Method and device for message transmission

Abstract

The invention provides a message transmission method and a device for realizing the method. In the current practice, the routing device selects a forwarding path according to the hash value of the 5-tuple information of the forwarded message. Due to the quintuple information of packets sent by different queue pairs, the hashed values ​​may be the same or correspond to the same forwarding path, resulting in unbalanced packet traffic on each path. Aiming at the problem of unbalanced flow that may be caused by the current practice, the present invention divides the message to be sent into several groups, the messages in different groups have different source port information, and the header carried by each message carries the The write address of the message in the memory of the destination server. In this way, the packets to be sent are divided into different paths for forwarding, thereby increasing the balance of network traffic.

Description

technical field [0001] The present invention relates to the technical field of message transmission, in particular to a method and device for message transmission. Background technique [0002] In a data communication system, in order to increase the speed of message transmission between servers, a Remote Direct Memory Access (English: Remote Direct Memory Access, RDMA for short) technology is usually used for connection. RDMA is to transfer data directly to the storage area of ​​the computer through the network, and quickly move the data from one system to the remote system memory without affecting the operating system. RDMA eliminates the overhead of external memory copying and context switching, thus freeing up memory bandwidth and CPU cycles for improved application performance. [0003] Converged Ethernet-based remote direct memory access (English full name: RDMA over ConvergedEthernet, abbreviation: RoCE) is a type of RDMA technology that allows servers to perform rem...

AI Technical Summary

Problems solved by technology

However, according to the fast start feature of the RoCEv2 protocol, the packet traffic sent from a certain source port may be relatively large in a certain period of time. In addition, the randomness of the hash may also cause a certain path in a multipath network to The traffic at a certain moment is large, which may lead to the congestion of a certain path in the multi-path network

When the network is congested, it will not only increase the network delay, but also increase the possibility of network packet loss, resulting in a decrease in the effective bandwidth of network transmission.

Images