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集群模式主要解决水平拓展问题和整体的高可用(局部节点故障不影响其他节点的数据)。如果要保证所有数据的高可用还需要配合主从模式Cologne's consumers are noted for their liberalism and joie de vivre; it’s easy to possess a fantastic time with them during the beer halls of the Altstadt or dur