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brupnick
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CBT for VM in Multiple Jobs

Post by brupnick » Dec 07, 2012 4:09 pm

Good morning-

I have a VM that is backed up by two separate jobs (different targets, different retention periods, etc). Job A runs a full on the first Friday of the month and traditional incrementals each weekday thereafter. Job B is only run on the first Sunday of the month and does a full every time. I'd really like to change Job B to something different, either reversed incrementals or synthetic fulls (input on this would also be welcomed). If I have the same VM in both jobs, how, if at all, will that affect CBT for the VM?

Thank you!
Brian

andersonts
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Re: CBT for VM in Multiple Jobs

Post by andersonts » Dec 07, 2012 4:29 pm

The CBT file is not modified by Veeam so each job can use it to capture only the changes without impacting the other job.

brupnick
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Re: CBT for VM in Multiple Jobs

Post by brupnick » Dec 07, 2012 4:33 pm

Thanks Tim. Is VBR able to differentiate the changes between jobs? That is, Job A runs nightly and Job B runs monthly. Is Job B able to know that it should back up a month's worth of changes while Job A only a day's?

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Re: CBT for VM in Multiple Jobs

Post by andersonts » Dec 07, 2012 4:54 pm

Yep as long as nothing has happened to reset CBT in the month between backups.

brupnick
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Re: CBT for VM in Multiple Jobs

Post by brupnick » Dec 07, 2012 4:58 pm

Awesome. Thanks Tim!

Do you have any recommendations on reversed incrementals vs. synthetic fulls? These are strictly disk-based backups with no requirement to go to tape. The only reason that I don't run traditional incrementals is because I need to be able to delete the oldest points in order to make room if/when necessary.

Vitaliy S.
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Re: CBT for VM in Multiple Jobs

Post by Vitaliy S. » Dec 07, 2012 8:05 pm

brupnick wrote:The only reason that I don't run traditional incrementals is because I need to be able to delete the oldest points in order to make room if/when necessary...

...I need to be able to delete the oldest points in order to make room if/when necessary.
Given all these requirements, I would suggest using reversed incremental backup mode, as it will give you these benefits:

a. ability to delete the oldest restore points manually
b. latest VBK file will always contain the most recent image of your backed up VMs
c. only one full backup (VBK file) will be stored on the target storage at a time

brupnick
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Re: CBT for VM in Multiple Jobs

Post by brupnick » Dec 07, 2012 8:39 pm

Thanks Vitaliy; this does seem to address all of my requirements. Are there any issues if I switch my job that is currently running fulls every run to reversed incrementals?

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Re: CBT for VM in Multiple Jobs

Post by Vitaliy S. » Dec 07, 2012 8:45 pm

No issues at all, the subsequent backup job run will be will be incremental, so feel free to proceed with this option.

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