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Subject: [OMPI devel] descriptor limits -- FAQ item
From: Eugene Loh (eugene.loh_at_[hidden])
Date: 2011-08-29 18:22:32


It seems to me the FAQ item
http://www.open-mpi.org/faq/?category=large-clusters#fd-limits needs
updating. I'm willing to give this a try, but need some help first.
(I'm even more willing to let someone else do all this, but I'm not
holding my breath.)

For example, the text sounds dated -- e.g., with references to v1.2. Is
the "road map" discussion still current?

Is the estimate of the needed number of descriptors our current best guess?

The FAQ is missing discussion of how to increase the limit. For
something like "limit/ulimit/unlimit", where should this be done? In
.login? I assume it's not sufficient simply to set this in the shell
where mpirun is executed, assuming processes will also be launched on
remote nodes. Yes?

(And, clearly, the FAQ item is missing discussion of the MCA parameter
opal_set_max_sys_limits.)