Comments (4)
比如:
当在计算后台节点的hash()时,考虑到虚节点在内,如果不同节点经计算得到一个相同的hash值,那么在一致性hash环上,就存在两个不同物理节点公用一个hash_index.当对key计算一致性hash 值时,正好落在这个hash_index.那到底取这两个物理节点的哪一个呢?
from consistent_hash.
from consistent_hash.
那就是如果node 在hash-ring 上处在冲突时,只有第一个节点才是被映射到ring上。这样对算法的准确性 有一定影响,如果虚节点比较多,hash比较均匀化,损失一个虚节点没不会 导致热点数据。后面想想也没有特别大影响。谢谢解答。
------ 题外话,哥哥这几年没在用c++呢,不知道最近往哪方面发展了,求分享。
from consistent_hash.
from consistent_hash.
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from consistent_hash.