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08-30-2018 02:47 AM
08-30-2018 02:47 AM
Hi,
I have a question about 3par remote coyp failover procedure... Assume that an synchronous rcopygroup is replicated from 3parA to 3parB.
After a failover, B becomes to primary-rev. then the recover makes A become to secondary-rev, and the rcopy status will be synced.
I believe there are two ways to resume original rcopy direction.
a) setrcopygroup restore, A will resume to be primary, and B is seconday.
b) setrcopygroup reverse -natrual <group_name> # B transfer from primary-rev to primary. A transfer from secondary-rev to secondary.
setrcipygroup switchover <group_name> #switchover the direction, A is primary, B is secondary.
So, normally which is better? and what is the difference of the two ways.. Thanks in advance!
Solved! Go to Solution.
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09-05-2018 04:41 AM
09-05-2018 04:41 AM
SolutionHi Dennishen,
In case of Synchronous Replication group (Not part of Peer persistence), the preferred method is "setrcopygroup restore".
This is because there is no path_management option used in the Remote copy group, and the secondary side volumes are not exported to the host, and the failover / failback is done manually.
And in case of Peer persistence setup, the preferred method is to use "setrcopygroup reverse -natural" and then use the "setrcopygroup switchover",
This is because the Peer persistence groups uses Path_management option, and hence exported from both primary and secondary sides.
Hence the host transparent switchover can be done on the peer persistence group.