A distributed control load balancing system and method based on SDN

Abstract

The invention discloses an SDN-based distributed control load balancing system and method, which mainly solve the problems of distributed expansion, network overhead, uneven load and link congestion in the existing small-scale single data center network. The system of the present invention includes a three-layer Clos underlying network and two SDN controllers. Link information, a routing table and a routing calculation module are added to the SDN controller, and the above modules act together as a data flow calculation path. The load balancing method adopts two-step path selection, divides the data flow into flow slices in the buffer of the end host, and uses two controllers to monitor and collect local link information of the two area networks respectively, and each port of the switch The queuing delay is used as the link information to optimize the routing link. The present invention adopts distributed multi-controllers and two-step path selection in a three-layer Clos network, has remarkable network balancing effect, and is used for load balancing control of a large-scale single data center network.

Description

technical field [0001] The invention belongs to the technical field of communication networks, and relates to a distributed control load balancing technology, in particular to an SDN-based distributed control load balancing system and method, which can be used in a Clos-structured data center network. Background technique [0002] In recent years, with the rapid growth of Internet services, data center network operations have become more complex. Currently, traffic management operations in a data center network are mainly divided into two strategies. One is a strategy related to user services, such as web browsing, search query, and other user services; this strategy is mainly aimed at mouse traffic, which is generated through user services, and for user-specific SLA services, mouse traffic often transmits A short duration, ie a short Flow Completion Time (FCT), is required. Another type of policy-operated traffic is generated by virtual machine migration, data backup, and...

AI Technical Summary

Problems solved by technology

For the load balancing scheme based on the SDN idea, there are mainly two schemes in the existing technology, namely, the distributed multi-controller load balancing scheme for large-scale multi-data center networks and the centralized single-controller load balancing scheme for small-scale single data center networks. The controller load balancing solution, a distributed multi-controller load balancing solution for large-scale multi-data center networks, solves the problem of uneven load among multi-data center networks, but does not solve the problem of fine-grained internal large-scale single data center networks The problem of uneven traffic

The centralized single-controller load balancing solution for small-scale single-data center networks solves the problem of uneven load within single-data center networks, but does not solve the problem of distributed expansion of large-scale single-data center networks, and cannot adapt to large-scale data center networks. application requirements, as well as the network overhead caused by large-scale network global control and the load problem of a centralized single controller

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