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我们在第二期中讲过，HASH算法是一种非常快速的查找算法，可以用于对数据进行分区和分片。但是有一个问题。根据常规哈希算法算出来的哈希值，通常是无法扩展的，也就是说，假如说，我们一开始想将数据分成四个数据片，随着我们数据量的增长，四个数据片都接近了系统的极限，现在我们想加入...

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上一期我们谈到了数据库实现快速查找的所使用的的HASH算法，能够实现O(1)复杂的快速查找，HASH算法虽然好，但是有一个致命的缺点，就是HASH函数算出的散列值，通常是随机分布，没有顺序性。而很多时候数据库的数据是有数值含义的，需要实现诸如SELECT * FROM CUSTOMER WHERE ...

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更新时间 2023-01-14 23:41:39

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