Method and device for remote direct memory access

Abstract

The invention discloses a method and device for remote direct memory access. The method is applied to first electronic equipment, and a remote direct memory access RDMA connection is established between the first electronic equipment and second electronic equipment; the method comprises the following steps: after receiving a first RDMA write request message transmitted by the second electronic equipment by the first electronic equipment through the RDMA connection, acquiring a first address from an RDMA protocol head of the first RDMA write request message; and comparing the first address with a pre-stored mark address, if the first address is the same as the mark address, then acquiring a second address from a protocol extension header of the first RDMA write request message, and using the second address to write the processed first RDMA write request message to a storage region corresponding to the second address in the second electronic equipment. The method and device for the remote direct memory access provided by the invention solve the problems in the prior art that partial invalid interaction is caused by using the standard RDMA, and delay of transmission bandwidth resources and data interaction is wasted

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and device for remote direct memory access. Background technique [0002] Remote direct memory access (RDMA) is generally used for data transmission between hosts in a network. During the data transmission process, the host CPUs at the data source and data destination do not need to participate in data movement and replication, thereby reducing the burden on the CPU and reducing the delay of data exchange between hosts on the network. Depending on the protocol carried by the underlying layer, the RDMA technology can be implemented based on the TCP protocol and lossless converged Ethernet. The three implementations are the same at the transport layer and above. [0003] In the RDMA protocol, such as figure 1 As shown, a queue pair (QP) needs to be established between any two applications that need to interact with each other. [0004] The established queue pair in...

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Problems solved by technology

[0014] The present invention provides a method and device for remote direct memory access. The method and device provided by the present invention solve the problem of partially invalid interactions caused by the use of standard RDMA in the prior art, wasting transmission bandwidth resources and delays in data interaction question

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