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nmdange
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VM Order in Backup Job

Post by nmdange » Aug 01, 2016 1:37 pm

How much of a difference does the order of the VMs in the backup job make? I've noticed a lot of VMs spend a good amount of time in "Resource not ready: snapshot" state. Since only 4 VMs can be backed up per snapshot, this is expected. When watching the backup job run, it looks like Veeam processes them in the order in the job, but will skip over VMs that are waiting for resources. However, it doesn't seem like Veeam is always snapshotting/backing up 4 VMs from the same disk. Would changing the order of the VMs in the job so that VMs on the same disk are together help?

PTide
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Re: VM Order in Backup Job

Post by PTide » Aug 02, 2016 12:05 pm

Hi,
ow much of a difference does the order of the VMs in the backup job make
It makes a very big difference

Thanks

foggy
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Re: VM Order in Backup Job

Post by foggy » Aug 03, 2016 1:53 pm

Veeam B&R uses shared volume snapshots, so VMs order in the job doesn't affect overall job duration. VMs residing on the same volume are backed up according to their order in the list, while what you're seeing is most likely VMs residing on another volume waiting for their corresponding snapshot to be released (if other 4 VMs from this volume are already being backed up).

nmdange
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Re: VM Order in Backup Job

Post by nmdange » Aug 04, 2016 2:01 pm

Yeah that is what I assumed would happen, except I only see 1 or 2 VMs actively being backed up at times, with many VMs in the snapshot not ready state. But that's just what I'm seeing when I have time to watch the backups in the evening. It's hard to discern what happened after the fact since "Resource not ready: snapshot" doesn't appear in the backup job's history after the VM finished.

foggy
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Re: VM Order in Backup Job

Post by foggy » Aug 04, 2016 2:09 pm

You can ask support to take a closer look at your setup and check whether this behavior is expected.

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