Wednesday, April 2, 2014

Semi-Synchronous Replication at Facebook

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After intensive testing and hack, we started using Semi-Synchronous MySQL Replication at Facebook production environments. Semi-Synchronous Replication itself was ready since MySQL 5.5 (GA was released 3.5 years ago!), but I'm pretty sure not many people have used in production so far. Here are summary of our objective, enhancements and usage patterns. If you want to hear more in depth, please feel free to ask me at Percona Live this week.

Objective / Why Semisync?
The objective of the Semi-Synchronous Replication is simple -- Master Failover without data loss, without full durability.

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