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

[Roy Sigurd Karlsbakk <roy karlsbakk net>]

On 10. juni. 2009, at 20.54, Les Mikesell 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?

roy
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Roy Sigurd Karlsbakk
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