bionic (7) pmix.7.gz

NAME

       Process Management Interface - Exascale

SYNOPSIS

              #include <pmix.h>

OVERVIEW

       The  Process Management Interface (PMI) has been used for quite some time as a means of exchanging wireup
       information needed for interprocess communication.  Two versions (PMI-1 and PMI-2) have been released  as
       part of the MPICH effort.  While PMI-2 demonstrates better scaling properties than its PMI-1 predecessor,
       attaining rapid launch and wireup of the roughly 1M processes executing across 100k  nodes  expected  for
       exascale operations remains challenging.

       PMI  Exascale (PMIx) represents an attempt to resolve these questions by providing an extended version of
       the PMI standard specifically designed to support clusters up  to  and  including  exascale  sizes.   The
       overall  objective  of  the  project is not to branch the existing pseudo-standard definitions - in fact,
       PMIx fully supports both of the existing PMI-1 and PMI-2 APIs - but rather  to  (a)  augment  and  extend
       those  APIs  to  eliminate some current restrictions that impact scalability, and (b) provide a reference
       implementation of the PMI-server that demonstrates the desired level of scalability.

SEE ALSO

AUTHORS

       PMIx.