<br><br><div class="gmail_quote">On Wed, Aug 11, 2010 at 3:47 PM, Gerald Creager <span dir="ltr"><<a href="mailto:gerry.creager@tamu.edu">gerry.creager@tamu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
On the system I'm working with, I can't use the MPICH envVars such as:<br>
MPICH_MPIIO_HINTS_DISPLAY 1<br>
MPICH_MPIIO_HINTS “wrfout*:striping_factor=64”<br>
<br>
Therefore, to set striping on the wrfout files, with a Lustre file system and SGE for the batch queuing environment, I've gotta find where the wrfout file creation instance occurs and add a couple lines of code to make it create the wrfouts with stripe-counts appropriately set (somewhere between 16-64, I think). What I intend to do eventually, is to get that folded back into WRF as a namelist parameter, so that those of us using pnetcdf (needed if proc count gets past ~512 or so on this system) can have a simplified granular method of using striping on parallel file systems (specifically with pnetcdf).<br>
<br>
I've looked at Johnsen's work to use Lustre on the Cray XT5. It dowsn't apply to my environment, more's the pity.<br>
<br></blockquote><div><br></div><div><br></div><div>I see. It was Pete Johnsen who helped me out, on our XT5, so it doesn't sound like I have any info that would help you...</div><div><br></div></div><br>-- <br>Arctic Region Supercomputing Center<br>
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