| # Gerrit Zookeeper ref-db | 
 |  | 
 | This plugin provides an implementation of the Gerrit global ref-db backed by | 
 | [Apache Zookeeper](https://zookeeper.apache.org/). | 
 |  | 
 | Requirements for using this plugin are: | 
 |  | 
 | - Gerrit v3.2 or later | 
 | - Apache Zookeeper v3.4 or later | 
 |  | 
 | ## Typical use-case | 
 |  | 
 | The global ref-db is a typical use-case of a Gerrit multi-master scenario | 
 | in a multi-site setup. Refer to the | 
 | [Gerrit multi-site plugin](https://gerrit.googlesource.com/plugins/multi-site/+/master/DESIGN.md) | 
 | for more details on the high level architecture. |