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iWARP is a state of the art high-speed connection-based RDMA networking technology for Ethernet networks to provide InfiniBand-like zero-copy and one-sided communication capabilities over Ethernet. Despite the benefits offered by iWARP, many datacenter and web-based applications, such as stock-market trading and media-streaming applications, that rely on datagram-based semantics (mostly through UDP/IP) cannot take advantage of it because the iWARP standard is only defined over reliable, connection-oriented transports. This paper presents an RDMA model that functions over reliable and unreliable data-grams. The ability to use data-grams significantly expands the application space serviced by iWARP and can bring the scalability advantages of a connectionless transport to iWARP.
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