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Apache Lucene open-source search software
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Python 0.9%
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Adrien Grand f7cab16450
Add a merge policy wrapper that performs recursive graph bisection on merge. (#12622) 
This adds `BPReorderingMergePolicy`, a merge policy wrapper that reorders doc
IDs on merge using a `BPIndexReorderer`.
 - Reordering always run on forced merges.
 - A `minNaturalMergeNumDocs` parameter helps only enable reordering on the
   larger merged segments. This way, small merges retain all merging
   optimizations like bulk copying of stored fields, and only the larger
   segments - which are the most important for search performance - get
   reordered.
 - If not enough RAM is available to perform reordering, reordering is skipped.

To make this work, I had to add the ability for any merge to reorder doc IDs of
the merged segment via `OneMerge#reorder`. `MockRandomMergePolicy` from the
test framework randomly reverts the order of documents in a merged segment to
make sure this logic is properly exercised.
 		2023-11-23 13:25:00 +01:00
.github Build: build scans on ge.apache.org to benefit from deep build insights (#12293) 2023-10-24 12:32:18 -04:00
buildSrc LUCENE-10144:fix resource leak due to Files.list (#354) 2023-11-02 06:53:48 -04:00
dev-docs a bit of clarification about GitHub Milestone 2022-08-28 13:52:58 +09:00
dev-tools script to run microbenchmarks across different ec2 instance types (#12787) 2023-11-10 12:31:10 -05:00
gradle Fix errorprone with alternative runtime (#12808) 2023-11-14 22:56:55 +01:00
help Add downloading binutils instructions for the macos. (#12804) 2023-11-14 05:51:51 -05:00
lucene Add a merge policy wrapper that performs recursive graph bisection on merge. (#12622) 2023-11-23 13:25:00 +01:00
.asf.yaml .asf.yaml 2022-08-16 20:02:47 +09:00
.dir-locals.el LUCENE-9322: Add Lucene90 codec, including VectorFormat 2020-10-18 07:49:36 -04:00
.git-blame-ignore-revs GITHUB#12655: Add google java format upgrade tidy / regen to blame ignore 2023-10-11 16:15:42 -04:00
.gitattributes LUCENE-10305: Ensure line endings of versions.props is LF 2021-12-11 10:10:44 +09:00
.gitignore LUCENE-9920: Remove binary gradle-wrapper.jar from the repository 2021-04-10 16:08:39 +02:00
.hgignore
…
.lift.toml Disable liftbot, we have our own tools 2022-05-05 22:27:57 +02:00
CONTRIBUTING.md Fix type in CONTRIBUTING.md (#11879) 2022-11-01 20:10:05 +00:00
LICENSE.txt LUCENE-10163 Move LICENSE and NOTICE file to top level (#388) 2021-10-18 01:24:11 +02:00
NOTICE.txt Cleanup NOTICE.txt (#12227) 2023-04-18 15:58:09 -04:00
README.md Allow building with java 18 now that gradle supports it (#11889) 2022-10-28 23:41:09 -04:00
build.gradle GITHUB#12655: upgrade jacoco aggregation plugin (failed with gradle 8.x), change html output property. 2023-10-12 20:42:17 +02:00
gradlew GITHUB#12655: Upgrade to Gradle 8.4 2023-10-11 16:11:53 -04:00
gradlew.bat GITHUB#12655: Upgrade to Gradle 8.4 2023-10-11 16:11:53 -04:00
settings.gradle Build: build scans on ge.apache.org to benefit from deep build insights (#12293) 2023-10-24 12:32:18 -04:00
versions.lock GITHUB#11277, LUCENE-10241: Upgrade to OpenNLP to 1.9.4. (#448) 2023-11-17 15:51:31 +00:00
versions.props GITHUB#11277, LUCENE-10241: Upgrade to OpenNLP to 1.9.4. (#448) 2023-11-17 15:51:31 +00:00

README.md

Apache Lucene

Lucene Logo

Apache Lucene is a high-performance, full-featured text search engine library written in Java.

Build Status

Online Documentation

This README file only contains basic setup instructions. For more comprehensive documentation, visit:

Building

Basic steps:

  1. Install OpenJDK 17 or 18.
  2. Clone Lucene's git repository (or download the source distribution).
  3. 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