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Posted to issues@hive.apache.org by "Murali Vemulapati (JIRA)" <ji...@apache.org> on 2017/04/24 06:50:04 UTC

[jira] [Assigned] (HIVE-15788) Implement FastBloomFilter to use RoaringBitmap instead of long[]

     [ https://issues.apache.org/jira/browse/HIVE-15788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Murali Vemulapati reassigned HIVE-15788:
----------------------------------------

    Assignee: Murali Vemulapati

> 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
>            Assignee: Murali Vemulapati
>
> 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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