<div dir="ltr"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><font color="#666666"><font size="2"><font face="tahoma,sans-serif"><span style="color: #1f497d"><span>1)<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: 400; line-height: normal">
</span></span></span><span style="color: #1f497d"> The 2.2 standard was an update to the 2.0 standard which
predates the 2006 paper you referenced. 2.2 only introduced new functions
where there was an urgent need. New features are intended for the forthcoming
3.0.</span></font></font></font></blockquote><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 forum was unable to reach a consensus, and rather than make a poor specification, they left it undefined.</font></font></blockquote>
<div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif">Now I completely got the "Why?" answer. Thanks.</font></div><div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif"> </font></div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><font size="2"><font color="#666666"><font face="tahoma,sans-serif"><span style="color: #1f497d"><span>2)<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: 400; line-height: normal">
</span></span></span><span style="color: #1f497d"> The resource control paragraph is in the context of process
creation and my quick 1 minute scan of the paper you referenced indicates that
it is discussing reconfiguring communication and does not talk about dynamic
processes. </span></font></font></font></blockquote><div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif"> </font></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 size="2"><font color="#666666">Note that the info argument to the spawn routines, for example, provides a way to communicate with a resource manager; it was an explicit goal of the design of info to provide this way to communication information that is outside of the specification</font></font></font></blockquote>
<div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif">As you said, That paragraph is in the context of process creating and yes! my question was about runtime reconfiguration of an MPI cluster (</font><font face="tahoma,sans-serif">whole</font><font face="tahoma,sans-serif">) based on dynamic application requirements</font><font face="tahoma,sans-serif">. But </font><font face="tahoma,sans-serif">I think that would be impossible without having a flexible resource control. When a new node joins a cluster some pre-works must be done to enable that new node act as a member of that cluster (in run time), also, some one must be informed about new resources which just have been added to the cluster by entrance of new node and I think all these preparations need that missing flexible resource manager.</font></div>
<div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif"> </font></div><div><font face="tahoma,sans-serif"> </font></div><div>Regards,<br></div><div>Siavash<br></div></div>