On Thu, Jan 14, 2010 at 03:41:17PM -0800, Richard Elling wrote: > > Consider a pool of 3x 2TB SATA disks in RAIZ1, you would roughly > > have 80 IOPS. Any info about the relation between ZIL <> pool > > performance? Or will the ZIL simply fill up and performance drops > > to pool speed? > > The ZFS write performance for this configuration should consistently > be greater than 80 IOPS. We've seen measurements in the 600 write > IOPS range. Why? Because ZFS writes tend to be contiguous. Also, > with the SATA disk write cache enabled, bursts of writes are handled > quite nicely. > -- richard
That's interesting. I was under the impression that your IOPS for a zpool were limited to the slowest drive in a vdev -- times the number of vdevs. Ray _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
