[Mpi3-ft] Communicator Virtualization as a step forward

[Supalov, Alexander]

Hi,

FT must be optional to be accepted. One way is to put it into a subset, say, thru the MPI_INIT_ASSERTED proposal. Another is to add yet one MPI_INIT call that will contain a flag for FT configuration (like MPI_FT_SYNCHRONOUS, MPI_FT_ASYNCHRONOUS, etc.). This was mentioned in relation to the issue notification in the earlier fault handling=error handling proposal of mine, see https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/Fault%20Handling.

Best regards.

Alexander

-----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: Thursday, February 12, 2009 8:50 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


>Heh OK. :)  Oh well, maybe my statements can then provide some 
>motivation for users that are interested in FT at very least :).

Right, and thanks for the comments! BTW, we are specifically worrying 
about limiting the effect of the API extensions on performance. 
However, I'm not sure how we'll deal with people who want to turn FT 
off. We tossed around the idea of multiple levels of FT support but 
I'm not sure where we left it.

Greg Bronevetsky
Post-Doctoral Researcher
1028 Building 451
Lawrence Livermore National Lab
(925) 424-5756
bronevetsky1 at llnl.gov 

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