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Posted to common-commits@hadoop.apache.org by Apache Wiki <wi...@apache.org> on 2009/05/06 21:55:40 UTC

[Hadoop Wiki] Update of "Hbase/UsingBloomFilters" by RyanRawson

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The following page has been changed by RyanRawson:
http://wiki.apache.org/hadoop/Hbase/UsingBloomFilters

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+ == Current ==
+ 
+ Bloom filters are unavailable in 0.19.x.  They should make a re-appearance in 0.20.
+ 
+ == Historically ==
+ 
  Bloom filters can be enabled on a per-column family basis in HBase. By specifying true for the bloom filter parameter in the constructor for H!ColumnDescriptor or by calling H!ColumnDescriptor.setBloomFilter(true), a [http://portal.acm.org/citation.cfm?id=362692&dl=ACM&coll=portal bloom filter] as defined by Bloom in 1970 will be added to the column family.
  
  This can be done either at table creation time or by disabling the table and modifying the column through the H!BaseAdmin.modifyColumn API.