本文研究了广域网分布式集群的设计。与LVS 相比，这种集群的结构虽然复杂，但是能够克服传统集群的局限性，提供质量好，容量大，性价比高的解决方案。根据一种称之为CG 树的分布式集群的抽象模型，作者设计了自己CG 树算法。这种方案能有效的减少网络节点之间的通信开销，并能在集群系统出现故障时自动进行调整，保证了高可用性。模拟实验结果表明，该系统具有很好的性能。关键字：分布式 集群 CG 树 LVSAbstract：The paper studies the designs of wide-area distributed cluster. Although these kinds of cluster have more complex structure, they can overcome limitations of traditional cluster and provide resolutions with good quality, large capacity and high performance compared to LVS. Base on a model of distributed cluster, named CG tree, the author design his algorithms to manipulate CG trees. The scheme can efficiently reduce the cost of intercommunication between different networks, and can automatically adjust tree to ensure high availability when cluster faults occur. The result of simulated experiments indicates that the system has quite good performance.Key words：Distributed cluster CG tree LVS
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