ZooKeeper
- Category
- Databases and data
- Latest
- 3.9.7
- Released
- Oct 30, 2026
- Docs outline
- 12 sections
Official docs outline
zookeeper.apache.org- ZooKeeper Overview
Coordination service, data model, znodes, watches and guarantees.
- Getting Started
Running standalone and replicated ZooKeeper and basic commands.
- Programmer's Guide
Znodes, ephemeral nodes, watches, ACLs, sessions and consistency.
- Recipes and Solutions
Locks, queues, barriers and leader election.
- Administrator's Guide
Deployment, configuration parameters and maintenance.
- Internals
Atomic broadcast (Zab), leader election and logging.
- Dynamic Reconfiguration
Changing ensemble membership at runtime.
- Observers
Non-voting servers for scaling reads.
- Quotas
Limiting znode counts and sizes.
- Authentication and Authorization
ACLs and authentication schemes.
- Monitoring and JMX
Metrics and four-letter-word commands.
- CLI
zkCli commands.
Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.
Versions and support
6 release lines| Line | Released | Latest | Support |
|---|---|---|---|
| 3.9 | Jul 19, 2023 | 3.9.7 | Supported |
| 3.8 | Feb 25, 2022 | 3.8.8 | Supported |
| 3.7 | Mar 17, 2021 | 3.7.2 | Ended Jan 19, 2024 |
| 3.6 | Feb 25, 2020 | 3.6.4 | Ended Dec 30, 2022 |
| 3.5 | May 3, 2019 | 3.5.10 | Ended Jun 1, 2022 |
| 3.4 | Nov 23, 2011 | 3.4.14 | Ended Jun 1, 2020 |
Source: endoflife.date