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Do I need to also replicate snapinfo volume?

My customer has a primary and secondary datacenter. We've configured snapmanager for Exchange in the primary and all is working great. They'd now like to use snapmirror to replicate the backups to the secondary site.

This has also been setup just fine. As it stands right now we're replicating the snapmanager backups and using rolling snapshots to replicate the transaction logs. In case of disaster break the mirror and mount the replicated volumes.

They'd also like to be running snapmanager for exchange at the destination datacenter. The plan is if a disaster strikes and they need to be running exchange over at the DR site, they'd like to be protecting the Exchange data with snapmanager - just like the primary site.

Would I need to be replicating the snapinfo volume from the primary in order to have that backup data metadata over at the DR site? Basically, they'd like to be in a position at the DR site that after a disaster strikes and they're now running snapmanager for exchange there, they have access to all of the backups that took place over at the primary site. I know that the snapinfo directory stores the backup set info - so i'd assume that it would need to be replicated as well.

Could someone let me know?

Re: Do I need to also replicate snapinfo volume?

YES

Can on remember the link to the SME guide but yes

Brendon

Re: Do I need to also replicate snapinfo volume?

Thanks. There's nothing specific in the SME guide that addreses replicating the snapinfo volume over.

Cheers

Re: Do I need to also replicate snapinfo volume?

How do you go about archiving your SnapManager backups? NDMP, Snapvault, mounting the snapshot and backing up with backup app, backup agent on host? Just wondering what's the easiest method.

Re: Do I need to also replicate snapinfo volume?

Looking at your options here, SnapVault is obviously the easiest as you all NetApp to send the delta's off site to another NetApp site. You can then use SMBR to recover individual mail messages and/or use FlexClone to bring up a DR "copy" of the database. You can then spin it off to tape off site via NDMP or the mounting method you described.

Looking at the live controller, you can do NDMP and it has its advantages as well; as you can go straight from the controller to a tape library via a fiber connection to your SAN. However you are grabbing the full LUN at that point and a restore is the full LUN (depends on how you layout your Information Stores). If this is Exchange 2007, then one data store per LUN is best practice and you should be fine.

Mounting the LUN to a media server and backing up the individual files is also a method that works, but usually requires scripting of some sort to have this happen manually.

Hope this helps.

Ray LaMarca

Technical Partner Manager

 

Raymond.Lamarca@netapp.com

http://www.netapp.com

W: 847-430-6547

C:847-529-8931

 

Got questions? Get answers in the Partner Network.

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Re: Do I need to also replicate snapinfo volume?

Hi Raymond. Thanks for the response. I've narrowed the archive options down to either a backup application agent installed on Exchange and a copy/diff backup being done, or a flexclone operation. If I'm doing a snapmirror operation to a DR site would you recommend a flexclone be performed on the DR volumes and then have the backup application mount the flex clone database and perform the backup? Just wondering how to go about using flexclone to perform the archive backup.

Cheers

Re: Do I need to also replicate snapinfo volume?

No problem Ian,

There really is no need to do the FlexClone on the DR side. You can mount the SnapMirror destination "copy" of the LUN and backup that to tape. The only reason for a FlexClone would be if you needed to re-mount the Information Stores, thus needing them in a writable version instead of Read/Only (which is what the Snap Mirror destination is).

Hope this helps.

Ray LaMarca

Technical Partner Manager

 

Raymond.Lamarca@netapp.com

http://www.netapp.com

W: 847-430-6547

C:847-529-8931

 

Got questions? Get answers in the Partner Network.

http://communities.netapp.com/community/netapp_partners_network

Re: Do I need to also replicate snapinfo volume?

Hi Raymond. How do I go about copying the destination copy, since it's in read-only mode? Will I be able to connect to the read only lun and back it up?

Re: Do I need to also replicate snapinfo volume?

Yes, you can always mount a Snapshot (Read Only) of a LUN to another server. You can do this with Snap Drive using the Connect feature (this can be scripted).

Ray LaMarca

Technical Partner Manager

 

Raymond.Lamarca@netapp.com

http://www.netapp.com

W: 847-430-6547

C:847-529-8931

 

Got questions? Get answers in the Partner Network.

http://communities.netapp.com/community/netapp_partners_network

Re: Do I need to also replicate snapinfo volume?

Technically using the "connect" feature in SnapDrive will always clone the SnapMirror destination and as such make it writable.

If you want to take this to tape, can you not just use NDMP and pull the snapshot directly from the filer? This would certainly be the easiest way of doing it.