Document file descriptors limit

[ompiteam]

From Pasha:

I think that this issue should be in FAQ:

http://www.open-mpi.org/community/lists/users/2006/11/2216.php

(on linux i use "ulimit -n 64000")

[ompiteam]

Imported from trac issue 1684. Created by jsquyres on 2008-12-02T18:05:58, last modified: 2008-12-03T10:48:20

[ompiteam]

Trac comment by rhc on 2008-12-03 09:54:19:

I believe I already did this:

http://www.open-mpi.org/faq/?category=large-clusters#fd-limits

Ralph

[ompiteam]

Trac comment by pasha on 2008-12-03 10:22:07:

I think we should add some copy-n-paste command line that fix the problem for supported OS:
Linux : ulimit -n 64000
X: ...

[ompiteam]

Trac comment by rhc on 2008-12-03 10:42:12:

I can/will add some text to that effect. However, I don't think we should put something that specific into the FAQ as the exact value is dependent on the cluster, size of jobs being attempted, etc.

I'll just add something specific about setting the ulimit.

Ralph

[ompiteam]

Trac comment by pasha on 2008-12-03 10:48:20:

Also it would be nice to have message error body "mca_oob_tcp_accept: accept() failed with errno 24". It will make googling simpler.

[rhc54]

Updated FAQ about this long ago