有TCP连接容错功能的网络负载平衡调度系统

针对现有集群网络服务器负载平衡调度方案的不足，提出具有TCP连接容错功能的网络负载平衡调度系统。该系统基于Linux Virtual Server，使用两个前端调度设备并行调度。两个调度设备使用同构网卡为客户提供单一系统映像；通过内核中对请求包的过滤实现分流；通过相互容错屏蔽调度设备故障。

A system for network load balancing dispatch with the ability of TCP connection fault tolerance

A new cluster dispatch system with the ability of TCP connection fault tolerance was discussed based on Linux Virtual Server. Using two dispatchers to work parallel, the system overcomes the shortcomings of existing solutions. These two dispatchers provide clients a single system image (SSI) through duplicated network adapters. Load sharing between two dispatchers is achieved through a packet filter in each dispatcher's kernel. Two dispatchers also mask fault reciprocally to provide high availability. By applying integrate architecture, the system has small volume and low cost. The front dispatcher's bottleneck is alleviated and the single failure point of the cluster server eliminated in this system.