On Dec 19, 2006, at 7:14 AM, Mike Seda wrote:
Anton B. Rang wrote:
I have a Sun SE 3511 array with 5 x 500 GB SATA-I disks in a RAID
5. This
2 TB logical drive is partitioned into 10 x 200GB slices. I gave
4 of these slices to a Solaris 10 U2 machine and added each of
them to a concat (non-raid) zpool as listed below:
This is certainly a supportable configuration. However, it's not
an optimal one.
What would be the optimal configuration that you recommend?
If you don't need ZFS redundancy, I would recommend taking a single
"slice" for your ZFS file system (e.g. 6 x 200 GB for other file
systems, and 1 x 800 GB for the ZFS pool). There would still be
contention between the various file systems, but at least ZFS would
be working with a single contiguous block of space on the array.
Because of the implicit striping in ZFS, what you have right now is
analogous to taking a single disk, partitioning it into several
partitions, then striping across those partitions -- it works, you
can use all of the space, but there's a rearrangement which means
that logically contiguous blocks on disk are no longer physically
contiguous, hurting performance substantially.
Yes, I am worried about the lack of redundancy. And, I have some
new disks on order, at least one of which will be a hot spare.
Glad to hear it.
Anton
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
