[EMAIL PROTECTED] said: > I'm curious about your array configuration above... did you create your > RAIDZ2 as one vdev or multiple vdev's? If multiple, how many? On mine, I > have all 10 disks set up as one RAIDZ2 vdev which is supposed to be near the > performance limit... I'm wondering how much I would gain by splitting it into > two vdev's for the price of losing 1.5TB (2 disks) worth of storage.
You've probably already seen/heard this, but I haven't seen it mentioned in this thread. The consensus is, and measurements seem to confirm, that splitting it into two vdev's will double your available IOPS for small, random read loads on raidz/raidz2. Here are some references and examples: http://blogs.sun.com/roch/entry/when_to_and_not_to http://blogs.sun.com/relling/entry/zfs_raid_recommendations_space_performance http://blogs.sun.com/relling/entry/zfs_raid_recommendations_space_performance1 http://acc.ohsu.edu/~hakansom/thumper_bench.html Regards, Marion _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
