Free and Open Source, Distributed, RESTful Search Engine

Google core libraries for Java

Netty project - an event-driven asynchronous network application framework

Apache Flink

High Performance Inter-Thread Messaging Library

🚌 The IK Analysis plugin integrates Lucene IK analyzer into Elasticsearch and OpenSearch, support customized dictionary.

The official home of the Presto distributed SQL query engine for big data

Apache Doris is an easy-to-use, high performance and unified analytics database.

Apache Druid: a high performance real-time analytics database.

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance …

Apache Calcite

Apache Log4j is a versatile, feature-rich, efficient logging API and backend for Java.

This code base is retained for historical interest only, please visit Apache Incubator Repo for latest one

Baidu Elasticsearch

Fast and efficient batch computation engine for complex analysis and reporting of massive datasets on Hadoop