First time accepted submitter ltjohhed writes "We've been using deduplication products, for backup purposes, at my company for a couple of years now (DataDomain, NetApp etc). Although they've fully satisfied the customer needs in terms of functionality, they don't come across cheap — whatever the brand. So we went looking for some free dedup software. OpenSolaris, using ZFS dedup, was there first that came to mind, but OpenSolaris' future doesn't look all that bright. Another possibility might be utilizing LessFS, if it's fully ready. What are the slashdotters favourite dedup flavour? Is there any free dedup software out there that is ready for customer deployment?" Possibly helpful is this article about SDFS, which seems to be along the right lines; the changelog appears stagnant, though, although there's some active discussion.
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