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
--
Roy Sigurd Karlsbakk
(+47) 97542685
roy@karlsbakk.net
http://blogg.karlsbakk.net/
--
I all pedagogikk er det essensielt at pensum presenteres
intelligibelt. Det er et elementært imperativ for alle pedagoger å
unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de
fleste tilfeller eksisterer adekvate og relevante synonymer på norsk.
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
