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Vitaliy S.
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Re: VM Backup Speed Optimization

Post by Vitaliy S. » Aug 20, 2010 8:18 am

Yes, of course! Here is another link for this tool:

http://www.veeam.com/forums/viewtopic.p ... ipt#p15912

slidek9
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Re: VM Backup Speed Optimization

Post by slidek9 » Aug 27, 2010 3:11 pm

How much will defragging a drive upset the CBT? Will it mean that a lot of extra data which the CBT records when defrag hits the disk sectors will be backed up?

Vitaliy S.
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Re: VM Backup Speed Optimization

Post by Vitaliy S. » Aug 27, 2010 3:37 pm

Leon,

You're correct.The first incremental backup after defragmentation will produce huge incremental file because of many blocks changed. You will see the benefits of defragging only on the following job run. In fact, I would recommend to perform full backup immediately after defragmentation.

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Re: VM Backup Speed Optimization

Post by eiskra » Mar 21, 2013 5:03 pm

Although a defrag will cause many blocks to change (move), if you run an SDELETE, shouldn't we expect the incremental change to be very small, because all of the zeroed sectors should be deduplicated or compressed to almost nothing?

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Re: VM Backup Speed Optimization

Post by foggy » Mar 21, 2013 9:05 pm

Sdelete will indeed eliminate the need to copy unused blocks (zeroed ones), however defragmentation itself still changes a lot of blocks so typically first increment will be larger than usual. Please review this related topic, could be helpful.

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