[Lustre-discuss] Modifying Lustre network (good practices)

[Johann Lombardi]

On Thu, May 20, 2010 at 10:43:58AM -0400, Brian J. Murrell wrote:
> On Thu, 2010-05-20 at 16:27 +0200, Olivier Hargoaa wrote: 
> > 
> > On Lustre we get poor read performances 
> > and good write performances so we decide to modify Lustre network in 
> > order to see if problems comes from network layer.
> 
> Without having any other information other than your statement that
> "performance is good in one direction but not the other" I wonder why
> you consider the network as being the most likely candidate as a culprit
> for this problem.

Maybe you should start with running lnet self test to compare read & write
performance?

http://wiki.lustre.org/manual/LustreManual18_HTML/LustreIOKit.html#50598014_pgfId-1290255

Johann