[lustre-discuss] zfs -- mds/mdt -- ssd model / type recommendation

[Scott Nolin]

I just want to second what Rick said - It's create/remove not stat of 
files where there are performance penalties. We covered this issue for 
our workload just by using SSD's for our mdt, when normally we'd just 
use fast SAS drives.

A bigger deal for us was RAM on the server, and improvements with SPL 0.6.3+

Scott

>
> It's Lustre on ZFS, especially for metadata operations that create,
> modify, or remove inodes. Native ZFS metadata operations are much
> faster than what Lustre on ZFS is currently providing. That said,
> we've gone with a ZFS-based patchless MDS, since read operations have
> always been more critical for us, and our performance is more than
> adequate.
>
> --Rick
>

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