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3 Using Dell PS Series Asynchronous Replication | TR1052
Table of contents
Revisions ............................................................................................................................................................................................. 2
Acknowledgements .......................................................................................................................................................................... 2
Introduction ....................................................................................................................................................................................... 5
Audience ............................................................................................................................................................................................. 5
Objective ............................................................................................................................................................................................ 5
1 About Asynchronous Replication ........................................................................................................................................... 6
2 Replication planning .................................................................................................................................................................. 7
2.1 Primary and secondary group administration ........................................................................................................... 8
2.2 Space requirements ........................................................................................................................................................ 8
2.3 Volumes .......................................................................................................................................................................... 10
2.4 Volume collections ....................................................................................................................................................... 10
2.5 Replica frequency and keep count ............................................................................................................................ 10
2.6 Schedules ........................................................................................................................................................................ 11
2.7 Failover and failback considerations........................................................................................................................... 11
3 Configuring group replication ............................................................................................................................................... 13
3.1 Configuring volume replication ................................................................................................................................. 19
3.1.1 Configuring volume replication schedules .............................................................................................................. 22
4 Replicating a volume ............................................................................................................................................................... 24
5 Managing replication............................................................................................................................................................... 25
5.1.1 Monitoring replication .................................................................................................................................................. 25
5.1.2 Monitoring replication space ...................................................................................................................................... 27
5.1.3 Managing delegated space ......................................................................................................................................... 28
5.1.4 Promoting a replica to a recovery volume ............................................................................................................... 31
5.1.5 Connecting to a recovery volume ............................................................................................................................. 36
5.1.6 Replicating a recovery volume ................................................................................................................................... 39
5.1.7 Failback a recovery volume to primary ..................................................................................................................... 42
6 Troubleshooting....................................................................................................................................................................... 45
6.1.1 Replication fails due to lack of local replication reserve........................................................................................ 45
6.1.2 Replication times out or cannot complete before the next scheduled replication.......................................... 45
6.1.3 Not enough replicas are being kept .......................................................................................................................... 45