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Subject: [OMPI users] COMM_ACCEPT/COMM_CONNECT: what BTL will the connected processes use?
From: Katz, Jacob (jacob.katz_at_[hidden])
Date: 2009-04-21 09:28:57


Hi,

In a dynamically connected client/server-style application, where the server uses MPI_OPEN_PORT/MPI_COMM_ACCEPT and the client uses MPI_COMM_CONNECT, what will be the communication method (BTL) chosen by OMPI? Will the communication thru the resultant inter-communicator use TCP, or will OMPI choose the best possible method (e.g. sm if the client and the server are on the same node)?

Thanks.
--------------------------------
Jacob M. Katz | jacob.katz_at_[hidden]<mailto:jacob.katz_at_[hidden]> | Work: +972-4-865-5726 | iNet: (8)-465-5726

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