mirror of https://github.com/apache/lucene.git
a1418d9433
4 and 7 bit quantization still work. It's a bit tricky because 9.11 indices may have 8 bit compressed vectors which are buggy at search time (and users may not realize it, or may not be using them at search time). But the index is still intact since we keep the original full float precision vectors. So, users can force rewrite all their 9.11 written segments (or reindex those docs), and can change to 4 or 7 bit quantization for newly indexed documents. The 9.11 index is still usable. (I added a couple test cases confirming that one can indeed change their mind, indexing a given vector field first with 4 bit quantization, then later (new IndexWriter / Codec) with 7 bit or with no quantization.) I added MIGRATE.md explanation. Separately, I also tightned up the `compress` boolean to throw an exception unless bits=4. Previously (for 7 bit compression) it silently ignored `compress=true` for 7, 8 bit quantization. And tried to improve its javadocs a bit. Closes #13519. |
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| lucene | ||
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README.md
Apache Lucene
Apache Lucene is a high-performance, full-featured text search engine library written in Java.
Online Documentation
This README file only contains basic setup instructions. For more comprehensive documentation, visit:
- Latest Releases: https://lucene.apache.org/core/documentation.html
- Nightly: https://ci-builds.apache.org/job/Lucene/job/Lucene-Artifacts-main/javadoc/
- New contributors should start by reading Contributing Guide
- Build System Documentation: help/
- Migration Guide: lucene/MIGRATE.md
Building
Basic steps:
- Install OpenJDK 21.
- Clone Lucene's git repository (or download the source distribution).
- Run gradle launcher script (
gradlew).
We'll assume that you know how to get and set up the JDK - if you don't, then we suggest starting at https://jdk.java.net/ and learning more about Java, before returning to this README.
Contributing
Bug fixes, improvements and new features are always welcome! Please review the Contributing to Lucene Guide for information on contributing.
- Additional Developer Documentation: dev-docs/
Discussion and Support
- Users Mailing List
- Developers Mailing List
- IRC:
#luceneand#lucene-devon freenode.net