apply delete-by-Term and docID immediately to newly flushed segments
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Key: LUCENE-2897
URL: https://issues.apache.org/jira/browse/LUCENE-2897
Project: Lucene - Java
Issue Type: Improvement
Reporter: Michael McCandless
Assignee: Michael McCandless
Fix For: 3.2, 4.0
Spinoff from LUCENE-2324.
When we flush deletes today, we keep them as buffered Term/Query/docIDs that
need to be deleted. But, for a newly flushed segment (ie fresh out of the
DWPT), this is silly, because during flush we visit all terms and we know their
docIDs. So it's more efficient to apply the deletes (for this one segment) at
that time.
We still must buffer deletes for all prior segments, but these deletes don't
need to map to a docIDUpto anymore; ie we just need a Set.
This issue should wait until LUCENE-1076 is in since that issue cuts over
buffered deletes to a transactional stream.
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