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7 Posts
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1982
February 22nd, 2011 07:00
Checkpoint/Snapshots in a different Storage Pool
Do checkpoints have to be in the same storage pool as the source file system? Or can I have the checkpoints saved to a different storage pool? If so how is this setup? I don't see anything in the checkpoint scheduler about choosing a different storage pool...
Thanks!
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DanJost
190 Posts
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February 22nd, 2011 08:00
Create a regular (non-sheduled) checkpoint on the pool that you want and then set up your schedule. Once your schedule kicks in, the new checkpoints from the scheduler will go to that pool until you delete all checkpoints. After the schedule starts and you get "new" checkpoints, delete the original one. You get the same issue when creating replicas as it'll default to the storage pool of the source file system. If you want to change it later I think you have to delete all of your checkpoints (i.e. you can't move it).
Dan
gbarretoxx1
366 Posts
0
February 22nd, 2011 08:00
Hi,
Yes, it's possible, but we don't recommend you to use a lower speed drive to put the SavVol on performance sensitive file systems. It might slow down the production file system.
This is from "Using SnapSure on Celerra" available on powerlink :
Note: By default, EMC Automatic Volume Management (AVM) algorithms determine the selection
of disks used for a SavVol. AVM tries to match the storage pool for the SavVol with that of the
PFS whenever possible. However, if you do not want to use the AVM selection method, SnapSure
provides the option of specifying any available pool for the SavVol when you create the first PFS
checkpoint. The SavVol can be autoextended as long as space is available on the same disk type.
For example, if the SavVol is built on an EMC CLARiiON® standard (CLSTD) disk, then autoextend
can occur only if space is available on another CLSTD disk. The autoextend feature cannot use a
CLARiiON ATA (CLATA) disk for the autoextend. Use the nas_disk -list command to display the
disk types.
Gustavo Barreto.
Rainer_EMC
4 Operator
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8.6K Posts
1
February 22nd, 2011 09:00
You could store checkpoints in a different pool than the primary file system by creating the savvol in a different pool
You cant set that in the scheduler – you have to manually create the first checkpoint and select the pool there – the others will follow and use the same savvol
Once the schedule is run once and there are more than one checkpoint for that fs you can delete the manual checkpoint
Of course this can have a performance impact
Rainer
JohnnyUtahNmbr9
7 Posts
0
February 22nd, 2011 12:00
This is how I setup it up and chose a different storage pool, I just wanted someone to confirm my logic. Thanks for your help!