Comments (1)
虚拟一个圆环,把每个机器配置到圆环上。如果存入一个key,则求出key的hash值映射到圆环上。然后把这个key存入顺时针最近的那个机器上。这样即使有一台机器挂掉也只会影响它和上一个机器之前的对象,如果加入一个新的机器也只会影响它和上一个机器之间的对象。而且在进行机器配置的时候一般会虚拟多个节点,这样如果增加配置也直接替换某个虚拟节点就可以。
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