Adrien Grand created SOLR-3830:
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             Summary: Rename LFUCache to FastLFUCache
                 Key: SOLR-3830
                 URL: https://issues.apache.org/jira/browse/SOLR-3830
             Project: Solr
          Issue Type: Bug
    Affects Versions: 4.0-BETA
            Reporter: Adrien Grand
            Priority: Minor


I find it a little disturbing that LFUCache shares most of its behavior (not 
strictly bounded size, good at concurrent reads, slow at writes unless eviction 
is performed in a separate thread) with FastLRUCache while it sounds like it is 
the LFU equivalent of LRUCache (strictly bounded size, synchronized reads, fast 
writes) so I'd like to rename it to FastLFUCache.

Maybe we should also rename these Fast*Cache to Concurrent*Cache so that people 
don't think that they are better than their non Fast alternatives in every way.

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