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<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
color=#0000ff><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><SPAN
style="mso-list: Ignore"><SPAN class=443123117-31032006>> </SPAN>1)<FONT
face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Is there a limit to the number of
intercommunicators you can have and, if so, are we going over that limit if we
have 24 B nodes</SPAN></FONT></FONT></P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
face=Arial color=#0000ff size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
color=#0000ff><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
class=443123117-31032006>I don't think there is a limit. You should be able to
run 24.</SPAN></SPAN></FONT></P>
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style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
color=#0000ff><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT><FONT
face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></FONT> </P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
color=#0000ff><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN style="mso-list: Ignore"><SPAN
class=443123117-31032006>> </SPAN>2)<FONT face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Would a single machine (our cluster
is down at the moment) be able to handle all the MPI communications for this
system (for testing purposes only, until our cluster is back
up)?</SPAN></FONT></FONT></P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
face=Arial color=#0000ff size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
color=#0000ff><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p><SPAN
class=443123117-31032006>You should be able to test it on one machine although
it will crawl.</SPAN></o:p></SPAN></FONT></P>
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style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
color=#0000ff><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p><SPAN
class=443123117-31032006></SPAN></o:p></SPAN></FONT> </P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><FONT
color=#0000ff><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p><SPAN
class=443123117-31032006>Rajeev</SPAN></o:p></SPAN></FONT></P></FONT></DIV><BR>
<BLOCKQUOTE dir=ltr
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<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> owner-mpich-discuss@mcs.anl.gov
[mailto:owner-mpich-discuss@mcs.anl.gov] <B>On Behalf Of </B>Yoder, Jeffrey -
SSD<BR><B>Sent:</B> Friday, March 31, 2006 8:56 AM<BR><B>To:</B> MPICH
Discussion Group<BR><B>Subject:</B> [MPICH] Intercommunicator
limits<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">We have an architecture where we
have a single process (A), with multiple send threads, that is parsing a data
file and parcelling it out, using a load-balancing scheme, to n different
processing nodes (B1 – Bn). These B nodes each also have a dedicated
receive thread associated to the A node by means of an
intercommunicator. A similar setup is used on the backend where the B
nodes have dedicated send threads all tied via intercommunicators to receive
threads in node C where the processed data is all collected and put into our
output format.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Our questions
are:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><![if !supportLists]><FONT
face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><SPAN
style="mso-list: Ignore">1)<FONT face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Is there a limit to the number of
intercommunicators you can have and, if so, are we going over that limit if we
have 24 B nodes</SPAN></FONT><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l1 level1 lfo2"><![if !supportLists]><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="mso-list: Ignore">2)<FONT face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Would a single machine (our
cluster is down at the moment) be able to handle all the MPI communications
for this system (for testing purposes only, until our cluster is back
up)?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>