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Subject: [OMPI devel] PLM consistency: launch agent param
From: Ralph H Castain (rhc_at_[hidden])
Date: 2008-07-11 10:17:20

Since the question of backward compatibility of params came up... ;-)

I've been perusing the various PLM modules to check consistency. One thing I
noted right away is that -every- PLM module registers an MCA param to let
the user specify an orted cmd. I believe this specifically was done so
people could insert their favorite debugger in front of the "orted" on the
spawned command line - e.g., "valgrind orted".

The problem is that this forces the user to have to figure out the name of
the PLM module being used as the param is called "-mca plm_rsh_agent", or
"-mca plm_lsf_orted", name it.

For users that only ever operate in one environment, who cares. However,
many users (at least around here) operate in multiple environments, and this
creates confusion.

I propose to create a single MCA param name for this value - something like
"-mca plm_launch_agent" or whatever - and get rid of all these individual
registrations to reduce the user confusion.

Comments? I'll put my helmet on....