[Mpi3-ft] Communicator Virtualization as a step forward

[Supalov, Alexander]

Thanks. How will the checkpointer-specific call talk to the MPI?

-----Original Message-----
From: mpi3-ft-bounces at lists.mpi-forum.org [mailto:mpi3-ft-bounces at lists.mpi-forum.org] On Behalf Of Greg Bronevetsky
Sent: Wednesday, February 18, 2009 5:29 PM
To: MPI 3.0 Fault Tolerance and Dynamic Process Control working Group; MPI 3.0 Fault Tolerance and Dynamic Process Control working Group
Subject: Re: [Mpi3-ft] Communicator Virtualization as a step forward


>Thanks. How will you let the MPI know the checkpoint is coming, to
>give it a fair chance to prepare to this and then recover after the
>checkpoint? This is akin to the MPI_Finalize/MPI_Init in some sense,
>midway thru the job, hence the analogy.

Just use the checkpointer-specific call. The call is going to have
checkpointer-specific semantics, so why not give it a
checkpointer-specific name? I understand that there is some use to
allowing applications to use the same name across all checkpointers
but the bar should be higher than that for adding something to the
standard. Also, right now the whole approach inherently only supports
one checkpointing protocol: synch-and-stop. If we can work out a more
generic API that supports other protocols I think that it may have
enough value to be included in the spec. Right now it still hasn't
passed the bar.

Greg Bronevetsky
Post-Doctoral Researcher
1028 Building 451
Lawrence Livermore National Lab
(925) 424-5756
bronevetsky1 at llnl.gov
http://greg.bronevetsky.com

_______________________________________________
mpi3-ft mailing list
mpi3-ft at lists.mpi-forum.org
http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-ft
---------------------------------------------------------------------
Intel GmbH
Dornacher Strasse 1
85622 Feldkirchen/Muenchen Germany
Sitz der Gesellschaft: Feldkirchen bei Muenchen
Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer
Registergericht: Muenchen HRB 47456 Ust.-IdNr.
VAT Registration No.: DE129385895
Citibank Frankfurt (BLZ 502 109 00) 600119052

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.