apache

Iceberg

Apache Iceberg
Under Apache License 2.0
By apache

apache hacktoberfest iceberg



Apache Iceberg is a new table format for storing large, slow-moving tabular data. It is designed to improve on the de-facto standard table layout built into Hive, Trino, and Spark.


Background and documentation is available at https://iceberg.apache.org


Status

Iceberg is under active development at the Apache Software Foundation.


The core Java library that tracks table snapshots and metadata is complete, but still evolving. Current work is focused on adding row-level deletes and upserts, and integration work with new engines like Flink and Hive.


The Iceberg format specification is being actively updated and is open for comment. Until the specification is complete and released, it carries no compatibility guarantees. The spec is currently evolving as the Java reference implementation changes.


Java API javadocs are available for the master.


Collaboration

Iceberg tracks issues in GitHub and prefers to receive contributions as pull requests.


Community discussions happen primarily on the dev mailing list or on specific issues.


Building

Iceberg is built using Gradle 5.4.1 with Java 1.8 or Java 11.



Iceberg table support is organized in library modules:



This project Iceberg also has modules for adding Iceberg support to processing engines:



Compatibility

Iceberg's Spark integration is compatible with Spark 2.4 and Spark 3.0 using the modules in the following table:


| Iceberg version | Spark 2.4.x | Spark 3.0.x |
| --------------- | ------------- | -------------- |
| master branch | spark-runtime | spark3-runtime |
| 0.9.0 | spark-runtime | spark3-runtime |
| 0.8.0 | spark-runtime | |