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<TITLE>Summary of today's meeting</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Here is a summary of what I think that we agreed to today. Please correct any errors, and add what I am missing.<BR>
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</SPAN></FONT><UL><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>We need to be able to restore MPI_COMM_WORLD (and it’s derivatives) to a usable state when a process fails.
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Restoration may involve having MPI_PROC_NULL replace the lost process, or may replaced the lost processes with a new process (have not specified how this would happen)
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Processes communicating directly with the failed processes will be notified via a returned error code about the failure.
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>When a process is notified of the failure, comm_repair() must be called. Comm_repair() is not a collective call, and is what will initiate the communicator repair associated with the failed process.
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>If a process wants to be notified of process failure even if it is not communicating directly with this process, it must register for this notification.
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>We don’t have enough information to know how to continue with support for checkpoint/restart.
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>We need to discuss what needs to do with respect to failure of collective communications.<BR>
</SPAN></FONT></UL><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
There are several issues that came up with respect to these, which will be detailed later on.<BR>
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Rich<BR>
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