> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of James > > block sizes and a ZFS 4kB recordsize* would mean much lower IOPS. e.g. > Seagate Constellations are around 75-141MB/s(inner-outer) and 75MB/s is > 18750 4kB IOPS! However I've just tested** a slow 1TB 7200 drive and got > over 6000 4kB seq write IOPS which is a lot more than the 500 I was working
For sustained throughput, I don't measure in IOPS. I measure in MB/s, or Mbit/s. For a slow hard drive, 500Mbit/s. For a fast one, 1 Gbit/s or higher. I was surprised by the specs of the seagate disks I just emailed a moment ago. 1Gbit out of a 7.2krpm drive... That's what I normally expect out of a 15krpm drive. I know people sometimes (often) use IOPS even when talking about sequential operations, but I only say IOPS for random operations. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
