Mark Harwood created LUCENE-4069:
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Summary: Segment-level Bloom filters for a 2 x speed up on rare
term searches
Key: LUCENE-4069
URL: https://issues.apache.org/jira/browse/LUCENE-4069
Project: Lucene - Java
Issue Type: Improvement
Components: core/index
Affects Versions: 3.6
Reporter: Mark Harwood
Priority: Minor
Fix For: 3.6.1
An addition to each segment which stores a Bloom filter for selected fields in
order to give fast-fail to term searches, helping avoid wasted disk access.
Best suited for low-frequency fields e.g. primary keys on big indexes with many
segments but also speeds up general searching in my tests.
Overview slideshow here:
http://www.slideshare.net/MarkHarwood/lucene-bloomfilteredsegments
Benchmarks based on Wikipedia content here: http://goo.gl/X7QqU
Patch based on 3.6 codebase attached.
There are no API changes currently - to play just add a field with "_blm" on
the end of the name to invoke special indexing/querying capability. Clearly a
new Field or schema declaration(!) would need adding to APIs to configure the
service properly.
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