Adrien Grand created LUCENE-9935:
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Summary: Bulk merges for stored fields when index sorting is
enabled
Key: LUCENE-9935
URL: https://issues.apache.org/jira/browse/LUCENE-9935
Project: Lucene - Core
Issue Type: Improvement
Reporter: Adrien Grand
Today stored fields disable bulk merges entirely when index sorting is enabled.
However when sorting by low-cardinality fields or when the index sort is
correlated with the order in which documents get indexed, we could likely still
have efficient bulk merges.
For instance, if you are merging two segments that are sorted on a field that
can only take 2 values, one could bulk merge the first half of the first
segment, then the first half of the second segment, then the second half of the
first segment, and finally the second half of the second segment.
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