Remote direct memory access: Difference between revisions

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{{Short description|Low-level hardware direct memory access}}

In [[computing]], '''remote direct memory access''' ('''RDMA''') is a [[direct memory access]] from the [[main memory|memory]] of one computer into that of another without involving either onecomputer's [[operating system]]. This permits high-throughput, low-[[LatencyNetwork (engineering)latency|latency]] networkingmemory access over a network, which is especially useful in massively parallel [[computer cluster]]s.

== Overview ==

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Both [[Red Hat Enterprise Linux]] and [[Red Hat Enterprise MRG]]<ref>{{cite web|url=https://investors.redhat.com/news-and-events/press-releases/2011/06-23-2011|title=Red Hat Enterprise MRG 2.0 Now Available|accessdate=23 June 2011|url-status=dead|archiveurl=https://web.archive.org/web/20160825215016/https://investors.redhat.com/news-and-events/press-releases/2011/06-23-2011|archivedate=25 August 2016}}</ref> have support for RDMA. Microsoft supports RDMA in [[Windows Server 2012]] via [[Server Message Block|SMB Direct]]. [[VMware ESXi]] also supports RDMA as of 2015.

Common RDMA implementations include the [[Virtual Interface Architecture]], [[RDMA over Converged Ethernet]] (RoCE), [[InfiniBand]], [[Omni-Path]] and, [[iWARP]] and Ultra Ethernet.

== Using RDMA ==