May 2017
Beginner
416 pages
10h 37m
English
Content preview from Mastering PostgreSQL 9.6
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Using multiple synchronous standby servers
PostgreSQL has been able to perform synchronous replication for quite a while already. In PostgreSQL, it is possible to have more than just one synchronous server from 9.6 onward. Earlier, only one server had to acknowledge a commit. Now it is possible to have an entire group of servers that has to confirm a commit. This is especially important if you want to improve reliability in case of multi-node error.
The syntax to use this new feature is simple:
synchronous_standby_names = '3 (server1, server2, server3, server4)
However, there is more to synchronous replication in PostgreSQL 9.6. Previously, PostgreSQL ensured (synchronous_commit = on) that the transaction log has reached the slave. However, ...
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