<HTML dir=ltr><HEAD><TITLE>[Mauiusers] Questions regarding "tasks" and the cfg file.</TITLE>
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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>what batch queue are you using? are the nodes showing up as available to your queue? for example, if you're using torque, what is the output of the command `pbsnodes -a`? </FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>--Joe</FONT></DIV></DIV>
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<FONT face=Tahoma size=2><B>From:</B> mauiusers-bounces@supercluster.org on behalf of Michael Homa<BR><B>Sent:</B> Wed 9/17/2008 12:12 PM<BR><B>To:</B> mauiusers@supercluster.org<BR><B>Subject:</B> [Mauiusers] Questions regarding "tasks" and the cfg file.<BR></FONT><BR></DIV>
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<P><FONT size=2>Hello:<BR><BR>I'm doing the initial configuration for maui (maui-3.2.6p20) on a<BR>university-based cluster. I've configured a very basic configuration file<BR>which I've hacked to death trying to solve this issue. Two key lines:<BR><BR>NODECFG[argo17-1] MAXJOB=10<BR>CLASSCFG[dedicated] MAXPROC=12<BR><BR>In order to test, I wrote a simple hello_world program in C. When I submit<BR>the program for execution, I see that the number of tasks is 6:<BR><BR>Job ID Username Queue Jobname SessID NDS TSK Memory Time S Time<BR>317 mhoma dedicate hello_worl -- 1 6 --- 00:30 Q --<BR><BR>and the job remains queued because:<BR> "job cannot run in partition DEFAULT (idle procs do not meet requirements<BR>: 0 of 6 procs found)"<BR><BR>The dedicated queue has three dual CPU, dual cores and was established in<BR>torque:<BR><BR> argo17-1 np=4 Linux2.i86pc dualcore amd smp dedicated<BR> argo18-2 np=4 Linux2.i86pc dualcore amd smp dedicated<BR> argo18-3 np=4 Linux2.i86pc dualcore amd smp dedicated<BR><BR>According to the admin manual, "by default, a task maps directly to a<BR>single processor within a job."<BR><BR> A few questions:<BR><BR> 1) What configuration variable controls this setting? In other words,<BR> how does one change maui so that a single processor can handle<BR> multiple tasks from the same job. By its very nature, a hello_world<BR> stub should not require six processors. Of course, my job will<BR> queue; it's asking for six processors and there are only four<BR> available. But, I'm surprised that the message says "0 of 6 found".<BR><BR> 2) I'm unclear as to how the "task" number is derived? I noticed that<BR> my hello_world has a PE of 6. Is that a coincidence or does the<BR> resulting PE become the number of tasks? Why six processors for<BR> hello_world?<BR><BR>I'm new to Maui so if I'm asking dumb questions, chalk it up to being an<BR>idiot.<BR><BR>Michael Homa<BR>Operating Systems Support and Database Group<BR>Academic Computing and Communication Center<BR>University of Illinois at Chicago<BR>email: mhoma@uic.edu<BR>_______________________________________________<BR>mauiusers mailing list<BR>mauiusers@supercluster.org<BR><A href="http://www.supercluster.org/mailman/listinfo/mauiusers">http://www.supercluster.org/mailman/listinfo/mauiusers</A><BR></FONT></P></DIV></BODY></HTML>