master node to a standby because of the loss of the master. So, in that case, there is no action to perform on the master; we presume it is not there anymore.

Next, we need to promote one of the standby nodes to be the new master. A standby node can be triggered into becoming a master node in one of two ways:

  • pg_ctl promote

  • Suppose you originally...

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