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

[Roy Sigurd Karlsbakk <roy karlsbakk net>]

On 11. juni. 2009, at 00.30, Stuart D. Gathman wrote:

> One OSS backup product that does
> deduplication is BackupPC (written in Perl).  In the backup server,  
> every file
> gets hard linked to a name in a special directory that is its md5  
> checksum
> (plus some fiddly logic to handle metadata)


This sounds like file-level deduplication. Most storage systems sing  
dedup, uses block-level dedup. NetApp is one example; they dedup  
everything with 4k blocks, doing the actual deduplication at night.

roy
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