Re: [linux-lvm] Data deduplication in LVM?

[Les Mikesell <lesmikesell gmail com>]

Roy Sigurd Karlsbakk wrote:
> > Roy Sigurd Karlsbakk wrote:
> > > Hi all
> > > I've been reading up a little about data deduplication, and have been 
> > > in search for an OSS filesystem with dedup without much luck. While 
> > > testing snapshots and so on in LVM, I started wondering if dedup 
> > > would be better off in LVM than in the filesystem. Would it be 
> > > possible/efficient to add dedup to the LVM layer, or perhaps a layer 
> > > above LVM? This could make dedup work for all or most of filesystems. 
> > > Make a hash table with 4k (or whatever) blocks, make virtual blocks 
> > > pointing to the physical blocks and run a remapping/deduping job at 
> > > night. If written to, copy-on-write could be used to increase speed.
> > > Is this nonsense, or might it be an idea?
> >
> > This is "supposed" to be coming in the next OpenSolaris/ZFS release 
> > (per the roadmap with the just-released 2009.06 version).
>
>
> What about Linux/LVM? Or did I misunderstand you?

I thought the question was about OSS...  I wouldn't hold my breath 
waiting for a Linux/LVM version - and for that matter I'll believe the 
ZFS release when I see it, but at least it is being planned and could be 
less than a year away.

--
  Les Mikesell
   lesmikesell gmail com