[OMPI users] OMPI monitor each process behavior

[Jack Bryan]

Hi , All: 
I need to monitor the memory usage of each parallel process on a linux Open MPI 
cluster. 
But, top, ps command cannot help here because they only show the head node 
information. 
I need to follow the behavior of each process on each cluster node.
I cannot use ssh to access each node. 
The program takes 8 hours to finish. 
Any help is really appreciated. 
Jack