Yan Xu created COTTON-5:
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             Summary: Leverage GTID to properly failover MySQL master instances.
                 Key: COTTON-5
                 URL: https://issues.apache.org/jira/browse/COTTON-5
             Project: COTTON
          Issue Type: Task
            Reporter: Yan Xu


The current Cotton master failover code is capable of reliably detecting the 
dead instance, sending queries to find the "most current" slave and sending the 
commands to promote the new master and reparent the slaves. However without 
GTID our current scripts that Cotton invokes to do these things aren't 
sufficient because some files need to be copied out of band by tools such as 
[MHA|https://code.google.com/p/mysql-master-ha/].

If we leverage GTID in MySQL 5.6 we can make failover really work without 
relying on external tools.



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