Increasingly slow performance

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Posts: 2
Comments: 4

Hi,

I have vmprotect 8.0.8184 backing up 7 VMs on two servers (5 on one and 2 on the other.)

When I first started, incremental backups of all servers were taking approximately 30-40 minutes to complete. I used to run 3 backups per day but now I can only do 1 as it is taking 7 hours.

The amount of data that is being backed up in each task really hasn't changed that much so I am at a loss to see why it is happening.

The only thing that I can think that is the cause is the number of recovery points that I have. I have set the backup task to store 90 daily, 12 weekly and 36 monthly backups. Could this be the cause? I currently have just over 1TB of backups which I wouldn't have thought was very much.

Any suggestions would be appreciated.

Regards,

Jason.

Thu, 02/21/2013 - 05:48
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Posts: 22
Comments: 3800

Hi Jason,

The root cause here is most likely the inline deduplication functionality which has to analyze all the recovery points (the size of them does not really matter, but the number does matter) before committing data into the archive. This means that there will be performance impact depending on the amount of recovery points saved into the archive. We are considering several solutions for this issue (for example add a limit the amount of recovery points to be analyzed for deduplication) in 9th version of vmProtect. The current workaround is to disable deduplication in the backup task properties (edit task->4th step->More Options->Additional Settings).

This workaround should not significantly increase the space consumption since backups will still be saved incrementally into this archive. The difference between backup with enabled deduplication will be in the amount of recovery points analyzed. During backup with deduplication OFF there is the last recovery point analyzed for particular VM. During backup with deduplication ON there are all recovery points analyzed. In most cases (unless VMs were prepared from one same clone) analysing the last recovery point is sufficient and is only slightly less effective than analyzing all recovery points.

Thank you.
--
Best regards,
Vasily
Acronis vmProtect Program Manager

Thu, 02/21/2013 - 11:45
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