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Apache Lucene open-source search software
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Adrien Grand 8f89db8048
LUCENE-10536: Slightly better compression of doc values' terms dictionaries. (#838) 
Doc values terms dictionaries keep the first term of each block uncompressed so
that they can somewhat efficiently perform binary searches across blocks.
Suffixes of the other 63 terms are compressed together using LZ4 to leverage
redundancy across suffixes. This change improves compression a bit by using the
first (uncompressed) term of each block as a dictionary when compressing
suffixes of the 63 other terms. This helps with compressing the first few
suffixes when there's not much context yet that can be leveraged to find
duplicates.
 		2022-05-12 10:32:58 +02:00
.github LUCENE-10532: remove @Slow annotation (#832) 2022-05-09 23:03:55 -04:00
buildSrc fail clearly on too-new JDK (#819) 2022-04-21 09:22:26 -04:00
dev-docs Add documentation on file formats. (#598) 2022-01-11 15:16:05 +01:00
dev-tools LUCENE-10532: remove @Slow annotation (#832) 2022-05-09 23:03:55 -04:00
gradle LUCENE-10532: remove @Slow annotation (#832) 2022-05-09 23:03:55 -04:00
help LUCENE-10532: remove @Slow annotation (#832) 2022-05-09 23:03:55 -04:00
lucene LUCENE-10536: Slightly better compression of doc values' terms dictionaries. (#838) 2022-05-12 10:32:58 +02:00
.asf.yaml titles for github 2021-03-10 12:51:06 +01:00
.dir-locals.el
…
.git-blame-ignore-revs LUCENE-9570: code reformatting [record rev]. 2021-01-05 13:44:42 +01:00
.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 Make CONTRIBUTING.md a bit more succinct (#866) 2022-05-05 10:35:33 +09:00
LICENSE.txt LUCENE-10163 Move LICENSE and NOTICE file to top level (#388) 2021-10-18 01:24:11 +02:00
NOTICE.txt LUCENE-10416: Update Korean Dictionary to mecab-ko-dic-2.1.1-20180720 for Nori 2022-02-20 21:39:03 +09:00
README.md Fix incorrect docs in README.md: it must be java 17 exactly, java 18 does not work (#818) 2022-04-20 11:07:24 -04:00
build.gradle LUCENE-10535: upgrade com.palantir.consistent-versions to 2.10.0 2022-04-26 08:31:15 +02:00
gradlew fail clearly on too-new JDK (#819) 2022-04-21 09:22:26 -04:00
gradlew.bat Fix JVM error branch logic. (#835) 2022-04-25 14:33:56 +02:00
settings.gradle LUCENE-10328: Module path for compiling and running tests is wrong (#571) 2022-01-05 20:42:02 +01:00
versions.lock LUCENE-8930: script testing in the distribution (#550) 2022-01-20 00:09:15 +09:00
versions.props LUCENE-8930: script testing in the distribution (#550) 2022-01-20 00:09:15 +09:00

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 (exactly this version).
  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