[Lustre-discuss] MDS/MDT Performance

[Andreas Dilger]

On Jan 15, 2008  11:08 -0800, Rei Lee wrote:
> We are in the process of building a file system and
> we are wondering whether we should get disk drivers
> of 10K RPM or 15 RPM for the MDT?  How is
> the MDS performance affected by the performance
> of the underlying disk drivers used by MDT?
> Will solid-state disks provide a much better MDS
> performance?

The MDT is mostly IOPS and CPU bound, so faster disks will definitely make
a difference, as will having a lot of RAM for filesystem metadata cache.

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