> Robert, > > On 8/8/06 9:11 AM, "Robert Milkowski" > <[EMAIL PROTECTED]> wrote: > > > 1. UFS, noatime, HW RAID5 6 disks, S10U2 > > 70MB/s > > 2. ZFS, atime=off, HW RAID5 6 disks, S10U2 (the > same lun as in #1) > > 87MB/s > > 3. ZFS, atime=off, SW RAID-Z 6 disks, S10U2 > > 130MB/s > > 4. ZFS, atime=off, SW RAID-Z 6 disks, snv_44 > > 133MB/s > > Well, the UFS results are miserable, but the ZFS > results aren't good - I'd > expect between 250-350MB/s from a 6-disk RAID5 with > read() blocksize from > 8kb to 32kb. > > Most of my ZFS experiments have been with RAID10, but > there were some > massive improvements to seq I/O with the fixes I > mentioned - I'd expect that > this shows that they aren't in snv44. > > - Luke
I dont think there is much chance of achieving anywhere near 350MB/s. That is a hell of a lot of IO/s for 6 disks+raid(5/Z)+shared fibre. While you can always get very good results from a single disk IO, your percentage gain is always decreasing the more disks you add to the equation. >From a single 200MB/s fibre, expect some where between 160-180MB/s, at best. Doug This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
