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Can anyone explain these de-dupe ratios?

robnicholson
Level 6

Can anyone explain these rather variable de-dupe ratios:

http://www.picpaste.com/Dedupe_ratios-5EYfQ7BK.png

This is a full backup of the same 1.5GB of data been performed five times one after the other. The first 1.3:1 is the initial backup and shows there was a little bit of duplication in there. But the others are:

1303.9:1
507:1
5320:1
1833:1

This is the same data been backed up each time so the de-duplication is total, i.e. every single 64k block should already be in the database.

Should not the de-duplication ratio be at least the same each time?

Confused of Manchester...Rob

1 ACCEPTED SOLUTION

Accepted Solutions

Riyaj_S
Moderator
Moderator
Employee Accredited Certified

You may refer to following Technote to better understand this ::

http://www.symantec.com/docs/TECH146827

Hope this helps.

View solution in original post

1 REPLY 1

Riyaj_S
Moderator
Moderator
Employee Accredited Certified

You may refer to following Technote to better understand this ::

http://www.symantec.com/docs/TECH146827

Hope this helps.