ZFSv28 Dedup question

James L. Lauser james at jlauser.net
Tue Jun 21 03:16:02 UTC 2011

I have a (hopefully) simple question about ZFSv28 deduplication that is not
very clearly answered in any of the documentation I've found.

If I enable dedupe on a dataset, will newly written data dedupe against old
data that was written before dedupe was enabled?  If not, is it worth
forcing the data to be rewritten so that it makes it into the appropriate

--  James L. Lauser
    james at jlauser.net

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