RDMA Read Based Rendezvous Protocol for MPI over InfiniBand: Design Alternatives and Benefits

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Provided by: The Ohio Society of CPAs
Topic: Big Data
Format: PDF
Message Passing Interface (MPI) is a popular parallel programming model for scientific applications. Most high-performance MPI implementations use Rendezvous Protocol for efficient transfer of large messages. This protocol can be designed using either RDMA Write or RDMA Read. Usually, this protocol is implemented using RDMA Write. The RDMA write based protocol requires a twoway handshake between the sending and receiving processes. On the other hand, to achieve low latency, MPI implementations often provide a polling based progress engine.
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