> My question is how efficient will ZFS be, given that > it will be layered on top of the hardware RAID and > write cache?
ZFS delivers best performance when used standalone, directly on entire disks. By using ZFS on top of a HW RAID, you make your data susceptible to HW errors caused by the storage subsystem's RAID algorithm, and slow down the I/O. You should see much better performance by not creating a HW RAID, then adding all the disks in the 3320' enclosures to a ZFS RAIDZ pool. Additionally, given enough disks, it might be possible to squeeze even better performance by creating several RAIDZ vdevs and striping them. For a discussion on this aspect, please see "WHEN TO (AND NOT TO) USE RAID-Z" treatise at http://blogs.sun.com/roch/entry/when_to_and_not_to. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
