Mike Gerdts wrote:
On Mon, Nov 2, 2009 at 7:20 AM, Jeff Bonwick <jeff.bonw...@sun.com> wrote:
Terrific! Can't wait to read the man pages / blogs about how to use it...
Just posted one:
http://blogs.sun.com/bonwick/en_US/entry/zfs_dedup
Enjoy, and let me know if you have any questions or suggestions for
follow-on posts.
Jeff
On systems with crypto accelerators (particularly Niagara 2) does the
hash calculation code use the crypto accelerators, so long as a
supported hash is used?
Not yet, it is coming. Currently ZFS has a private copy of SHA256 (for
legacy reasons). I have an RTI pending to switch it to the same copy
that the crypto framework uses. That is an optimised software
implementation (SPARC, Intel and AMD64) but won't yet use the Niagara 2
or on chip crypto. There is an issue with very early boot and the
crypto framework I have to resolve so that will come later.
> Assuming the answer is yes, have performance
comparisons been done between weaker hash algorithms implemented in
software and sha256 implemented in hardware?
I've done some comparisons on that.
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