ONTAP Discussions

SnapMirror Query

shashidhargc
4,101 Views

Hi,

We are planing hourly snapmirror update from source filer FAS2040 (DC) to destination filer FAS2040 (DR) for a volume.

Our query is below.

Suppose at 11.45 AM , we come to know that there was file corruption at source (DC) and it happened at 10.30 am .
Can we revert backup to status at 10.00 am by using reverse snapmirror resyncs from DR  to DC ?

If yes, What is the procedure ?

Can we achive this by deleting snapmirror snapshot of 11.00 am from both DC and DR?

Pls guide.

Thanks,

Shashi

5 REPLIES 5

aborzenkov
4,101 Views

Is it VSM or QSM?

shashidhargc
4,101 Views

it is VSM

aborzenkov
4,101 Views

VSM is exact mirror of source anyway. So if you update every hour, at 11:00 you will have the same corruption dated 10:30 on destination too. You can simply revert to snapshot earlier than 10:30 on source as long as you still have it.

VSM is not really intended for such sort of things. To protect against logical corruption local snapshots are just fine.

shashidhargc
4,101 Views

thank you for clarifying.

can you please tell me what would happen in case of QSM.

aborzenkov
4,101 Views

The main difference is that you can keep more snapshots on destination. But usually snapmirror is for disaster recovery (to ensure data replication); for backup snapvault is more appropriate.

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