[Linux-cluster] GFS: more simple performance numbers

[Matt Mitchell]

> Single node performance is heavily dependent on the lock manager(!).  
> How about with nolock?

I'm also see what could be described as abysmal performance with the 
GFS, even with nolock on a single system.  I'm using the 20040913 
snapshot that was packaged for Debian by Bastian Blank.  For sake of 
comparison I was attempting to copy the linux-2.6.8.1.tar file to the 
GFS partition to attempt to reproduce this timing test, and it took 
nearly 5 minutes just to copy the one file.  This is on some slightly 
older hardware (P3-800) but I can't imagine that GFS would require a 
supercomputer to run...maybe it does?

Raw I/O and other filesystems on the same storage device work fine, so I 
have to point the finger at GFS...but I don't know where to begin in 
trying to track down the problem.  I guess I should try the latest code 
from CVS first, but I'd love to have any hints or pointers the list 
could provide...

Thanks in advance,

Matt Mitchell