Apache BookKeeper is a scalable, fault tolerant and low latency storage service optimized for append-only workloads.

It is suitable for being used in following scenarios:

• WAL (Write-Ahead-Logging), e.g. HDFS NameNode.
• Message Store, e.g. Apache Pulsar.
• Offset/Cursor Store, e.g. Apache Pulsar.
• Object/Blob Store, e.g. storing state machine snapshots.

• Concepts: Start with the basic concepts of Apache BookKeeper. This will help you to fully understand the other parts of the documentation.
• Getting Started to setup BookKeeper to write logs.

• Programmer Guide
• Tutorial
• Java API

You can also read Turning Ledgers into Logs to learn how to turn ledgers into continuous log streams. If you are looking for a high level log stream API, you can checkout DistributedLog.

• Admin Guide
• Configuration Parameters

• BookKeeper Internals

For filing bugs, suggesting improvements, or requesting new features, help us out by opening a Github issue or opening an Apache jira.

Subscribe or mail the [email protected] list - Ask questions, find answers, and also help other users.

Subscribe or mail the [email protected] list - Join development discussions, propose new ideas and connect with contributors.

Join us on Slack - This is the most immediate way to connect with Apache BookKeeper committers and contributors.

We feel that a welcoming open community is important and welcome contributions.

1. See Developer Setup to get your local environment setup.

2. Take a look at our open issues: JIRA Issues Github Issues.

3. Review our coding style and follow our pull requests to learn about our conventions.

4. Make your changes according to our contribution guide.

1. See Building the website and documentation on how to build the website and documentation.