<div dir="ltr"><div><font face="tahoma,sans-serif">Hi,</font></div><div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif">In MPI22 Standard document [</font><font face="tahoma,sans-serif"><a href="http://www.mpi-forum.org/docs/mpi-2.2/mpi22-report.pdf" target="_blank"><b><font color="#3333ff">1</font></b></a></font><font face="tahoma,sans-serif">] on page 305 lines 27-30 we can see this paragraph:</font></div>
<div><font face="tahoma,sans-serif"> </font></div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font face="tahoma,sans-serif"><font color="#666666">The MPI Forum decided not to address resource control because it was not able to</font><font color="#666666"><br>
</font></font></blockquote><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font face="tahoma,sans-serif"><font color="#666666">design a portable interface that would be appropriate for the broad spectrum of existing</font><font color="#666666"><br>
</font></font></blockquote><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font face="tahoma,sans-serif"><font color="#666666">and potential resource and process controllers. Resource control can encompass a wide</font><font color="#666666"><br>
</font></font></blockquote><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font face="tahoma,sans-serif"><font color="#666666">range of abilities, including adding and deleting nodes from a virtual parallel machine, ...</font></font><font face="tahoma,sans-serif"><br>
</font></blockquote><font face="tahoma,sans-serif"> <br></font></div><div><font face="tahoma,sans-serif">Which means, an MPI-based cluster is not reconfigurable at run time! but in EuroPVM/MPI 2006 a reconfigurable version of MPI for HPC clusters was described by University of New Mexico Scalable Systems Lab [</font><font face="tahoma,sans-serif"><a href="http://www.pvmmpi06.org/talks/CommProt/venkata.pdf" target="_blank"><b><font color="#3333ff">2</font></b></a></font><font face="tahoma,sans-serif">] and they show that their implementation will enhance performance (the main goal of MPI). So, why in MPI22 standard "<i>The MPI forum decided not to address resource control</i>" which can improve both flexibility and performance of an MPI-based cluster?</font></div>
<div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif">Ref:</font></div><div><font face="tahoma,sans-serif"><a href="http://www.springerlink.com/content/w588601267363238/">MPI/CTP: A Reconfigurable MPI for HPC Applications</a></font></div>
<div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif"> <br clear="all"></font></div>Regards,<br>Siavash<br>
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