Tim Thomas wrote: > if I create a storage pool with multiple RAID-Z stripes in it does ZFS > dynamically stripe data across all the RAID-Z stripes in the pool > automagically ? > > If I relate this back to my storage array experience, this would be > "Plaiding" which is/was creating a RAID-0 logical volume across multiple > h/ware RAID-5 stripes. > I did this one week ago, while trying to get at least bit of random read performance out of a X4500. Normal RAIDZ(2) performance has been between 0.8 and 5 MB/s, which was way too slow for our needs, so I used striped RAIDZ to get a boost.
My test configuration: c5t0/t4: system (mirrored) c5t1/t5 - c5t3/t7: AVS bitmap volumes (mirrored) This left 40 disks. I've created 13x RAIDZ with 3 disks each, that's 39 disks in total. The script I used is appended below. And yes, it results in striped RAIDZ arrays (I call it "RAIDZ0"). And my data throughput was 13 times higher, as expected. Hope this will help you a bit. --- #!/bin/sh /usr/sbin/zpool create -f big raidz c0t0d0s0 c1t0d0s0 c4t0d0s0 spare c7t7d0s0 /usr/sbin/zpool add -f big raidz c6t0d0s0 c7t0d0s0 c0t1d0s0 /usr/sbin/zpool add -f big raidz c1t1d0s0 c4t1d0s0 c6t1d0s0 /usr/sbin/zpool add -f big raidz c7t1d0s0 c0t2d0s0 c1t2d0s0 /usr/sbin/zpool add -f big raidz c4t2d0s0 c6t2d0s0 c7t2d0s0 /usr/sbin/zpool add -f big raidz c0t3d0s0 c1t3d0s0 c4t3d0s0 /usr/sbin/zpool add -f big raidz c6t3d0s0 c7t3d0s0 c0t4d0s0 /usr/sbin/zpool add -f big raidz c1t4d0s0 c4t4d0s0 c6t4d0s0 /usr/sbin/zpool add -f big raidz c7t4d0s0 c0t5d0s0 c1t5d0s0 /usr/sbin/zpool add -f big raidz c4t5d0s0 c6t5d0s0 c7t5d0s0 /usr/sbin/zpool add -f big raidz c0t6d0s0 c1t6d0s0 c4t6d0s0 /usr/sbin/zpool add -f big raidz c6t6d0s0 c7t6d0s0 c0t7d0s0 /usr/sbin/zpool add -f big raidz c1t7d0s0 c4t7d0s0 c6t7d0s0 /usr/sbin/zpool status --- -- Ralf Ramge Senior Solaris Administrator, SCNA, SCSA Tel. +49-721-91374-3963 [EMAIL PROTECTED] - http://web.de/ 1&1 Internet AG Brauerstraße 48 76135 Karlsruhe Amtsgericht Montabaur HRB 6484 Vorstand: Henning Ahlert, Ralph Dommermuth, Matthias Ehrlich, Andreas Gauger, Matthias Greve, Robert Hoffmann, Norbert Lang, Achim Weiss Aufsichtsratsvorsitzender: Michael Scheeren _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
