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This gives implementations of `findFullFlushMerges` to `LogMergePolicy` and `TieredMergePolicy` and enables merge-on-refresh with a default timeout of 500ms. The idea behind the 500ms default is that it felt both high-enough to have time to run merges of small segments, and low enough that the freshness of the data wouldn't look badly affected for users who have high refresh rates (e.g. refreshing every second). In both cases, `findFullFlushMerges` delegates to `findMerges` and filters merges whose segments are all below the min/floor size.
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/
- Build System Documentation: help/
- Developer Documentation: dev-docs/
- Migration Guide: lucene/MIGRATE.md
Building
Basic steps:
- Install OpenJDK 17 (exactly this version).
- 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.
See Contributing Guide for details.
Contributing
Bug fixes, improvements and new features are always welcome! Please review the Contributing to Lucene Guide for information on contributing.
Discussion and Support
- Users Mailing List
- Developers Mailing List
- Issue Tracker
- IRC:
#luceneand#lucene-devon freenode.net