Centralized end-network coordinated tcp congestion control method in data center network

Abstract

The invention discloses a TCP congestion control method for centralized end-network coordination in a data center network. Mark the congestion level of the port; extract the source-destination IP, source-destination TCP port, and Packet byte size of each data packet newly enqueued by the port in the congested state, and use the extracted information and the congestion level of the port to generate a congestion message; control The device receives the congestion message uploaded by the switch, and selects the scheduling flow and speed reduction factor that the port needs to slow down according to the congestion level of the port corresponding to the congestion message; uses the scheduling flow and speed reduction factor of each congested port to generate an adjustment message, and The adjustment message is sent to the host end corresponding to the scheduling flow through TCP Socket communication; the host end adjusts the sending rate of the scheduling flow according to the scheduling flow and the deceleration factor in the adjustment message.

Description

Technical field [0001] The present invention relates to a method for adjusting the time of network congestion, particularly relates to TCP congestion control method in a network to a data center in a centralized peer network coordination. Background technique [0002] With the rapid development of Internet applications and a substantial increase in cloud computing business, led to a sharp growth in the data center network traffic, traffic growth has led to tension network bandwidth resources, once the link can not meet the high-speed data stream, the network will congestion, queue accumulation occurs, packet loss, delay increases and so on, seriously affecting network performance and user experience. To alleviate congestion data center, the network traffic as much as possible to meet the requirements of different features of the proposed congestion control mechanisms in the network data center has become a hot topic. [0003] For congestion control mechanisms in the data center n...

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Problems solved by technology

[0003] Aiming at the congestion control mechanism under the data center network, the distributed congestion control mechanism specially designed for the data center network is commonly used at present. The congestion control algorithm of TCP is improved through active queue management and the advantages of centralized control of SDN technology are utilized. The controller centrally makes decisions on congestion according to the reported network status information and adjusts the congestion under the network. Although these two methods can reduce the congestion level of the data center network to a certain extent, the first mechanism is easy to cause concurrency and bursts. Synchronization of conflicts and frequent changes of routes, while the second type needs to maintain and detect information such as the real-time survival time and flow size of all flows. On the switch side, it is also necessary to update the TCP notification window value, which makes the overhead of switch parsing and caching bigger

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