Sam An created HIVE-21787:
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             Summary: Metastore table cache enhancement
                 Key: HIVE-21787
                 URL: https://issues.apache.org/jira/browse/HIVE-21787
             Project: Hive
          Issue Type: New Feature
          Components: Standalone Metastore
            Reporter: Sam An
            Assignee: Sam An


Metastore currently uses black/white list to specify patterns of tables to load 
into the cache. Cache is loaded in one shot "prewarm", and updated by a 
background thread. This is not a very efficient design. 

In this feature, we try to enhance the cache for Tables with LRU to improve 
cache utilization.



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