[linux-lvm] Data deduplication in LVM?

[Roy Sigurd Karlsbakk]

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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