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Netbackup and Data Domain compression

Denzo
Level 3
Certified

‎04-07-2009 01:39 AM

I am using Netbackup and backing up to 7 Data Domains. Backups to 6 of the data domains have a compression of 13%, but the 7th one has a compression of only 8% and I'm running out of space. Any idea ( Possible causes )as to why I have only 8% compression?
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1 REPLY 1

John_Stockard
Level 5
Partner Certified

‎07-29-2009 02:10 PM

Are you sending different data sets to the different Data Domain units?  You can get poor levels of de-duplication from files that are already compressed (JPEG, MPEG, ZIP, gzip, etc.), or if you've turned on client-side compression in your NetBackup backup policies, or if the files are encrypted (either by NetBackup encryption or if the content of the files have been encrypted by third-party software such as PGP or TrueCrypt).

Are all of the Data Domain units running the same firmware version?
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