Michael McCandless created LUCENE-7561:
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Summary: Add back-compat indices for index sorting
Key: LUCENE-7561
URL: https://issues.apache.org/jira/browse/LUCENE-7561
Project: Lucene - Core
Issue Type: Improvement
Reporter: Michael McCandless
Assignee: Michael McCandless
Index time sorting is a powerful feature making searches that are "congruent"
with the sort much faster, in exchange for slower indexing. For some use cases
this is a great tradeoff.
We recently promoted the feature to core (LUCENE-6766) and made it very simple
to use (you just call {{IndexWriterConfig.setIndexSort}}. In LUCENE-7537 we
are adding support for multi-valued fields.
I think it's important we properly test backwards compatibility and from a
quick look it looks like we have no sorted indices in
{{TestBackwardsCompatibility}} ...
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