[Lustre-discuss] (no subject)

Hayes, Robert N robert.n.hayes at intel.com
Mon May 11 15:44:15 PDT 2009


Dave
Does the "substantial block-level device throughput regression" exist in 2.6.18-128?

/bob

-----Original Message-----
From: David Dillow [mailto:dillowda at ornl.gov] 
Sent: Monday, May 11, 2009 2:20 PM
To: Hayes, Robert N
Cc: lustre-discuss at lists.lustre.org
Subject: Re: [Lustre-discuss] (no subject)

On Mon, 2009-05-11 at 13:35 -0700, Hayes, Robert N wrote:
> While performing a single copy, single client write/read test using
> dd, we are finding that our Nehalem clients running 
> 
> 2.6.18-92.1.10.el5-lustre-1.6.5.1 
> 
> write about half the speed of our Nehalem clients running 
> 
> 2.6.18-53.1.13.el5_lustre.1.6.4.3 to three different lustre file
> systems.

We've seen a fairly substantial block-level device throughput regression
going from -53 to -92 without involving Lustre, but I've not yet had
time to run down the changes to see what could be causing it.

-- 
Dave Dillow
National Center for Computational Science
Oak Ridge National Laboratory
(865) 241-6602 office





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