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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 .
RDMA over Converged Ethernet (RoCE) [1] is a network protocol which allows remote direct memory access (RDMA) over an Ethernet network. There are multiple RoCE versions. RoCE v1 is an Ethernet link layer protocol and hence allows communication between any two hosts in the same Ethernet broadcast domain.
NVMe-oF: an equivalent mechanism, exposing block devices as NVMe namespaces over TCP, Fibre Channel, RDMA, &c., native to most operating systems; Loop device: a similar mechanism, but uses a local file instead of a remote one; DRBD: Distributed Replicated Block Device is a distributed storage system for the Linux platform
The OpenFabrics Alliance is a non-profit organization that promotes remote direct memory access (RDMA) switched fabric technologies for server and storage connectivity. . These high-speed data-transport technologies are used in high-performance computing facilities, in research and various indus
NVM Express (NVMe) or Non-Volatile Memory Host Controller Interface Specification (NVMHCIS) is an open, logical-device interface specification for accessing a computer's non-volatile storage media usually attached via the PCI Express bus.
The SCSI RDMA Protocol (SRP) fabric module allows the transport of SCSI traffic across RDMA (see above) networks. As of 2013, SRP was more widely used than iSER, although it is more limited, as SCSI is only a peer-to-peer protocol, whereas iSCSI is fully routable.
An RDMA consortium was announced on May 31, 2002, with a goal of product implementations by 2003. [1] The consortium released their proposal in July, 2003. [ 2 ] The protocol specifications were published as drafts in September 2004 in the Internet Engineering Task Force and issued as RFCs in October 2007.
Starting with EF600 systems are end-to-end NVMe and capable of NVMe/FC in addition to NVMe/RoCE and NVMe/InfiniBand. Sync and async mirroring are supported with SANtricity 11.50. SANtricity Unified Manager is a web-based manager that supports up to 500 EF/E-Series arrays and supports LDAP, RBAC, CA and SSL for authorization and authentication.