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#15721 PR: Minor refactor/fix to l2normalize
41.4 minutes ago  1 comments  0 votes  0 watches  benwtrent, github-actions[bot], shubhamvishu
Description - Minor change fixes the wrongly named variable(confusing) as l1norm whereas it ... -- If this is your first contribution to Lucene, please make sure you have reviewed the ... https://github.com/apache/lucene/blob/main/CONTRIBUTING.md -->

#15720 PR: GITHUB#15480 Deprecate SortField#setMissingValue and add migration test
2 hours ago  0 comments  0 votes  0 watches  SYEDMDSAAD, github-actions[bot]
This change prepares SortField for immutability by deprecating setMissingValue and adding tests ... No behavior changes are introduced.

#15708 PR: Add optional query bit size hint to KnnSearchStrategy.Hnsw
2.1 hours ago  3 comments  0 votes  0 watches  arup-chauhan, benwtrent, github-actions[bot]
This PR introduces an optional query bit-size hint for KnnSearchStrategy.Hnsw as a first ... I intentionally limited the scope to search-strategy API plumbing and tests to keep risk low. Default behavior remains unchanged: the new hint is metadata-only in this PR and does not alter ...
    benwtrent 2.1 hours ago:  I wonder what @mccullocht thinks? I know when we were discussing the new scalar formats, we stuck to a static query bits for doc ... I am on the fence on the complexity this potentially adds for users.
    benwtrent 2.2 hours ago:  This should be in 10.5, please make sure you have merged in latest main.

#15712 PR: Tests: Remove backward compatibility tests older than previous major version
4.2 hours ago  5 comments  0 votes  0 watches  github-actions[bot], rmuir, spinscale
This does not remove tests checking the inability to opening older indices, but all the unit tests ... This removes mainly nightly unit tests regarding Lucene versions 5, 6, 7 and 8, as those are at ... Closes 15673 Note: I have deleted quite a bit of code here in the backwards-codec directory - ...
    rmuir 4.2 hours ago:  Thank you for this cleanup! Nice diffstat
    spinscale 12.3 hours ago:  Thanks for catching that. That was an overdelete, as the classes in there are still in use in the tests.

#15676 PR: Feature/collaborative hnsw search
4.8 hours ago  8 comments  0 votes  0 watches  benwtrent, github-actions[bot], krickert, navneet1v
[HNSW] Collaborative Search via Dynamic Threshold Feedback > **Status: Experimental** - This ... Full distributed multi-shard testing will happen in a follow-up PR for OpenSearch.
    krickert 21.9 hours ago:  @benwtrent @navneet1v - quick status update on a distributed KNN prototype. I implemented a gRPC/HTTP2 streaming coordinator + shard model for collaborative HNSW search ( ... Early results | Metric | Observation | |--------|-------------| | **Recall** | Matched ...
    krickert 6.4 days ago:   Distributed Validation Progress: Collaborative HNSW Pruning So testing is now transitioning ... I've discovered that single-host simulations masked a "Coherence Tax" of distributed HNSW search. So testing on real hardware over a LAN is the only way to measure the trade-off between ...

#15719 PR: GITHUB#15225: Improve JavaDocs for org.apache.lucene.util package
6.5 hours ago  0 comments  0 votes  0 watches  SYEDMDSAAD, github-actions[bot]
Related to 15225 This PR improves the package-level documentation for org.apache.lucene.util. The previous documentation only contained a minimal description. This change adds an overview of the purpose of the package, typical contents, and guidance about ...

#15549 PR: Add half-float (FP16) storage support for vectors
7 hours ago  19 comments  0 votes  0 watches  Pulkitg64, benwtrent, github-actions[bot], mikemccand, rmuir
Description This draft PR explores storing float vectors using 2 bytes (half-float/FP16) ... The approach involves storing vectors on disk in half-float format while converting them back to ... However, this conversion step introduces additional overhead during vector reads, resulting in ...
    mikemccand 7 hours ago:  Thanks @Pulkitg64, this is a very exciting change. It's frustrating to receive fp16 vectors (at Amazon Customer facing product search team) for ... And because these fluffy vectors take 2X the storage they really should have, we build ways to drop ...
    Pulkitg64 7.7 days ago:  I have removed the panama implementation for now but we can add them later once we have access to ... Below are the benchmark numbers with default implementation: **Summary**: Used 100k docs ... For no quantization case, we are seeing high regression in latency more than 100% (which is ...

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