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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-15788) Implement FastBloomFilter to use RoaringBitmap instead of long[]
Date Thu, 02 Feb 2017 01:55:51 GMT
Gopal V created HIVE-15788:
------------------------------

             Summary: Implement FastBloomFilter to use RoaringBitmap instead of long[] 
                 Key: HIVE-15788
                 URL: https://issues.apache.org/jira/browse/HIVE-15788
             Project: Hive
          Issue Type: Improvement
          Components: UDF
            Reporter: Gopal V


Currently, a bloom filter which is all 1s occupies the exact amount of space as a bloom filter
which is sparse.

This is an entire waste of space and produces memory pressure and generate a massive number
of cache misses.



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