creategroupsv versus createsv

[evan631]

We have started using snapshots on our F400. I am a bit confused regarding the command creategroupsv and createsv.

What are the major differences.

I have many volumes for my email system that i would like to get snapshots of. Creating a scheduled task will not allow me to use the creategroupsv command with a VV set. The task failed. Is there something wrong with my command?

creategroupsv -ro -exp 72h set:nyrfcmb01_set

I can only assume you cannot use vv sets with the creategroupsv command.

I could use the createsv command on the VV set, I'm just not sure what the difference is.

I do want to run it against a VV set because we periodically add volumes to this system, and as long as we update the vv set, we would not have to change any scripts or schedules.

Thanks for the help.

-Evan

[Christian]

You cant use creategroupsv combined with a volume set.

The creategroupsv command creates consistent group snapshots of a list of
virtual volumes. Consistent group snapshots are all created at the same
point in time so that related structures on different volumes in the group
remain consistent.

So you have to use the createsv command instead if your using volume set.

Only reason to use the creategroupsv command might be in cases where you have exported 2x Volumes to the same host and put them together as one disk inside the OS. Or when you depend on the disk to have a snapshot taken on the same time.

I use the createsv with a volume set to run hourly snaps of file clusters / VMware and it works great.

[evan631]

Only reason to use the creategroupsv command might be in cases where you have exported 2x Volumes to the same host and put them together as one disk inside the OS. Or when you depend on the disk to have a snapshot taken on the same time.

I use the createsv with a volume set to run hourly snaps of file clusters / VMware and it works great.

Thanks for the reply. I am glad you mentioned this. Our main application has two volumes exports and spanned as one. I have already created the snapshots for this using creategroupsv as there are only two volumes.

The other system i need to snap is my mailbox servers. Each have about 10 volumes right now, but are not spanned. So the createsv will work just fine.

Thanks again.
-Evan