On Fri, Aug 01, 2014 at 06:17:44AM -0400, Austin S Hemmelgarn wrote:
> I do think however that having the option of a background thread doing
> deduplication asynchronously is a good idea, but then you would have to
> have some way to trigger it on individual files/trees, and triggering on
> writes like the autodefrag thread does doesn't make much sense. Having
> some userspace program to tell it to run on a given set of files would
> probably be the best approach for a trigger. I don't remember if this
> kind of thing was also included in the online deduplication patches that
> got posted a while back or not.
IIRC the proposed implementation only merged new writes with existing
data.
For the out-of-band ("off-line") dedup there's bedup
(https://github.com/g2p/bedup) or Mark's duperemove tool
(https://github.com/markfasheh/duperemove) that work on a set of files.
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