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April 23rd, 2009 09:00

Can we split the devices when RDF pair is in consistent state.

We established the rdf pair last week, Now the DBAs wants to validate the data on remote devices. devices are in async mode and consistent state.

No write operations are occuring on the source devices right now. Can I go ahead and split the devices for them to do the validation process?

Please let me know, if the devices needs to be in synchronized state before i split them. Also, i would like to know the difference between synchronized state and consistent state.

When i change the mode to "acp_disk", i see the RDF pair state as synchronized.

please reply soon. Thanks in advance.

1.3K Posts

April 23rd, 2009 11:00

when you almost synced everything then set mode async and then split it.

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April 24th, 2009 01:00

Kushi as Santhosh suggested, put RDF group back in Async mode. When group is Consistent, split R2 devices. Splitting the devices will write-enable R2 devices and give you a consistent image of your R1 devices.

-s-

2.1K Posts

April 30th, 2009 10:00

Hey there Kushi,

As santhosh and Stefano have already stated, the ideal state to be in before splitting is in async mode and consistent.

When you are in acp_disk mode the best you can hope for is a synchronized state. Consistent state in async mode is actually one step better than that... when you are consistent, you can be certain that all the R2 devices in your group are actually synched up to a consistent point in time from the R1s.

So, you had what you needed, it was just an understanding thing. In async mode you will only see devices in a group in synchronized state if one or more devices are still SynchInProg.
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