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Hi,<br>
I am still working on the new feature for Falkon to avoid submitting
tasks to known bad nodes, and to perhaps do its own retries for failed
jobs with certain known errors (i.e. stale NFS handle). I should have
that ready for next week to try out. Once this new feature is in, we
could try MolDyn again to see how it behaves.<br>
<br>
About avoiding Falkon of MolDyn, I recall something about the
scalability/policies of GRAM/PBS to handle many con current jobs,
having to throttle job submissions to something around 1 job every 10
seconds (for sustained periods of time, short bursts could send
faster), and the fact that only a few 10s of nodes would be used
concurrently, even though the sites that it was running on had more
free nodes. I also think that MolDyn through GRAM/PBS was running only
1 job per node, in essence only using 1 processor of the 2 per node. I
think the largest workflow Nika was able to run over GRAM/PBS was 5
molecules, 421 jobs (but only 340 jobs in the large stage). Nika, were
there other problems you encountered?<br>
<br>
Ioan<br>
<br>
Mihael Hategan wrote:
<blockquote cite="mid:1189693293.12309.11.camel@blabla.mcs.anl.gov"
type="cite">
<pre wrap="">Very well Sir. I shall see to the priority of the issue being raised.
On Thu, 2007-09-13 at 14:09 +0000, Ben Clifford wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I think one of the main impediments to moldyn running with GRAM directly
is bug 53 which is a request for sumission rate limiting.
It might be relatively easy to implement that and see how the MolDyn
workflow behaves then.
I'm interested to see if Falkon can be avoided for this workflow.
</pre>
</blockquote>
<pre wrap=""><!---->
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
============================================
Ioan Raicu
Ph.D. Student
============================================
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/~iraicu">http://www.cs.uchicago.edu/~iraicu</a>
<a class="moz-txt-link-freetext" href="http://dsl.cs.uchicago.edu/">http://dsl.cs.uchicago.edu/</a>
============================================
============================================</pre>
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