On Mon, Sep 10, 2007 at 12:41:24PM +0200, Pawel Jakub Dawidek wrote: > And here are the results: > > RAIDZ: > > Number of READ requests: 40000. > Number of WRITE requests: 0. > Number of bytes to transmit: 695678976. > Number of processes: 8. > Bytes per second: 1305213 > Requests per second: 75 > > RAID5: > > Number of READ requests: 40000. > Number of WRITE requests: 0. > Number of bytes to transmit: 695678976. > Number of processes: 8. > Bytes per second: 2749719 > Requests per second: 158
I'm a bit surprised by these results. Assuming relatively large blocks written, RAID-Z and RAID-5 should be laid out on disk very similarly resulting in similar read performance. Did you compare the I/O characteristic of both? Was the bottleneck in the software or the hardware? Very interesting experiment... Adam -- Adam Leventhal, FishWorks http://blogs.sun.com/ahl _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
