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Subject: Re: [OMPI devel] PLM consistency: launch agent param
From: Don Kerr (Don.Kerr_at_[hidden])
Date: 2008-07-11 10:41:20

For something as fundamental as launch do we still need to specify the
component, could it just be "launch_agent"?

Jeff Squyres wrote:
> Sounds good to me. We've done similar things in other frameworks --
> put in MCA base params for things that all components could use. How
> about plm_base_launch_agent?
> On Jul 11, 2008, at 10:17 AM, Ralph H Castain wrote:
>> 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....
>> Ralph
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