<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
I agree that the BG/P is the only system I can think of right now that
won't work with the UDP scheme you currently have, assuming that you
will run the service on a login node that has access to both compute
nodes and external world (i.e. Swift). The compute nodes
don't support Java, so you'd have to have some C/Fortran code, or maybe
some scripting language (which I don't know what kind of support there
is). If you use C or Fortran, MPI becomes a viable alternative. TCP
has always been an alternative. Anyways, if UDP doesn't work on the
BG/P, and the BG/P is the only scale large enough (today) that warrants
a connectionless protocol, then I suggest you switch to TCP (which has
worked for us well on the BG/P, and is general enough to work in most
environments) or even MPI (but you loose the generality of TCP, but
might gain performance).<br>
<br>
Ioan<br>
<br>
Mihael Hategan wrote:
<blockquote cite="mid:1207573709.27797.16.camel@blabla.mcs.anl.gov"
type="cite">
<pre wrap="">On Mon, 2008-04-07 at 12:49 +0000, Ben Clifford wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Wary of excessive optimisation of job completion notification speed in
order to get high 'trivial/useless job' numbers, when there also seem to
be problems getting shared filesystem access fast enough for non-useless
jobs. Getting a ridiculously high trivial job throughput is not (in my
eyes) a design goal of this coaster work.
</pre>
</blockquote>
<pre wrap=""><!---->
200 j/s should be enough for anybody.
Joking aside, the issue was ability to scale to large number of jobs
rather than speed. But it looks like the issue is only an issue for
monsters such as the BG/P.
</pre>
<pre wrap=""><!---->
_______________________________________________
Swift-devel mailing list
<a class="moz-txt-link-abbreviated"
href="mailto:Swift-devel@ci.uchicago.edu">Swift-devel@ci.uchicago.edu</a>
<a class="moz-txt-link-freetext"
href="http://mail.ci.uchicago.edu/mailman/listinfo/swift-devel">http://mail.ci.uchicago.edu/mailman/listinfo/swift-devel</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
===================================================
Ioan Raicu
Ph.D. Candidate
===================================================
Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
===================================================
Email: <a class="moz-txt-link-abbreviated"
href="mailto:iraicu@cs.uchicago.edu">iraicu@cs.uchicago.edu</a>
Web: <a class="moz-txt-link-freetext"
href="http://www.cs.uchicago.edu/%7Eiraicu">http://www.cs.uchicago.edu/~iraicu</a>
<a class="moz-txt-link-freetext"
href="http://dev.globus.org/wiki/Incubator/Falkon">http://dev.globus.org/wiki/Incubator/Falkon</a>
<a class="moz-txt-link-freetext"
href="http://dsl-wiki.cs.uchicago.edu/index.php/Main_Page">http://dsl-wiki.cs.uchicago.edu/index.php/Main_Page</a>
===================================================
===================================================
</pre>
</body>
</html>