[Linux-cluster] GFS: more simple performance numbers
Daniel Phillips
phillips at redhat.com
Tue Oct 19 18:11:43 UTC 2004
On Tuesday 19 October 2004 14:05, Derek Anderson wrote:
> I've rerun the simple performance tests originally run by Daniel
> McNeil with the addition of the gulm lock manager on the 2.6.8.1
> kernel and GFS 6.0 on the 2.4.21-20.EL kernel.
...
> gfs dlm 1 node tar 0m19.480s 0m0.474s 0m8.975s
...
> gfs gulm 1 node tar 0m36.568s 0m0.491s 0m7.831s
Single node performance is heavily dependent on the lock manager(!).
How about with nolock?
> du -s linux-2.6.8.1 (after untar):
> ----------------------------------
> real user sys
> ext3 0m0.103s 0m0.018s 0m0.055s
>
> gfs dlm 1 node 0m5.149s 0m0.041s 0m1.905s
...
> gfs gulm 1 node 0m0.355s 0m0.025s 0m0.330s
Elephant hiding under the rug...
Regards,
Daniel
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