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#16768 PR: fix(util): reject LiveDocs backing sets with bits beyond maxDoc
14 minutes ago  0 comments  0 votes  0 watches  github-actions[bot], salvatorecampagna
# TL;DR DenseLiveDocs and SparseLiveDocs take a backing bit set that may be longer than maxDoc, ... A bit actually set past maxDoc makes deletedCount wrong and makes two of the iterators return doc ... Both builders now reject that. # Summary Both classes accept a backing set that only has to be at ...

#16734 PR: Add bulk vector path to columnar addBatch
36.9 minutes ago  10 comments  0 votes  0 watches  github-actions[bot], jimczi, mayya-sharipova
Builds on 16708, which added validation. Vector columns declared DENSE now go through a bulk path, and those checks come along with it via a ... Column API: - Add VectorValuesCursor<T>, a values cursor for DENSE columns modeled on ...
    mayya-sharipova 36.9 minutes ago:  For now, just heap-array. In the follow-up work, we can decide how to organize paged-storage: byte buffers or off-heap.
    mayya-sharipova 38.5 minutes ago:  Addressed in e5f1df0c6a7018bffc19c405c2fe2e5f323503a8

#16762: Lucene104ScalarQuantizedVectorsWriter includes deleted docs when recalculating the centroid
1 hour ago  0 comments  0 votes  0 watches  Pulkitg64, kaivalnp
Description Lucene104ScalarQuantizedVectorsWriter computes a per-field centroid before quantizing ... The centroid is the mean of the full-precision vector values gathered from the segments being ... When any source segment has deletions, the recalculation path does not skip the deleted documents.

#16767: Could/should Lucene map the same file twice for different hints (RANDOM, SEQUENTIAL) instead of ...
2.6 hours ago  0 comments  0 votes  0 watches  mikemccand
Description Spinoff from [this comment] Not sure if this is a silly idea or might be helpful: ... The hint is surprisingly impactful! I've seen benchmarks take many minutes (when it should've been a few seconds) on a fast-ish NVMe ...

#16710 PR: Add scalar quantization support for float16 vectors in the dedup KNN Codec
3.4 hours ago  34 comments  0 votes  0 watches  Pranshu-S, github-actions[bot], kaivalnp
Description Addresses one of improvements tracked in 16595 The sandbox dedup KNN codec stores ... Its scalar-quantized variant (DedupScalarQuantizedVectorsFormat) additionally stores a data-blind ... Previously, only FLOAT32 vectors were quantized — FLOAT16 (and BYTE) were stored raw only.
    Pranshu-S 13 hours ago:  Runs against different quantisation levels: ` ================================================= ...
    kaivalnp 23.9 hours ago:  Looking great, thanks @Pranshu-S! Can you add a CHANGES.txt entry + update package-info.java too? Can you also share benchmarks for higher levels of quantization with FLOAT16?

#16764 PR: Fix Lucene104ScalarQuantizedVectorsWriter to skip deleted docs when recomputing merge centroid
3.4 hours ago  0 comments  0 votes  0 watches  Pranshu-S, github-actions[bot], kaivalnp
Description <!-- If this is your first contribution to Lucene, please make sure you have reviewed the ... https://github.com/apache/lucene/blob/main/CONTRIBUTING.md --> Lucene104ScalarQuantizedVectorsWr ...

#16622 PR: Propagate getMergeInstance() through the quantized vector readers
5 hours ago  1 comments  0 votes  0 watches  github-actions[bot], jimczi, john-mlika
MergeState asks every reader for a merge instance when a merge starts, and Lucene99HnswVectorsReader ... For quantized fields the flat reader is Lucene104ScalarQuantizedVectorsReader (or, for older ... Same for finishMerge().
    jimczi 5 hours ago:  Thanks for this, and sorry it has been sitting. A few things moved under it. 16749 landed, so Lucene99FlatVectorsReader.getMergeInstance() now ... That makes this change more valuable than when you opened it: the gap no longer costs just a read ...

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