> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Jim Klimov > > I tend to agree that parity calculations likely > are faster (even if not all parities are simple XORs - that would > be silly for double- or triple-parity sets which may use different > algos just to be sure).
Even though parity calculation is faster than fletcher, which is faster than sha256, it's all irrelevant, except in the hugest of file servers. Go write to disk or read from disk as fast as you can, and see how much CPU you use. Even on moderate fileservers that I've done this on (a dozen disks in parallel) the cpu load is negligible. If you ever get up to a scale where the cpu load becomes significant, you solve it by adding more cpu's. There is a limit somewhere, but it's huge. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
