ACRC: Accurate Credit Rate Control

In data centers, data packet loss will cause high retransmission delays, which is very harmful to some real-time network loads. For this reason, many production data centers have deployed lossless networks. ExpressPass as an advanced forward-looking congestion control protocol, it can achieve losslessness through the credit appointment mechanism, while making full use of network resources. However, due to the instability of the data stream of the transport layer, its rate adjustment mechanism based on credit serial numbers cannot guarantee the real-time nature of credit serial numbers. At the same time, a large amount of credit package storage will occupy the buffer memory, resulting in a decrease in server performance. This paper presents an approach called accurate credit rate control (ACRC), which proposes a new rate adjustment algorithm based on ECN marking based on ExpressPass, which solves the real-time problem of ExpressPass's serial number-based rate adjustment algorithm and save the data bit space consumed by symbolizing the package. It solves the real-time and ends congestion problems of ExpressPass very well.