Fast-Start Failover May Fail if Primary Nodes Crash One After Another
Last updated on APRIL 29, 2015
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 to 126.96.36.199 [Release 11.2]
Information in this document applies to any platform.
If all instances of a primary crash and there is any delay in when each instance goes down with respect to the other instances, a Data Guard environment configured for MAXIMUM AVAILABLITY mode can become UNSYNCHRONIZED.
For example, let's say with a 2-node RAC primary, instance BOSTON1 goes down at 11:23:48. Then at 11:24:20, instance BOSTON2 crashes. This would result in standby becoming unsynchronized.
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