It is used to duplicate a git repository from gerrit to anyway. Configuration file is $GERRIT_INSTALL/etc/replication.config.

Config file example to clone MyRepo from gerrit to backupServer

[remote "backup"]
    url = ProjectUrlOnBackupServer/${name} #Example backup.some.org:/pub/git/${name}.git
    push = +refs/heads/*:refs/heads/*
    push = +refs/tags/*:refs/tags/*
    projects = MyRepo

To reload the plugin, restart Gerrit server or execute following command if install plugin is installed:

ssh -p 29418 localhost gerrit plugin reload replication

Full documentation : Official Replication Plugin Documentation

This plugin is mandatory to make Gerrit able to receive message from other services. As an example, it has to be install to use Sonar Gerrit plugin

• Install jar file under plugins folder
• Default configuration is sufficient