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Subject: [OMPI users] jobs with more that 2, 500 processes will not even start
From: Lydia Heck (lydia.heck_at_[hidden])
Date: 2010-12-14 11:10:01


About 9 months ago we had a new installation with a system of 1800 cores and at
the time we found that jobs with more than 1028 cores would not start. At the
time a colleague found that setting

OMPI_MCA_plm_rsh_num_concurrent=256

help with the problem.

We have now increased our processor count to more than 2700 cores and a job with
2,500 jobs does not start.

Is there any advice?

Best wishes,

Lydia Heck
------------------------------------------
Dr E L Heck
Senior Computer Manager

University of Durham
Institute for Computational Cosmology
Ogden Centre
Department of Physics
South Road

DURHAM, DH1 3LE
United Kingdom

e-mail: lydia.heck_at_[hidden]

Tel.: + 44 191 - 334 3628
Fax.: + 44 191 - 334 3645
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