Hello, I am using Open-mpi with Gromacs. We have an 88 node single processor pentium 4 cluster conected by ethernet and running linux. I want to acheive a short message tcp maximum length of 512kb. In lam, this would have been a configure option --with-tcp-short=524288. I am intending to use open-mpi with a runtime option --mca btl_tcp_eager_limit 524288. Is that the only thing that I need to do in order to acheive a short message max. length of 512kb?
What about: btl_tcp_min_send_size btl_tcp_max_send_size And how is this affected by: btl_tcp_min_rdma_size btl_tcp_max_rdma_size And should I set btl_openib_use_eager_rdma = 0 if I am not using InfiniBand? Many thanks. Chris Neale.
