Hi, I am trying to understand how to control the range of ports used by Open MPI. I tried setting the parameters btl_tcp_port_min_v4 and btl_tcp_port_range_v4, but they don't seem to have an effect.
I am using Open MPI 1.4.2 from Debian sid, but get the same result on RHEL5. When I run a program like mpirun --host host1,host2 -np 2 --mca btl_tcp_port_min_v4 10000 --mca btl_tcp_port_range_v4 10 sleep 100 and then in another terminal run "netstat -plnt", should I expect to see mpirun listening on one or more ports between 10000 and 10009? I don't -- mpirun is invariably listening on some other ports. Thanks! -- Best, Hsiu-Khuern.
