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From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HBASE-1200) Add bloomfilters to hfile; use dynamicbloomfilter instead of base bloomfilter; depend on hadoop 0.20
Date Thu, 05 Mar 2009 09:27:56 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ryan rawson reassigned HBASE-1200:
----------------------------------

    Assignee: ryan rawson  (was: stack)

> Add bloomfilters to hfile; use dynamicbloomfilter instead of base bloomfilter; depend
on hadoop 0.20
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1200
>                 URL: https://issues.apache.org/jira/browse/HBASE-1200
>             Project: Hadoop HBase
>          Issue Type: Task
>            Reporter: stack
>            Assignee: ryan rawson
>             Fix For: 0.20.0
>
>
> Add bloomfiltering to hfile.  Should it be optional or on always?  Currently, we bloom
filter rows only, not the column + ts component, which seems good place to start but we size
the bloomfilter with the number of entries we are about to flush which seems like usually
we'd be making a filter too big.  How to figure how many rows in the flush?   We should use
the DynamicBloomFilter as Andrezj does up in hadoop BloomFilterMapFile.  Start small and let
it resize as entries are added.

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