compellent replay manager snapshots

[dirkdigs]

i have veeam v8 configured with 2 node hyper v cluster and dell compellent storage.

replay manager software is installed on the off host backup proxy and both HV nodes

veeam backups are leveraging the compellent replay manager vss provider.

I have a 6 TB CSV volume. When i do a backup does the comepellent snapshot to whole 6 TB volume? How does this work?

If i am only backing up 1 server in this CSV does it still snapshot he whole 6 TB ? Im trying to figure out how much free space i need for SAN snapshots now.

thanks,

[Vitaliy S.]

Hi Jason,

Yes, the entire volume will be snapshotted via the configured VSS provider. Do you want to determine how much space is required on ht off-host backup proxy?

Please take a look at our online documentation for additional details > http://helpcenter.veeam.com/backup/80/h ... proxy.html

Thanks!

[dirkdigs]

so if i run a backup job that backups up a file server VM (say 1 TB) and the LUN that contains this file server is 6 TB. The Veeam software will take a 6 TB snapshot or is it smart enough to see this server total size and will only snapshot that portion of the LUN where the VM resides?

So in this case do i need to always have minimum 6TB of free space for the snapshot?

[Vitaliy S.]

No, VSS snapshots do not consume the same space as you've allocated to the volumes. You can check that by manually triggering a shadow copy snapshot on the volume of your Windows Server.

[dirkdigs]

OK the snaphost was approx 400 GB ,I also noticed it marks the replay as "never expires" however it did delete it after the job finished. interesting.

[Vitaliy S.]

Yes, that's expected, cause after your backup job finishes VSS snapshot is removed from the volume it was taken from.