The two files have a slightly different format and completely different meaning. The hostfile specifies how many slots are on a node. The rankfile specifies a rank and what node/slot it is to be mapped onto.<div><br></div>
<div>Rankfiles can use relative node indexing and refer to nodes received from a resource manager - i.e., without any hostfile.</div><div><br></div><div>So the files are intentionally quite different. Trying to combine them would be rather ugly.</div>
<div>Ralph</div><div><br></div><div><br><div class="gmail_quote">On Thu, Jun 18, 2009 at 1:52 PM, Eugene Loh <span dir="ltr">&lt;<a href="mailto:Eugene.Loh@sun.com">Eugene.Loh@sun.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
In order to use &quot;mpirun --rankfile&quot;, I also need to specify hosts/hostlist.  But that information is redundant with what I provide in the rankfile.  So, from a user&#39;s point of view, this strikes me as broken.  Yes?  Should I file a ticket, or am I missing something here about this functionality?<br>

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