On Fri, Jun 3, 2011 at 11:22 AM, Paul Kraus <p...@kraus-haus.org> wrote: > So is there a way to read these real I/Ops numbers ? > > iostat is reporting 600-800 I/Ops peak (1 second sample) for these > 7200 RPM SATA drives. If the drives are doing aggregation, then how to > tell what is really going on ?
I've always assumed that crazy high IOPS numbers on 7.2k drives means I'm seeing the individual drive caches absorbing those writes. That's the first place those writes will "land" when coming in from the disk controller. As other posters have said, after that the drive may internally reorder and/or aggregate those writes before sending them to the platter. Eric _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
