On Fri, 13 Feb 2009, Andras Spitzer wrote:
So, you telling me that even if the SAN provides redundancy (HW RAID5 or RAID1), people still configure ZFS with either raidz or mirror?
When ZFS's redundancy features are used, there is decreased risk of total pool failure. With redundancy at the ZFS level, errors may be corrected. With care in the pool design, more overall performance may be obtained since a number of independent arrays may be pooled together to obtain more bandwidth and storage space.
With this in mind, if the SAN hardware is known to work very well, placing the pool on a single SAN device is still an option.
If you do use ZFS's redundancy features, it is important to consider resilver time. Try to keep volume size small enough that it may be resilvered in a reasonable amount of time.
Bob ====================================== Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
