ZFSv28 Dedup question

[James L. Lauser]

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
tables?

--  James L. Lauser
    james at jlauser.net
    http://jlauser.net/