[linux-lvm] Data deduplication for Linux : lessfs

[Roy Sigurd Karlsbakk]

On 24. juni. 2009, at 17.12, Mark Ruijter wrote:

> For those who need OpenSource data deduplication today instead of
> tomorrow one might take a look at lessfs.
> http://www.lessfs.com

It's a good idea, but given the current traffic on the lessfs mailing  
list, I'm not sure if much work is done. I have been a member of that  
list since June 1 and haven't received more than one message, which  
was the one I wrote myself.
>
> I am thinking about starting to work on a data deduplicating
> blockdevice, a kernel module called blockless.

If done smartly, this may perhaps be possible, but the problem is the  
filesystem's metadata. Is this going to be dedup'ed? How much will  
this take? A simple backup will update atime on all the files backed  
up, and although atime isn't always wanted or needed, the problem  
occurs elsewhere.

roy
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Roy Sigurd Karlsbakk
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