Date: Fri, 30 Aug 2002 17:36:29 -0400
From: Greg Freemyer <freemyer@NorcrossGroup.com>
Subject: re[4]: snapshot regression test try 2
To: Steve Lord <lord@sgi.com>
cc: xfs mailing list <linux-xfs@oss.sgi.com>
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Steve,

I have compiled the CVS kernel from xfs, and have tried my snapshot script on it.

It has successfully done 20 iterations.  (this is a first for me.)

Not only did it succeed at this, but the time to perform an iteration dropped drastically from using my prior kernel. 

 i.e. It typically took a couple of minutes per iteration to take the snapshot/mount it/unmount it/delete it.  Now it is taking around 10 seconds.

I have changed the iteration counter to 10,000 and I'm going to let it run over the long weekend.

Hopefully we will have a success with this pure xfs cvs kernel.

Greg

 >>  On Fri, 2002-08-30 at 10:59, Greg Freemyer wrote:
 >>  > 
 >>  > 
 >>  >  >>  I have subsequently been chasing oopses from running freeze/thaw
 >>  >  >>  on a filesystem under heavy load, but that is a different problem
 >>  >  >>  than you saw I think.
 >>  > 
 >>  > Steve,
 >>  > 
 >>  > If you can characterize the load, then you can simply replace my dd loop
 >>  with one that creates the load you need.
 >>  > 
 >>  > Maybe that will help.

 >>  The load is dbench 32, running a freeze/thaw operation every 10 seconds.
 >>  No LVM needed here. This appears to expose a hole in the inode create
 >>  and teardown logic.

 >>  Steve


 >>  -- 

 >>  Steve Lord                                      voice: +1-651-683-3511
 >>  Principal Engineer, Filesystem Software         email: lord@sgi.com


Greg Freemyer
Internet Engineer
Deployment and Integration Specialist
Compaq ASE - Tru64 v4, v5
Compaq Master ASE - SAN Architect
The Norcross Grou
www.NorcrossGroup.com