[mpi-forum] MPI-3 Collectives Workgroup

Torsten Hoefler htor at cs.indiana.edu
Wed Feb 6 13:59:10 CST 2008

Dear MPI Forum,
we want to publically announce the MPI-3 Collectives workgroup. This
email will be the only mail regarding the workgroup that will be sent to
the MPI Forum mailinglist. All followup discussions should be directed
to the mpi3-coll [1] mailinglist. 

The current topics of the workingroup include:
1) non-blocking collective operations
2) topological collective operations (associated with topological
3) sparse collective communication (extended definition of parnership
   relations and communicated data)
4) new collective operations (such as MPI_Reduce_scatter_block and
   MPI_Exscan_all proposed by Jesper)

Further topic proposals are welcome but we would like to see a full
proposal that is written MPI-like and can be discussed. Other
discussions might be held on the Mailinglist/Teleconferences/Wiki but
will not have proposal status (i.e., will not be presented to the full
Forum) unless the requirements mentioned above are achieved (and the
workgroup voted positively).

Policies: we use a simple majority straw-man vote per (registered)
attendee held online (note: those votes are not ratified by the
forum and will only be valid in the subgroup). Our proposals will only
be accepted by the MPI Forum if an open-source implementation is

All proposals and votes will be documented in the Wiki (URL to be

Our first teleconference will be held on February 12th at noon EST. The
call-in number will be announced on the mailinglist. 

Best Regards,
  Andrew Lumsdaine and Torsten Hoefler

[1]: http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-coll

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