This topic assumes you have read the Guidelines for setting up multi-server services

Replication is the duplication of server data from the master serverClosed The innermost Helix Core server in a multi-server topology. A commit server can also be referred to as a master server. to the replicaClosed A Helix Core Server that automatically maintains a full or partial copy of the master server's metadata and that might contain related file content. The replica copies from its master by using 'p4 pull' or 'p4 journalcopy'. A replica can be used as a backup server for disaster recovery., ideally in real time. You can use replication to:

  • Provide warm standby servers

    A replica server can function as an up-to-date warm standby system to be used if the master server fails. Such a replica server requires that both server metadata and versioned files are replicated.

  • Reduce load and downtime on a primary server

  • Provide support for build farms

    A replica with a local (non-replicated) storage for client workspaces (and their respective have lists) is capable of running as a build farm.

  • Forward write requests to a central server

    A forwarding replica holds a readable cache of both versioned files and metadata, and forwards commands that write metadata or file content towards a central server. A forwarding replica offers a blend of the functionality of the Helix Proxy with the improved performance of a replica. (See Forwarding replica.)

Combined with a centralized authorization server, Helix Server administrators can configure the Helix Broker to redirect commands to replica servers to balance load efficiently across an arbitrary number of replica servers. See Centralized authorization server (P4AUTH) and Helix Broker.


Helix Core also supports Failover, which involves replication.

If you require read and write access to a remote server

Most replica configurations are intended for reading of data. If you require read and write access to a remote server, consider using a:

Additional information

The following provide additional information about replication.