SDN based distributed control load balancing system and method

Abstract

The invention discloses an SDN based distributed control load balancing system and method, aiming at mainly solving the problems of distributed extension, network overheads, uneven load and link congestion in existing small-scale single data center networks. The system disclosed by the invention comprises a three-layer Clos underlying network and two SDN controllers, wherein the SDN controller isadditionally provided with link information, a routing table and a routing calculation module, and the above modules act together to calculate a path for a data stream. The load balancing method includes the following steps: adopting two-step path selection, partitioning the data stream into stream slices in a buffer area of an end host, separately monitoring and collecting local link informationof two local area networks by using the two controllers, and taking a queuing delay of each port of a switch as the link information to optimize the selection of routing links. According to the schemeof the invention, the distributed multi-controller and two-step path selection are adopted in the three-layer Clos network, and a significant network balancing effect can be achieved; and the schemecan be used for load balancing control of large-scale single data center networks.

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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