Roch Bourbonnais wrote: > > Le 28 févr. 08 à 20:14, Jonathan Loran a écrit : > >> >> Quick question: >> >> If I create a ZFS mirrored pool, will the read performance get a boost? >> In other words, will the data/parity be read round robin between the >> disks, or do both mirrored sets of data and parity get read off of both >> disks? The latter case would have a CPU expense, so I would think you >> would see a slow down. >> > > 2 disks mirrored together can read data faster than a single disk. > So to service a read only one side of the mirror is read. > > Raid-Z parity is only read in the presence of checksum errors. That's what I suspected, but I'm glad to get the final word on this. BTW, I guess I should have said checksums instead of parity. My bad.
Thanks, Jon _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
