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Backup Exec 2012 - Deduplication and SW Compression

Created: 04 Dec 2012 • Updated: 06 Feb 2013 | 1 comment
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Hi all smiley

I'm aware that my question was raised a couple of times, but mostly for older versions and well, the answer is still not clear to me.

We've just installed the latest Backup Exec 2012 VRay to backup our Vsphere cluster and some physical machines. So far I can say it's a great backup solution. We do backup to deduplication disk storage and backup to a tape library.

After setting up a bunch of backup jobs to the dedupe storage we're getting this messages every day -

The job has been configured for either data encryption or software compression, or both. The job is also targeted to a device that is capable of data deduplication. Encryption and compression of the backup data can prevent much of the data from being deduplicated

All jobs to the dedup storage are configured as client-side deduplication with the SW compression option enabled in the GUI. No encryption and no manual modifications in config files.

Now, is that really an issue? Does SW compression enabled in the GUI for client-side deduplication jobs affect the deduplication function negatively?

Our target is a high dedupe ratio to have the lowest possible network traffic and the most efficient time for a job to be completed.

What is the best practice you can recommend?

Thanks, Christian

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pkh's picture

Compressed data deduplicate badly due to the randomness of the data.  If you want to compress your data in the dedup folder, enable compression in the dedup engine.  See this document