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From Josh Elser <josh.el...@gmail.com>
Subject Benchmark project on region location caching from HBase
Date Tue, 02 Feb 2016 18:47:56 GMT
(apparently this is my thing now -- post interesting snippets from other 
projects)

https://github.com/elliottneilclark/benchmark-hbase-cache

tl;dr hbase friends found that using a COW-Map implementation was a good 
fit for performance (over Concurrent* data structures).

A glance shows us primarily doing a RWLock with a plain-jane TreeMap. 
Would be a neat experiment to repro (perhaps after measuring how much 
time we actually spend doing tablet loc lookups)

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