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#16030 PR: Implement data-blind scalar quantization
10.2 minutes ago  5 comments  0 votes  0 watches  github-actions[bot], kaivalnp, mccullocht, mikemccand, romseygeek
Add an option to the quantization format to enable or disable centering (enabled by default). When centering is disabled we also stop writing the float vectors which can lead to significant ... Special handling is included during merges -- we check that all of the input is in the same ...
    mccullocht 10.2 minutes ago:  I'll try to revive this over the next week or two. > This should work well when incoming vectors are isotropic (all dimensions behave the same i.e ...
    mikemccand 1.4 hours ago:  +1, I love that we are making progress on data-blind quantization. This should work well when incoming vectors are isotropic (all dimensions behave the same i.e. the ... But I think your average trained model won't just produce isotropic embeddings?

#16091 PR: Replace deprecated search(Query, Collector) with CollectorManager in JoinUtil
1.6 hours ago  14 comments  0 votes  0 watches  github-actions[bot], jainankitk, javanna
For the ScoreMode.None + no min/max path, replace the deprecated IndexSearchersearch(Query, ... All per-slice collectors share a single AtomicLongArray sized to the global value count, so memory ... Each slice remaps segment ordinals to global ordinals during collection and atomically ORs the ...
    javanna 1.6 hours ago:  Heads up: I reworked the approach to be less memory costly, at the cost of using atomic data ... That adds some overhead for the sequential case where an executor is not provided to the index ... I find that that is an ok compromise though, because we want search concurrency to be a first class ...
    javanna 2.5 hours ago:  I pushed a different version that is much closer to what the original collector did, and added a ... The memory concerns should addressed by that. I am going to resolve this thread and will request another review round.

#16298: Store IndexedDISI in a separate file from doc values data
2.3 hours ago  1 comments  0 votes  0 watches  romseygeek, sgup432
Description Currently, for sparse fields (where not all documents have a value), we write two ... IndexedDISI is a compressed list of docIds which helps in answering question like 'Does document X ... We already separated out skip index into a different file - https://github.com/apache/lucene/pull/ ...
    romseygeek 2.3 hours ago:  > We can either separate out this into a new file or stuff it inside skip index. I prefer the former as it is much clean.

#16510 PR: Implement intoBitSet for NotDocIdSet and IndexSortSortedNumericDocValuesRangeQuery
5.9 hours ago  0 comments  0 votes  0 watches  github-actions[bot], kkewwei
Description This PR adds intoBitSet implementations for these two cases, which can avoid ... I’m not sure whether benchmarks are required for these paths. I’d be happy to add them if need

#16092 PR: Add hadamard rotation to vector fields
11.6 hours ago  81 comments  0 votes  0 watches  benwtrent, github-actions[bot], kaivalnp, mccullocht, mikemccand, shubhamvishu, xande
Description I worked with CC(Claude Code; did a great job in all phases from initial impl to ... This address the 2nd item Implement random rotation of vectors and queries. from Data-blind scalar ... I'm opening this to gather community feedback, as it shows promising recall improvements.
    mikemccand 16.1 days ago:  Note: luceneutil PR is merged, so benchmarks can precondition vectors (a way to pre-test before ... @shubhamvishu is there a separate issue open to switch to data-blind quantization? I.e. we don't need to scan the incoming vectors to compute their distributions.
    github-actions[bot] 1.6 months ago:  This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the dev@lucene.apache.org list. Thank you for your contribution!

#16089 PR: Upgrade DocIdSetBuilder to use FixedBitSet eagerly once exceeding the threshold
13.7 hours ago  12 comments  0 votes  0 watches  epotyom, github-actions[bot], kkewwei
Description In DocIdSetBuilder, if We know the cost and is large enough, switch the builder to ... . <!
    epotyom 2.2 days ago:  Thanks for adding and running the tests @kkewwei - great results!
    kkewwei 2.4 days ago:  @epotyom Thanks for the detailed explanation. I added a SubHalfIntNRQ benchmark task set in luceneutil(I'd be happy to submit a PR if necessary.) ... https://github.com/kkewwei/luceneutil/commit/2c44e536d3a42b686ed4c77e3c10be0976291bfd The ...

#16496 PR: Redesign ReaderUtil.partitionByLeaf to take int[] and add partitionBy…
17.7 hours ago  17 comments  0 votes  0 watches  github-actions[bot], gsmiller, mikemccand, zihanx
…LeafWithOrdinals for scatter/gather [Disclaimer: I work at Amazon customer facing product ... This is the first building block for a future doc-values retriever (scatter/gather); the retriever ... Tracking issue: 15905 # What changed - **partitionByLeaf(ScoreDoc[], leaves) → partitionByLeaf( ...
    zihanx 18.1 hours ago:  Thanks Greg for the detailed benchmark! While you are working on the benchmark I also asked Claude to run a quick local sanity check ... And packedLong also shows better performance than introSorter and performs pretty close to plain: ...
    gsmiller 18.3 hours ago:  Cool, just pushed those changes (should only have touched the benchmark code, not any of your ... Also posting the results I got from running the benchmark here. It's really interesting (to me at least) to see the benchmark validate the merit of the packed-long ...

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