[Linux-cluster] Very poor performance of GFS2

[David Teigland]

On Thu, Jun 21, 2007 at 12:57:03PM +0200, Jordi Prats wrote:
> Hi all,
> I'm getting a very poor performance using GFS2. Here some numbers:
> 
> A disk usage on a GFS2 filesystem:
> 
> [root at urani CLUSTER]# time du -hs PostgreSQL814/postgresql-8.1.4/
> 121M    PostgreSQL814/postgresql-8.1.4/
> 
> real    5m49.597s
> user    0m0.000s
> sys     0m0.004s
> 
> 
> On the local disk:
> 
> [root at urani CLUSTER]# time du -hs postgresql-8.1.4/
> 116M    postgresql-8.1.4/
> 
> real    0m0.015s
> user    0m0.000s
> sys     0m0.016s

You should compare with gfs1, that will tell you if the gfs2 numbers are
in the right ballpark.

Dave