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#13951 PR: Support multi-tenant RAM buffers for IndexWriter
43.2 minutes ago  27 comments  0 votes  0 watches  jpountz, mdmarshmallow, vigyasharma
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 --> Draft PR to outline my initial ...
    vigyasharma 43.2 minutes ago:  Sorry it took so long to get to this PR. I have some code refactoring comments that should help simplify the changes.
    vigyasharma 45.4 minutes ago:  Any reason for not making this change in the default constructor? We could avoid making changes to all the tests.

#14005 PR: Update ComplexPhraseQueryParser.java
4.1 hours ago  0 comments  0 votes  0 watches  paulk-asert
Fix typo 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 -->

#266 PR: LUCENE-10073: Reduce merging overhead of NRT by using a greater mergeFactor on tiny segments.
4.9 hours ago  10 comments  0 votes  0 watches  github-actions[bot], jpountz, mikemccand
#11111
    jpountz 10.8 hours ago:  You are right, these were duplicate variables!
    jpountz 10.8 hours ago:  Thank you, fixed.

#14004: How to configure TieredMergePolicy for very low segment count?
7.4 hours ago  2 comments  0 votes  0 watches  jpountz
Description I have been experimenting with configuring TieredMergePolicy to keep the segment ... Interestingly, an index that is less than 1GB can still have 10 segments with the above merge ... E.g. consider the following segment sizes: 100kB, 300kB, 800kB, 2MB, 5MB, 12MB, 30MB, 70MB, 150MB, ...
    jpountz 7.4 hours ago:  I confirmed that #266 seems to help for this case. It does find merges to run with the above example (100kB, 300kB, 800kB, 2MB, 5MB, 12MB, 30MB, 70MB, ... And when I run our simulation tests in BaseMergePolicyTestCase, it ends up with a similar number of ...
    jpountz 12.2 hours ago:  Interestingly, it looks like this PR https://github.com/apache/lucene/pull/266 would do what I'm ...

#13525 PR: [WIP] Multi-Vector support for HNSW search
8.2 hours ago  83 comments  0 votes  0 watches  benwtrent, cpoerschke, github-actions[bot], jimczi, krickert, mikemccand, msokolov, navneet1v, vigyasharma
Adds support for multi-valued vectors to Lucene. In addition to max-similarity aggregations like parent-block joins, this change supports ColBERT ... Documents can have a variable number of vector values, but to support distance function ...
    krickert 8.2 hours ago:  > Chunk-Based Highlighting – Interesting. With getAllVectorValues(), we can find all vector values with similarity above a separate ... Not sure.
    vigyasharma 10.3 hours ago:  Thank you for sharing these use-cases @krickert ! 1. **Aggregate Scoring** – I think we can do this today by joining the child doc hits with their ...

#13985 PR: Introduces IndexInput#updateReadAdvice to change the ReadAdvice while merging vectors
8.9 hours ago  36 comments  0 votes  0 watches  ChrisHegarty, jpountz, navneet1v, shatejas, uschindler
The change is needed to be able to reduce the force merge time. Lucene99FlatVectorsReader is opened with IOContext.RANDOM, this optimizes searches with madvise as ... For merges we need sequential access and ability to preload pages to be able to shorten the merge ...
    shatejas 9.2 hours ago:  > The org.apache.lucene.index.TestConcurrentMergeScheduler.testNoWaitClose test hits a new assert ... I need to look to see if it is a test issue or more of a design issue with finishMerge.
    ChrisHegarty 13.3 hours ago:  The org.apache.lucene.index.TestConcurrentMergeScheduler.testNoWaitClose test hits a new assert ... I need to look to see if it is a test issue or more of a design issue with finishMerge.

#13387: Support for criteria based DWPT selection inside DocumentWriter
10.1 hours ago  23 comments  0 votes  0 watches  RS146BIJAY, jpountz, mikemccand, vigyasharma
Description # Issue Today, Lucene internally creates multiple DocumentWriterPerThread (DWPT) ... When documents are indexed by the same DWPT, they are grouped into the same segment post flush. As DWPT assignment to documents is only concurrency based, it’s not possible to predict or control ...
    vigyasharma 10.1 hours ago:  There is a lot of good work here @RS146BIJAY . Some preliminary questions to understand this better: 1. Does the OpenSearch client directly work with 'n' different log-group specific IndexWriters?
    RS146BIJAY 13.5 hours ago:  @vigyasharma @jpountz @mikemccand Any thoughts on the above approach on using multiple IndexWriter ...

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