Robert Muir created LUCENE-5122:
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Summary: DiskDV probably shouldnt use BlockPackedReader for
SortedDV doc-to-ord
Key: LUCENE-5122
URL: https://issues.apache.org/jira/browse/LUCENE-5122
Project: Lucene - Core
Issue Type: Improvement
Reporter: Robert Muir
I dont think "blocking" provides any benefit here in general. we can assume the
ordinals are essentially random and since SortedDV is single-valued, its
probably better to just use the simpler packedints directly?
I guess the only case where it would help is if you sorted your segments by
that DV field. But that seems kinda wierd/esoteric to sort your index by a
deref'ed string value, e.g. I don't think its even supported by SortingMP.
For the SortedSet "ord stream", this can exceed 2B values so for now I think it
should stay as blockpackedreader. but it could use a large blocksize...
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