area/load balancingdesign proposalenhancementhelp wanted
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説明
HRW Hash Load Balancing
(Highest Random Weight, HRW) hashing, an alternative to the ring based, consistent hashing, allows clients to achieve distributed agreement on which node (or proxy) a given key is to be placed in.
this hash has two advantages
1、Load balancing: Since the hash function is randomizing, each of the n nodes is equally likely to receive the key K. Loads are uniform across the sites.
2、High hit rate: Since all clients agree on placing an key K into the same node N , each fetch or placement of K into N yields the maximum utility in terms of hit rate. The key K will always be found unless it is evicted by some replacement algorithm at N.
how about adding HRW hash to envoy ?