Russell R Poyner <[email protected]> wrote on 12/17/2013 11:12:07 AM:
> This is a poor comparison since we have different data sets, but it
> would appear that BackupPC's internal dedupe and compression is
> comparable to, or only slightly worse than what zfs achieves. This in
> spite of the expectation that zfs block level dedupe might find more
> duplication than BackupPC's file level dedupe.
It all depends on the type of files you're backing up.
For my database and Exchange servers, I'd do bodily harm for block-level
de-dupe. Exchange is the *worst*: I end up with huge (tens or hundreds
of GB) monolithic files that are 99.9% identical to the previous day's
backup. BackupPC won't do me a bit of good on those files, but
block-level dedupe would.
However, with "normal" files, file-level dedupe (like BackupPC) gives you
a very high percentage of block-level.
Tim Massey
Out of the Box Solutions, Inc.
Creative IT Solutions Made Simple!
http://www.OutOfTheBoxSolutions.com
[email protected]
22108 Harper Ave.
St. Clair Shores, MI 48080
Office: (800)750-4OBS (4627)
Cell: (586)945-8796
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