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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2008/10/01 01:35:44 UTC

[jira] Resolved: (HBASE-908) Add approximate counting to CountingBloomFilter

     [ https://issues.apache.org/jira/browse/HBASE-908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack resolved HBASE-908.
-------------------------

    Resolution: Fixed

Committed.  Thanks for the patch Andrzej.

> Add approximate counting to CountingBloomFilter
> -----------------------------------------------
>
>                 Key: HBASE-908
>                 URL: https://issues.apache.org/jira/browse/HBASE-908
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: util
>    Affects Versions: 0.19.0
>            Reporter: Andrzej Bialecki 
>             Fix For: 0.19.0
>
>         Attachments: bloom.patch
>
>
> CountingBloomFilter can return approximate count of how many times any particular key was added to the filter. This means that we can use a CountingBloomFilter like an approximate map of key->count, for values of count significantly smaller than the bucket size (15 in this implementation).

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