[Pvfs2-users] PVFS2 & Jumbo Frames

[Robert Olson]

Thanks - interesting document!

--bob

On Nov 2, 2006, at 11:37 AM, Robert Latham wrote:

> On Thu, Nov 02, 2006 at 10:59:51AM -0600, Robert Olson wrote:
>> The nodes in my cluster have dual Gig-E nics (tigon3). I'm pondering
>> the installation of a second gigE switch to attach them all with a
>> private storage network, and run it with jumbo frames. Do you think
>> I'd see a significant performance increase with PVFS in this
>> configuration?
>
> Hi Bob
>
> We definitely expect jumbo frames to help out pvfs a lot.  Ti's had
> good results on the teragrid, for example [1].  Unfortunately, I don't
> think anyone has quantified the benefit.
>
>> I'm also curious if folks have experimented with the effects of the
>> TCP segment offload stuff that is available on these NICs.
>
> Again, should help PVFS a lot, but we've got no hard data.
>
> ==rob
>
> [1] http://www.teragridforum.org/mediawiki/index.php?title=TG-11
>
> -- 
> Rob Latham
> Mathematics and Computer Science Division    A215 0178 EA2D B059 8CDF
> Argonne National Lab, IL USA                 B29D F333 664A 4280 315B
>