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#14438 PR: Enable Decompressor to implement Closeable interface.
3.2 hours ago  0 comments  0 votes  0 watches  github-actions[bot], mulugetam
Description In the current implementation, the Compressor class implements the Closeable ... When using Named SPI to plug in custom compressors—like the ones from OpenSearch/custom-codecs—it’d ... This PR aims to fix that.

#14333 PR: A specialized Trie for Block Tree Index
6.2 hours ago  157 comments  0 votes  0 watches  gf2121, github-actions[bot], jpountz, mikemccand
**Context** * #12631 introduced a MSBVLong format to encode the first fp of FST output. It is the first time we benefit from the output sharing in blocktree. The change reduces ~13% tip size, in turn caused a performance regression when accumulating output ...
    jpountz 6.2 hours ago:  Changes look good to me.
    jpountz 6.3 hours ago:  We can remove this version constant now that you're forking the postings format, there is no bw ...

#14435 PR: KeywordField.newSetQuery() to uses prefixed terms for IndexOrDocValuesQuery
6.3 hours ago  2 comments  0 votes  0 watches  github-actions[bot], jainankitk, mkhludnev
fix 14425 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 -->
    jainankitk 6.3 hours ago:  Probably we can use TermInSetQuery.newIndexOrDocValuesQuery(field, values) here?

#14426 PR: Add support for determining off-heap memory requirements for KnnVectorsReader
8.2 hours ago  34 comments  0 votes  0 watches  ChrisHegarty, benwtrent, github-actions[bot], jimczi, mayya-sharipova, tteofili
This PR adds support to KnnVectorsReader in order to determine the off-heap memory requirements. The motivation here is to give better insight into the size of off-heap memory that will be needed, ...
    jimczi 8.2 hours ago:  Yep, then maybe using the file name extension is more consistent? That would be VEC, VEX, VEQ and VEB
    benwtrent 8.7 hours ago:  > I wonder if we should rather reflect the underlying format here. Something like flat_vector_float, flat_vector_byte, flat_vector_bbq? IMO, this is then transforming to just the codec format name as I would expect different formats to ...

#14428 PR: Remove slices creation overhead from IndexSearcher constructor
10.5 hours ago  6 comments  0 votes  0 watches  github-actions[bot], jainankitk, javanna
We simplified the slices creation in IndexSearcher with 13893. That removed the need for a caching supplier, but had an unexpected effect: we eagerly create ... There are situations in which a searcher is created, although search methods that trigger the ...
    jainankitk 10.5 hours ago:  > And by the way, I am still on the fence on whether this is a good change to start with. The overhead caused by the single slice creation that we observed is surprising. While I don't see any downsides of having this change, especially when lazy creation was the ...
    javanna 19 hours ago:  yes we do, this got lost among other changes I reverted in my branch. I also need to add a test to catch similar bugs. And by the way, I am still on the fence on whether this is a good change to start with.

#14178 PR: Add a Faiss codec for KNN searches
11.5 hours ago  97 comments  0 votes  0 watches  benwtrent, github-actions[bot], jimczi, kaivalnp, mikemccand, msokolov, navneet1v
Description Faiss (https://github.com/facebookresearch/faiss) is _"a library for efficient ... OpenSearch has a similar feature, but that is implemented using JNI, which has its own overhead ( ... Faiss provides a nice C API to _"to produce bindings for programming languages with Foreign ...
    kaivalnp 1.8 days ago:  All dependent Faiss PRs are merged: 1. https://github.com/facebookresearch/faiss/pull/4158: ...
    github-actions[bot] 9.1 days 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!

#14226 PR: OptimisticKnnVectorQuery
13 hours ago  54 comments  0 votes  0 watches  benwtrent, dungba88, github-actions[bot], mikemccand, msokolov
Description This is a WIP patch to work out an idea for Knn hit collection that is ... The idea is: 1. Run pro-rated search assuming uniform random topK-document distribution among leaves ( ...
    dungba88 13 hours ago:  I'm also in favor of making this the default behavior. Maybe we can let the lambda parameter to be tuned with a reasonable default value (similar to ... From the benchmark we also saw that the tuning range and impact of this optimistic algorithm is ...
    benwtrent 1.3 days ago:  @dungba88 @msokolov Do we know where we stand with this? I wonder if we should simply use this to replace the current buggy behavior as fanning out to ... Anything I can do to help here?

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