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



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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