SyncIQ and SmartQuotas

Question

How exactly should SmartQuotas be treated in SyncIQ enabled Cluster pairs?

From what I read, one should only have SmartQuotas enabled on the SyncIQ source cluster, right? It is strongly recommended to not have any SmartQuotas enabled on the target cluster that point to SyncIQ target directories.

Does this imply that during/after SyncIQ failover, one must delete the SmartQuotas on the source cluster? Because, during the time that the SyncIQ target cluster is used as production cluster, the original source cluster becomes the temporary target cluster...

Real world procedure would be:

1. Initiate SyncIQ failover tasks

2. Delete SmartQuotas on source cluster

3. Configure SmartQuotas on target cluster (if desired)

4. Run production on target cluster until ready for failback

5. Initiate SyncIQ failback tasks

6. Delete SmartQuotas on target cluster (if configured in 3.)

7. Configure SmartQuotas on source cluster

8. Run production on source cluster

Peter_Sero · Accepted Answer

I think you have covered the essence of the KB article.

If in doubt, the "Workaround" section of the KB also expresses it in a brief and consise way:

"To avoid the problem, modify SmartQuotas quota domains as follows:

Remove all target-side quotas below the target's SyncIQ root path.
Ensure multiple quota domains do not span SyncIQ target subtrees.
If failback to a source cluster is desired, make sure that multiple quota domains do not span SyncIQ source subtrees.
The quota domain must exist on the root path only (top-level directory) of either the source or the target."

Cheers

-- Peter

Peter_Sero · Answer

Which document says so? There are only a few tricky corners, a consise and recent document is this KB article, updated last November:  https://www.dell.com/support/kbdoc/en-us/000035105/  hth -- Peter

CendresMetaux · Answer

so, after re-reading your link several times (thats quite a heavy read), is the following statement correct:

If SyncIQ policies and SmartQuota policies are always created on the same directory level on the source cluster, all should be fine during normal operation, during SyncIQ failover and also for failback. No SmartQuotas would have to be removed at any time to assure error free SyncIQ functionality. One just has to keep an eye on the SmartQuota policies during failover time to make sure that the quotas would not be exceeded when failing back.

Thanks a lot for your help!

CendresMetaux · Answer

great, thanks for the clarification!

Isilon

SyncIQ and SmartQuotas

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