journal on an ssd

Andreas Dilger adilger at
Thu Sep 11 04:10:53 UTC 2008

On Sep 10, 2008  18:05 +0200, Tobias Oetiker wrote:
> I have not tested this, but since we are putting about 16 different
> journals on this one ssd, I would assume that the loss through
> seeking between the journals would be pretty bad, and again bring
> back that inter-filesystem-dependency we were trying to loose with
> this measure.

The cost of putting the journals on 16 separate, relatively small
disk devices would probably be comparable to the cost of the SSD
and not have a single point of failure.  The journal does mostly
linear IO, so performance is probably equal or better.

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

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