Thank you for your quick response.
I have another query, whether OpenMPI depends on Subnet manager/Subnet administration components of OFED ? (I mean, does OpenMPI require any services from Subnet manager/Subnet administration components in OFED without which it cannot run?)
Thanks & Regards,
On Jun 1, 2011, at 8:49 AM, Bhargava Ramu Kavati wrote:You're asking two different questions.
> I am trying to run MPI applications using OpenMPI in OFED Cluster (over IB). I am trying to find whether OpenMPI supports a transport interface which is based on libibverbs layer in OFED (I mean, which does not use connection manager in OFED) ?
1. Does Open MPI use the native verbs interface in OFED?
2. Does Open MPI use one of the OFED connection managers?
For IB, Open MPI can use the RDMA connection manager, but it does not have to. It defaults to not using it (instead, it exchanges IB/verbs connection data via TCP sockets).
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