Hello,<br /><br />&nbsp;&nbsp;&nbsp; With openmpi-1.3,&nbsp; new mca feature is introduced namely --mca routed binomial. This ensures out of band communication to happen in binomial fashion and reduces the net socket opening and hence solves file open issues.<br /><br />-Neeraj<br />On Thu, 18 Sep 2008 16:46:23 -0700 Open MPI Users  wrote<br />  I'm just running it using mpirun from the command line. Thanks for the reply.<br />  <br />  <br />  <br />  On Thu, Sep 18, 2008 at 4:35 PM, John Hearns <hearnsj@googlemail.com _moz-userdefined=""> wrote:<br />  <br />  <br />  <br />  <br />  <br />  2008/9/18 Alex Wolfe <awolfe@soe.ucsc.edu _moz-userdefined=""><br />  <br />  <br />  Hello,<br />  <br />  I am trying to run the HPL benchmarking software on a new 1024 core cluster that we have set up. Unfortunately I'm hitting the "mca_oob_tcp_accept: accept() failed: Too many open files (24)" error known in verson 1.2 of openmpi. No matter what I set the file-descriptor limit for my account to, I am still limited to only 808 or so processes. Does anyone have any suggestions?<br />  <br />  <br />  <br />  <br />  Are you running the Linpack via a batch system or just using mpirun from the command line?<br />  <br />  If via a batch system, looks for FAQs on how to set the resource limits for that batch system.<br />  <br />  <br />  <br />  <br />  <br />  <br />  _______________________________________________<br />  <br />  users mailing list<br />  <br />  users@open-mpi.org<br />  <br />  http://www.open-mpi.org/mailman/listinfo.cgi/users<br />  <br />  <br />  <br />  <br />  <br />  
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