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PostgreSQL 10 Administration Cookbook - Fourth Edition
book

PostgreSQL 10 Administration Cookbook - Fourth Edition

by Simon Riggs, Gianni Ciolli
May 2018
Intermediate to advanced content levelIntermediate to advanced
576 pages
30h 25m
English
Packt Publishing
Content preview from PostgreSQL 10 Administration Cookbook - Fourth Edition

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 specified a trigger_file parameter ...
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Publisher Resources

ISBN: 9781788474924Supplemental Content