Extend group operations to support bootstrap #1937
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Sometimes participants wanting to form a group have limited knowledge of their co-participants. For example, two procs may know that they "lead" their respective subgroups, but may not know the members of the other "leaders" subgroup. In this case, we need to let the two procs that know about their subgroups tell us what they know, and let the other procs simply join the collection. All we really require is that everyone know the groupID for the group they are trying to form, and that each leader know how many leaders are going to participate. We can use events under-the-covers to notify non-leaders of the group formation. This is a collaborative change with the PMIx library, so we protect PRRTE against earlier versions that lack the appropriate attribute. Signed-off-by: Ralph Castain <[email protected]>
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Sometimes participants wanting to form a group
have limited knowledge of their co-participants.
For example, two procs may know that they "lead"
their respective subgroups, but may not know the
members of the other "leaders" subgroup. In this
case, we need to let the two procs that know about their subgroups tell us what they know, and let
the other procs simply join the collection.
All we really require is that everyone know the
groupID for the group they are trying to form, and that each leader know how many leaders are going to participate. We can use events under-the-covers to notify non-leaders of the group formation.
This is a collaborative change with the PMIx library, so we protect PRRTE against earlier versions that
lack the appropriate attribute.