Robert Muir created LUCENE-4969:
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Summary: add sort comparator that uses OrdinalMap
Key: LUCENE-4969
URL: https://issues.apache.org/jira/browse/LUCENE-4969
Project: Lucene - Core
Issue Type: New Feature
Reporter: Robert Muir
OrdinalMap (LUCENE-4795, SOLR-4490) lets you trade off reopen time for faster
faceting: it maps per-segment ordinals to a "global" space based on deviation
from expected deltas.
We could add a sort comparator to the sandbox or similar that uses this,
especially in the case you are using this for faceting anyway: you can then
safely offload all terms bytes to disk (DiskDV) and still have performant
sorting and faceting.
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