April 2018
Intermediate to advanced
508 pages
15h 22m
English
Content preview from PostgreSQL 10 High Performance - Third Edition
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pgpool-II load balancing for replication scaling
Because of its replication and load balancing related features, for some purposes, pgpool-II is the right approach even though it's not necessarily as optimal as just a connection pool. pgpool-II supports what it calls master/slave mode, for situations where you have a master database that handles both reads and writes, as well as a number of replicated slaves that are only available for reading.
The default replication software it assumes you're using, and the only one available in older versions of the software, requires you have a set of databases all kept in sync using the Slony-I replication software. A common setup is to have a pgpool-II proxy in front of all your nodes, to spread the ...
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