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serverbu
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Question regard Backup of VMs with Snapshot

Post by serverbu » Apr 22, 2015 2:56 pm

Making some mind games regarding veeam b&r just now, a question arose.

Say we have a fresh VM without snapshot. We work for 5 days and create a snapshot. We work further 5 days with this VM than we make a backup of it using veeam b&r.
After a few days we crash the VM horribly and need to restore it so we restore the veeam b&r backup.
What happens to the snapshot we created on day 5? Is it still present in vmware and more important if it is still present, is it still usable or would we produce datagarbage when roling back to that snapshot after we had restored with veeam?

fresh VM
|
|-->snapshot1
|
|-->veeam b&r

what exactly is veeam copying to backup storage? just the normal vmdks along with vmx and other definition files (would be state of fresh VM) or the whole VM folder including the snapshots delta file (would be state of snapshot1)?

veremin
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Re: Question regard Backup of VMs with Snapshot

Post by veremin » Apr 22, 2015 4:16 pm

The snapshot tree is not preserved. The restored VM will reflect the VM state at the time when backup has occured.

serverbu
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Re: Question regard Backup of VMs with Snapshot

Post by serverbu » Apr 23, 2015 7:57 am

So is veeam consolidating the snapshot into the VM data on backup?
For this example restored VM would have state of fresh VM consolidated with state of snapshot1?

veremin
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Re: Question regard Backup of VMs with Snapshot

Post by veremin » Apr 23, 2015 10:38 am

VB&R creates helper snapshot to capture VM state at the time of backup.

foggy
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Re: Question regard Backup of VMs with Snapshot

Post by foggy » Apr 23, 2015 11:02 am

Existing source VM snapshots get consolidated into a single flat file (containing actual VM state) that is backed up during backup job.

Alex.Vetrov
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[MERGED] Question about backup proxy "Virtual appliance" mod

Post by Alex.Vetrov » Nov 16, 2015 10:41 am

Hello, all!

For example: we have virtual machine with user-created snapshot(s). Also we have backup proxy, which works in Virtual appliance mode only (without fallback NBD).
What will happen if we start backing up this VM? What data will contain a backup:
1) VM disk before creating first user snapshot?
2) VM disk with user created snapshot(s)?
3) Backup job will fail?

Thanks for answers.

foggy
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Re: Question regard Backup of VMs with Snapshot

Post by foggy » Nov 16, 2015 10:53 am

Alexey, regardless of the transport method, the backup will contain the actual VM state.

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