Hi, I am invoking my Java MPI program as,
mpirun opts script.sh Now, I want to pass some rank specific argument to this script. For example, I need to enable GC logs for one of the processes only, so I need to pass an argument to the JVM if that's rank0 to do GC logs. I've asked the same question a while back and Ralph suggested to use mpirun opts -np 1 java args-for-rank0 app : -np 1 java args-for-others .. style. It works for 1 node, but beyond that, there's something that goes wrong with how processes are assigned to communicators. In the code, the comm world is split into different communicators and this pattern breaks that logic. Is there an alternative approach to doing this? Thank you, Saliya -- Saliya Ekanayake Ph.D. Candidate | Research Assistant School of Informatics and Computing | Digital Science Center Indiana University, Bloomington
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