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<TITLE>Re: [Mpi3-ft] Transactional Messages</TITLE>
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On 2/23/08 1:18 AM, "Greg Bronevetsky" <bronevetsky1@llnl.gov> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><BLOCKQUOTE><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>Just to follow up, I think that the “right” thing to do with respect to some sort of<BR>
transactional model is to have some sort of standard way to request such <BR>
communications take place – probably at init time. We have had such an MPI<BR>
implementation running in production for several years on a multi-thousand<BR>
process cluster, and the only thing that needs to be exposed to the users is the<BR>
ability to turn on/off the functionality – all the rest is taken care of just fine within<BR>
the context of the MPI 2.0 standard, and is 100% standard compliant.<BR>
</SPAN></FONT></BLOCKQUOTE><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>Cool! Can you post the API for this thing? Might be a useful thing to start from. Also, its a prototype implementation.<BR>
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>> There is not new API, would just need to pass some sort of parameter to MPI_Init(). This<BR>
>> is not the only place this is needed. If you want to take a look at the implementation, take<BR>
>> a loot at http://</SPAN></FONT><FONT SIZE="4"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'>public.lanl.gov/lampi<BR>
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Rich<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>This does not deal with hints on the network “state”.<BR>
</SPAN></FONT></BLOCKQUOTE><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>Yeah, I'm not sure if such hints are valuable enough to be included in the spec. It really falls under the quality-of-service ideas what we've tossed around, so we should write up a proposal for those and see how much QoS people really want.<BR>
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Greg Bronevetsky<BR>
Post-Doctoral Researcher<BR>
1028 Building 451<BR>
Lawrence Livermore National Lab<BR>
(925) 424-5756<BR>
bronevetsky1@llnl.gov<BR>
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