A method and device for rdma data transmission based on dynamic connection

Abstract

The embodiment of the present invention discloses a method and device for RDMA data transmission based on a dynamic connection. The sending device uses a virtual interface to establish a corresponding number of connections with the receiving device according to the number of messages to be transmitted, and transmits the messages to be transmitted through the connections. . When the sending device receives the response message, the connection that transmits the response message can be stored in the waiting queue as an idle connection; when it is necessary to send the target message to the receiving device, it can be judged according to the number of target messages and the number of idle connections Whether it is necessary to establish a connection; if so, the difference between the number of target messages and the number of idle connections is used as the number of messages to be transmitted, and a new connection is established; if not, the number of target messages is selected from the idle connection The corresponding connection transmits the target packet. It can be seen that the connection can be established dynamically according to the quantity requirement of the transmitted packets, so as to realize the multi-path transmission of data and improve the efficiency of data transmission.

Description

technical field [0001] The present invention relates to the technical field of storage systems, in particular to a method and device for RDMA data transmission based on dynamic connections. Background technique [0002] At present, the main way to increase the computing speed is to exponentially increase the number of processors and the number of processor cores. The inherent low reliability of ultra-large-scale systems affects the sustainable computing of applications, so it is necessary to study high-reliability and high-availability design technologies. [0003] InfiniBand (IB) is a "switching cable" technology that supports multiple concurrent links, each of which can run at 2.5Gbps. This architecture has a speed of 500MB / s for one link, 2GB / s for four links, and 6GB / s for 12 links. [0004] When transmitting data through IB, the data is transmitted in the form of data packets, and these data packets will be combined into pieces of information. The information may be ...

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Problems solved by technology

[0005] However, IB uses the scalability of increasing main memory. IB messages have their own incremental sequence numbers. Subsequent messages depend on the previous message. Adjacent messages need to be transmitted through the same path, resulting in The message path of the address is too unique. Even if there are redundant paths, due to the need of order preservation, redundant paths will not be used during message transmission, resulting in network congestion.

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