Host-based backup of VMware vSphere VMs.
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StanoSedliak
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1 VM in 2 backup jobs, CBT

Post by StanoSedliak »

Hi,

Im wondering if a I have one VM in 2 backup jobs if an active full can reset the CBT also for the second backup job.

I have 1x VM in 2 different backup jobs.
JobA - full was done on Monday rest of the week is incr. and again on monday an active full run - here I have a message Resetting CBT per job settings for active fulls

JobB - full was done on Tuesday with no schedule, one week there was no job running, again after one week (after JobA active full=resetting CBT for the VM) I started manually a incr. job but my incr. needs to read again the whole Hard Disk for changes as CBT was reseted via JobA.

I understand it correctly that if an active full in JobA will reset CBT it will affect also my second job JobB and this job will scan the whole hard disk?

Thank you!
Gostev
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Re: 1 VM in 2 backup jobs, CBT

Post by Gostev » 1 person likes this post

Hi, the CBT reset functionality resets the CBT database on the vSphere VM itself, so consequently each and every job will be affected similarly. Thanks
Andreas Neufert
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Re: 1 VM in 2 backup jobs, CBT

Post by Andreas Neufert » 1 person likes this post

To add, if an incremental run was scheduled and CBT reset happened, then the job run will do an incremental backup by reading 100% of the data but storing only the changes. It takes a bit longer to read all the data, but the result on disk is the same as a normal incremental run.
StanoSedliak
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Re: 1 VM in 2 backup jobs, CBT

Post by StanoSedliak » 1 person likes this post

thank you for the confirmation, I have a second job where instead of 30min. it takes now 8 hours because the first job with active full reseted CBT but as Andreas mentioned it stores only the incr. amount of data so only the time is the problem, but I will be now prepared for the next runs.
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