![]() ![]() InfiniBand is currently the most popular technology that implements RDMA. On the other hand, another approach for high performance networking is based on RDMA (Remote Direct Memory Access) which offers innovative features such as kernel bypass, zero copy, offload of splitting and assembly of messages in packets to the CAs (Channel Adapters), etc. On one hand, Ethernet has evolved significantly and today it is common to find 10 Gigabit Ethernet networks in LANs. ![]() ![]() The growth of Internet has led to the development of high performance networks. It was defined almost twenty years ago by the IETF as a replacement of IPv4, and little by little, it is becoming more preponderant as the Internet protocol. IPv6 is the response to the shortage of IPv4 addresses. ![]() However, the differences get important as the payload size increases. Also, it is noticeable that IPoIB in datagram mode and in connected mode have similar performance for small UDP and TCP payload. Our results show significant differences between RDMA and IPoIB communications, encouraging the coding of new applications with InfiniBand verbs. For RDMA communications, we consider three transport services: (1) Reliable Connection, (2) Unreliable Connection, and (3) Unreliable Datagram. We also evaluate the performance of InfiniBand using different transport protocols with several benchmarking tools in a testbed. In this paper, we make an introduction to InfiniBand and IP over InfiniBand (IPoIB), where the latter is a protocol proposed by the IETF to run traditional socket-oriented applications on top of InfiniBand networks. It uses the Remote Direct Memory Access (RDMA) where communication tasks that are typically assigned to CPUs are offloaded to the Channel Adapters (CAs), resulting in a significant increase of the throughput and reduction of the latency and CPU load. InfiniBand is widely accepted as a high performance networking technology for datacenters and HPC clusters. ![]()
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