[CentOS] Is GFS for HPC?

[Rainer Duffner]

Am 27.02.2009 um 01:44 schrieb Joe Barjo:

> I'd also like to test gfs for a 30 nodes cluster with sge.
> Tasks are often quite short, files are also quite small. Job rate  
> can be quite high (can reach 10 to 20/second)
> We actualy use NFS under centos4.7 and experience coherency problems.
> I tested AFS, lustre, glusterFS. All showed too much overhead with  
> small files, and less performance than nfs.
>
> The coherency problem seems related to the ext3 timestamp resolution  
> (1 second), and the poor NFS cache system. It is not coherent even  
> with the noac (no attribute cache option)
>
> First GFS test on 6 nodes (with gnbd) were ok, but there had been  
> unexplained kernel panics (even when not working) that prevented  
> further tests.
>
> I will try to upgrade the cluster to a more recent distribution and  
> test GFS on 30 nodes.
>


What's your NFS-server, BTW?



Rainer