基于动态反馈机制的服务器负载均衡算法研究

Server Load Balancing Algorithm Based on Dynamic Feedback

针对当前已有负载均衡算法无法准确反映服务器负载的大小和手动设置服务器权值比较固定等方面所存在的不足,提出了一种基于动态反馈机制的服务器负载均衡算法。本算法综合考虑服务器各种性能因素,并根据当前负载动态调整权值,再依据算法调整服务器负载,使得服务器实现负载均衡。通过使用OPNET仿真软件证明该算法相对于传统算法能够减少服务器延迟,提高平均响应速率,并且有效地平衡了集群中服务器的负载。

Aiming at some existing disadvantages of load balance algorithm that the load balance algorithm can not reflect the situation of servers＇ load correctly and that the manual weight setting is inflexible, this paper puts for- ward an improved and new load balancing algorithm named adaptive weighted least-load algorithm. Server perform- ance factors are considered, and the weight is dynamically adjusted according to the load of each server to make sure that the load of the server cluster is balanced. Simulation by OPNET indicates that the new algorithm can reduce the service delay, improve the average response rate and balance servers＇ load effectively compared with existing load balance algorithm.