Robustness to interruptions during backup

Backup agent for Microsoft Windows servers and workstations (formerly Veeam Endpoint Backup FREE)

Robustness to interruptions during backup

Veeam Logoby bobsca » Sat Jul 09, 2016 11:54 pm

I've searched the documentation but can't find any information regarding VEB's robustness to interrupted backup operations, e.g. PC enters standby or shutdown, or has a power-failure, or NAS destination goes offline.

If one of these situations occurs during a full or incremental backup, what is the expected behavior?

Will the a full backup fail and be discarded or will the backup automatically continue when power is restored?

Will a partially-written (and possibly damaged) most-recent increment file be automatically discarded during the next incremental backup?

What happens if the interruption occurs during the merging of an expired increment file? Can the entire chain become unusable? If so, is the user alerted?
bobsca
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Re: Robustness to interruptions during backup

Veeam Logoby Vitaliy S. » Sun Jul 10, 2016 7:30 pm

Hi Bob,

If either of the backups fail (full or incremental), there is no resume functionality, but the subsequent job pass will re-use this data and will create a new restore point. This logic applies to all cases mentioned above.

Thanks!
Vitaliy S.
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Re: Robustness to interruptions during backup

Veeam Logoby bobsca » Sun Jul 10, 2016 8:10 pm

Hi Vitaliy,

Would you please elaborate on the case of an interruption during a merge?
Is it possible that this will corrupt the VBK, leaving the system without a usable backup prior to the next backup job?

Thx,
Bob
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Re: Robustness to interruptions during backup

Veeam Logoby Vitaliy S. » Sun Jul 10, 2016 8:25 pm 1 person likes this post

This will corrupt the latest restore point, however you will be able to select any restore point (previous one) to do the restore.

Here is a bit more information on this (see Gostev's response) > Reverse Incremental - what happens when backup fails? (even though this is for VBR and reversed incremental backup mode, the same logic can also be applied to VEB).
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