Hi All, I am having some issues with setting the btl parameter. I have both openmpi 2.1.1 and 1.6.5 installed on the system. The 2.1.1 version was installed by Rocks. I am using SGE to schedule jobs.
I have been setting the btl parameter in the execution command which is working fine. But I would like to make the setting default. I tried to do this by editing the openmpi-mca-params.conf file to include: btl = openib,self,sm I did this for the config file of both openmpi versions. I found that this did not set the parameter when I run an mpi job. In order to try and diagnose the issue, I wanted to check if the configuration file was working correctly. I found that the environment variable OMPI_MCA_mca_ param_files contained nothing. I also found that running the command: ompi_info --param mca mca_param_files returns nothing. To me this implies that openmpi isn't looking for the configuration file. I have also tried setting the environment variable manually with a script in profile.d, but it seems that the change is being overwritten later in the login process. Im guessing openmpi sets environment variables to default at some point as it sets up? I am fairly new to this so if anyone has any suggestions of things I can do to further diagnose then that would be great. Thanks, Sam
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