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<TITLE>NASTRAN: Compute Node question</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Hello:</FONT>
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<P><FONT SIZE=2 FACE="Arial">We are trying to run NASTRAN on a Scyld beowulf cluster. The license authorization is provided by a Windows server on the same subnet. </FONT></P>
<P><FONT SIZE=2 FACE="Arial">- No problem if the job runs on the master node. Problem is I can only run it on the master node...</FONT>
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<P><FONT SIZE=2 FACE="Arial">- Job will not run on a compute node. I use the following command.</FONT>
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<P><FONT SIZE=2 FACE="Arial"> mach 37%<B><I> bpsh 5 nast_perl</I></B></FONT>
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<P><FONT SIZE=2 FACE="Arial">(</FONT><I><FONT SIZE=2 FACE="Arial">nast_perl</FONT></I> <FONT SIZE=2 FACE="Arial">is a perl script that runs nastran by executing </FONT>
<BR><I><FONT SIZE=2 FACE="Arial">system "nastran scr=yes nastran_example.bdf</FONT></I><FONT SIZE=2 FACE="Arial">"</FONT>
<BR><FONT SIZE=2 FACE="Arial">inside the script.</FONT>
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<P><FONT SIZE=2 FACE="Arial">The compute node is unable to get license authorization. The message looks this:</FONT>
<BR><FONT SIZE=2 FACE="Arial">====================================================================</FONT>
<BR><FONT SIZE=2 FACE="Arial">MSC.Nastran V2005.0 (AMD Linux 2.4.21-40.EL.301u0030smp) Tue Oct 9 13:36:59 2007</FONT>
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<P><FONT SIZE=2 FACE="Arial">*** USER FATAL MESSAGE (pgm: nastran, fn: validate_authorize)</FONT>
<BR><FONT SIZE=2 FACE="Arial"> authorize=1700@xxx.xx.xxx.xx (Env: MSC_LICENSE_FILE)</FONT>
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<P><FONT SIZE=2 FACE="Arial"> Host "xxx.xx.xxx.xx" is unknown in this network.</FONT>
<BR><FONT SIZE=2 FACE="Arial">====================================================================</FONT>
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<P><FONT SIZE=2 FACE="Arial">The xxx.xx.xxx.xx is the license server on the network. The idea is not to run Nastran in parallel mode (or a multi threaded version of it), just run a single instance of it on a compute node. The master node has no problem.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">I am not much of an admin. But it probably useful to mention the /etc/nsswitch.conf is configured as:</FONT>
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<P><FONT SIZE=2 FACE="Arial">bootparams: nisplus [NOTFOUND=return] files</FONT>
<BR><FONT SIZE=2 FACE="Arial">ethers: files bproc beo</FONT>
<BR><FONT SIZE=2 FACE="Arial">netnasks: files</FONT>
<BR><FONT SIZE=2 FACE="Arial">networks: files</FONT>
<BR><FONT SIZE=2 FACE="Arial">protocols:files bproc beo</FONT>
<BR><FONT SIZE=2 FACE="Arial">rpc: files</FONT>
<BR><FONT SIZE=2 FACE="Arial">services: files bproc beo</FONT>
<BR><FONT SIZE=2 FACE="Arial">...</FONT>
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<P><FONT SIZE=2 FACE="Arial">Any pointers on what I should look for?</FONT>
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