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Windows HPC Server 2008 introduces new Network Direct RDMA interface

Phil Pennington: Windows HPC Server 2008 introduces a new low-latency RDMA network API known as “Network Direct“.   This RDMA interface in addition to and distinct from the existing “Winsock Direct” interface.   The Network Direct interface introduces several advantages over Winsock Direct including no dependency on the Winsock stack and much lower latency metrics.  MS MPI is being developed to take advantage of this new interface. 

This means that Infiniband vendors, for instance, will need to provide HCA Network Direct providers in addition to (or perhaps instead of) the Winsock Direct providers published previously.  Consequently, development is underway by both Microsoft and partners to enable full support for the entire network stack. 

For programmers, the Network Direct API provides a model similar to the User Mode Driver Framework (UMDF).  MS MPI will be the first user-mode application to leverage Network Direct. 

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Windows HPC Server, Windows Server 2008, Microsoft, Features

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