--- layout: default title: Apache ORC • High-Performance Columnar Storage for Hadoop overview: true ---

the smallest, fastest columnar storage for Hadoop workloads.

## ACID Support

Includes support for ACID transactions and snapshot isolation

ACID support →

## Built-in Indexes

Jump to the right row with indexes including minimum, maximum, and bloom filters for each column.

ORC's indexes →

## Complex Types

Supports all of Hive's types including the compound types: structs, lists, maps, and unions

ORC's types →

Download the current ORC release.

Quickstart Documentation

- Using with Spark
- Using with Python
- Using with Hive
- Using with Hadoop MapRed
- Using with Hadoop MapReduce
- Using Core ORC from Java

## ORC is an Apache project.

Apache is a non-profit organization helping open-source software projects released under the Apache license and managed with open governance and privacy policy. See upcoming Apache Events. If you discover any security vulnerabilities, please report them privately. Finally, thanks to the sponsors who donate to the Apache Foundation.