High performance load balancing system and method based on software defined network

Abstract

The invention discloses a high-performance load balancing system based on a software-defined network, which mainly solves the problems of uneven load and link congestion in the core layer of the existing data center network. It includes a Fat-Tree underlying network and an SDN controller. The Fat-Tree underlying network is deployed with a traffic sampling detection module, a DCTCP flow control module, and an FEC-based encoding transmission module, which respectively complete real-time perception of traffic and distinguish between mouse and elephant flows. The link delay adjusts the port flow rate and adds redundant packets to reduce the mouse flow delay. The SDN controller is additionally equipped with a topology information module and an image flow scheduling module, which are used to complete storage of the topology information of the underlying network and schedule the image flow to a path with the minimum path cost. The invention reduces the retransmission delay caused by packet loss, solves the problem of head-to-tail blockage of rat flow, improves throughput of elephant flow, and can be used in Fat-Tree data center network topology.

Description

technical field

[0001] The invention belongs to the technical field of communication networks, and in particular relates to a high-performance load balancing system and method, which can be used in the network topology of a Fat-Tree data center to distinguish mouse flow and elephant flow in real time and realize flow load balancing. Background technique

[0002] With the rapid growth of Internet online business users and public access bandwidth, the data center network traffic presents a trend of rapid growth. Internet services have put forward higher and higher transmission quality requirements for data centers, including large bandwidth, low latency, security guarantees, and flexible scheduling. Under this trend, various solutions have emerged. The software-defined network SDN technology represented by the OpenFlow protocol is a new type of network switching model that has completely subverted the original control and data forwarding. The method of using the same plane an...

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