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一致性哈希：https://zh.wikipedia.org/wiki/%E4%B8%80%E8%87%B4%E5%93%88%E5%B8%8C

图解一致性哈希：https://segmentfault.com/a/1190000021199728#:~:text=%E4%B8%80%E8%87%B4%E6%80%A7%E5%93%88%E5%B8%8C%E7%AE%97%E6%B3%95%E5%9C%A81997%20%E5%B9%B4%E7%94%B1%E9%BA%BB,%E7%9A%84%E5%8A%A8%E6%80%81%E4%BC%B8%E7%BC%A9%E7%AD%89%E9%97%AE%E9%A2%98%E3%80%82