Adrien Grand created LUCENE-8321:
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Summary: Allow composite readers to have more than 2B documents
Key: LUCENE-8321
URL: https://issues.apache.org/jira/browse/LUCENE-8321
Project: Lucene - Core
Issue Type: Improvement
Reporter: Adrien Grand
I would like to start discussing removing the limit of ~2B documents that we
have for indices, while still enforcing it at the segment level for practical
reasons.
Postings, stored fields, and all other codec APIs would keep working on
integers to represent doc ids. Only top-level doc ids and numbers of documents
would need to move to a long. I say "only" because we now mostly consume
indices per-segment, but there is still a number of places where we identify
documents by their top-level doc ID like {{IndexReader#document}}, top-docs
collectors, etc.
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