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Re: [Linux-cluster] GFS: more simple performance numbers



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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