What is RDMA over InfiniBand?

RDMA over Converged Ethernet (RoCE) is a network protocol that allows remote direct memory access (RDMA) over an Ethernet network. Although the RoCE protocol benefits from the characteristics of a converged Ethernet network, the protocol can also be used on a traditional or non-converged Ethernet network.

What is Microsoft RDMA?

Remote DMA (RDMA) is an incredible technology that allows networked hosts to exchange information with virtually no CPU overhead and with extremely little latency in the end-system.

Who invented RDMA?

RDMA [1]: A short history of remote DMA networking. Cool factoid: RDMA was co-invented by Amazon’s current CTO, Werner Vogels!

Who owns InfiniBand?

Intel
Intel announced today it is to acquire the InfiniBand business from networking company QLogic for $125 million in cash, as the chip-making giant seeks to strengthen its high-performance computing portfolio. InfiniBand is a fabric technology that can be used to connect servers in high-performance computing environments.

Does InfiniBand use RDMA?

InfiniBand is just a specific network architecture offering RDMA. It’s simply an RDMA implementation over (lossless data center) Ethernet which is somewhat competing with InfiniBand as a wire-protocol while using the same verbs interface as API.

Where is RDMA used?

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.

Why do we need RDMA?

Remote Direct Memory Access(RDMA) helps in boosting the performance of applications that need low latency and high throughput as it supports kernel bypass, zero-copy and does not involve CPU. Remote Direct Memory Access(RDMA) is direct access of memory from memory of one machine to the memory of another machine.

Is InfiniBand dead?

Years later, this niche market is still alive and kicking. According to IDC, in 2019, the market for InfiniBand was a little over $200 million. While this is just a fraction of the overall Ethernet switch market, it’s certainly not dead.

Is InfiniBand a Rdma?

InfiniBand is just a specific network architecture offering RDMA.

Why is InfiniBand faster than Ethernet?

Key difference between Ethernet and Infiniband, which makes Infiniband faster, is RDMA (Remote Direct Memory Access). DMA (in networking) is an operation which access the memory directly from the NIC (Network Interface Controller), without involving the CPU.

How is InfiniBand used?

It is used for data interconnect both among and within computers. InfiniBand is also used as either a direct or switched interconnect between servers and storage systems, as well as an interconnect between storage systems. It is designed to be scalable and uses a switched fabric network topology.

What is NFS over RDMA?

Starting in the Solaris 10 release, the default transport for NFS is the Remote Direct Memory Access (RDMA) protocol, which is a technology for memory-to-memory transfer of data over high-speed networks. Specifically, RDMA provides remote data transfer directly to and from memory without CPU intervention.

How is InfiniBand used in high performance computing?

InfiniBand (abbreviated IB) is a computer-networking communications standard used in high-performance computing that features very high throughput and very low latency.

What kind of hardware is needed for RDMA?

Use of RDMA usually requires specialized networking hardware that implements InfiniBand, Omni-Path, RoCE or iWARP protocols. Soft-RoCE provides RDMA features over a standard Ethernet NIC. Upper-layer protocols (ULP) in the kernel implement RDMA-accelerated services such as IP (e.g. IPoIB) and storage (e.g. iSER, SRP).

Why is RDMA used in converged networking infrastructure?

As of 2018 RDMA had achieved broader acceptance as a result of implementation enhancements that enable good performance over ordinary networking infrastructure . For example RDMA over Converged Ethernet (RoCE) now is able to run over either lossy or lossless infrastructure.

Who are the members of the InfiniBand Trade Association?

InfiniBand originated in 1999 from the merger of two competing designs: Future I/O and Next Generation I/O. This led to the formation of the InfiniBand Trade Association (IBTA), which included Compaq, Dell, Hewlett-Packard, IBM, Intel, Microsoft, and Sun.