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RDMA (Remote Direct Memory Access) is a direct memory access from the memory of one computer into that of another without involving either one's operating system.RoCE: a network protocol that allows RDMA over an Ethernet network by encapsulating an IB (InfiniBand) transport packet over Ethernet. Remote direct memory access. In computing, remote direct memory access ( RDMA) is a direct memory access from the memory of one computer into that of another without involving either one's operating system. This permits high-throughput, low- latency networking, which is especially useful in massively parallel computer clusters. In this article, some network cards of the three brands will be compared and analyzed in two main aspects: performance (port configuration, data rate per port, speed and slot width, controller, etc.) & functionality (on-chip QoS and traffic management, iSCSI, NFS, FCoE, RoCE, operating system, etc.), all of which will be presented in each table.3.

In addition, our support of 100G Ethernet gives customers a guaranteed roadmap to higher performance as it is required.By selecting FastLinQ NICs, customers also avoid vendor lock-in, as these NICs interoperate with those from all other vendors offering RoCE or iWARP. If, over the longer term, the RoCE or iWARP camp gains greater market adoption, the customer is protected from NIC obsolescence. By delivering a protocol-agnostic design, Marvell FastLinQ technology delivers the following benefits:FastLinQ Universal RDMA enabled NICs offer customers a future-proof path to implementing RDMA. Marvell FastLinQ Series 10/25/40/50/100GbE adapters support Universal RDMA (RoCE, RoCEv2 and iWARP) and deliver the ultimate choice to customers.With its FastLinQ ® 41000/45000 NICs, Marvell has taken the unique approach of handling both RoCE and iWARP.