[Lustre-discuss] Regarding redundancy

[Andreas Dilger]

On Apr 06, 2009  15:27 -0400, Christopher Deneen wrote:
> A quick note on my setup, 40 oss's each with a md0 raid1 (The OST)
> (2x500gb) (amd x2 5400 8gb ddr2)   and a single mdt/mgs/mds (dual xeon
> quad core 32gb ddr2 4tb raid6).

There is no benefit at all to have such a large MDT filesystem, and
in fact using RAID6 will make metadata performance very bad.  You
should instead make this a RAID 1+0 with 4 or whatever drives you have.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.