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Common RDMA implementations include the [[Virtual Interface Architecture]], [[RDMA over Converged Ethernet]] (RoCE), [[InfiniBand]], [[Omni-Path]] and [[iWARP]].
== Using RDMA ==
Applications access control structures using well-defined APIs originally designed for the InfiniBand Protocol (although the APIs can be used for any of the underlying RDMA implementations). Using send and completion queues, applications perform RDMA operations by submitting work queue entries (WQEs) into the submission queue (SQ) and getting notified of responses from the from the completion queue (CQ). <ref>Storm: a fast transactional dataplane for remote data structures: https://dl.acm.org/doi/abs/10.1145/3319647.3325827</ref>
== Transport Types ==
RDMA can transport data reliably or unreliably over the Reliably Connected (RC) and Unreliable Datagram (UD) transport protocols, respectively. The former has the benefit of preserving requests (no requests are lost), while the latter requires fewer queue pairs when handling multiple connections. This is due to the fact that UD is connection-less, allowing a single host to communicate with any other using a single queue <ref>Storm: a fast transactional dataplane for remote data structures: https://dl.acm.org/doi/pdf/10.1145/3319647.3325827</ref>.
== References ==
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