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Comparing MySQL and Postgres 9.0 Replication

Nov 18, 2010, 23:34 (0 Talkback[s])
(Other stories by Robin Schumacher, Gary Carter)

"Replication is one of the most popular features used in RDBMS's today. Replication is used for disaster recovery purposes (i.e. backup or warm stand-by servers), reporting systems where query activity is offloaded onto another machine to conserve resources on the transactional server, and scale-out architectures that use sharding or other methods to increase overall query performance and data throughput.

"Replication is not restricted to only the major proprietary databases; open source databases such as MySQL and PostgreSQL also offer replication as a feature. While MySQL has offered built-in replication for a number of years, PostgreSQL replication used to be accomplished via community software that was an add-on to the core Postgres Server. That all changed with the release of version 9.0 of PostgreSQL, which now offers built-in streaming replication that is based on its proven write ahead log technology.

"With the two most popular open source databases now providing built-in replication, questions are being asked about how they differ in their replication technologies. What follows is a brief overview of both MySQL and PostgreSQL replication, with a brief compare and contrast of the implementations being performed immediately afterwards."

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