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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-10155) LLAP: switch to sensible cache policy
Date Tue, 31 Mar 2015 01:47:54 GMT
Sergey Shelukhin created HIVE-10155:
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             Summary: LLAP: switch to sensible cache policy
                 Key: HIVE-10155
                 URL: https://issues.apache.org/jira/browse/HIVE-10155
             Project: Hive
          Issue Type: Sub-task
            Reporter: Sergey Shelukhin
            Assignee: Sergey Shelukhin


FIFO policy is currently the default. We can test LRFU one but there were concerns that it
won't scale. One option is to implement a two-tier policy, FIFO/LRU for blocks referenced
once, and something more complex (LFU, LRFU) for blocks referenced more than once. That should
be friendly to large scans of a fact table in terms of behavior and overhead.




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