Re: Data Deduplication with the help of an online filesystem check

Thomas Glanzmann
2009-04-28T17:43:38Z

Hello,

> It is possible, there's room in the metadata for about about 4k of
> checksum for each 4k of data. The initial btrfs code used sha256, but
> the real limiting factor is the CPU time used.

I see. There a very efficient md5 algorithms out there, for example,
especially if the code is written in assembler.

Thomas