Varun Thacker created LUCENE-5688:
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Summary: NumericDocValues fields with sparse data can be
compressed better
Key: LUCENE-5688
URL: https://issues.apache.org/jira/browse/LUCENE-5688
Project: Lucene - Core
Issue Type: Improvement
Reporter: Varun Thacker
Priority: Minor
I ran into this problem where I had a dynamic field in Solr and indexed data
into lots of fields. For each field only a few documents had actual values and
the remaining documents the default value ( 0 ) got indexed. Now when I merge
segments, the index size jumps up.
For example I have 10 segments - Each with 1 DV field. When I merge segments
into 1 that segment will contain all 10 DV fields with lots if 0s.
This was the motivation behind trying to come up with a compression for a use
case like this.
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