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Graphic Hub Administrator Guide

Version 3.6 | Published December 10, 2021 ©

Failover/Load Balancing

It is possible to configure Graphic Hub REST to support failover and load balancing. Graphic Hub REST is a standard HTTP server, so there is no need for integrated failover or load balancing logic. This requires setting up a failover and load balancing cluster. A network professional must configure a proxy and the DNS failover.

The proxy covers only the redundancy of Graphic Hub REST. It does not cover redundancy for Pilot or the Media Sequencer.

Important Notes

  • Never call the configuration site through the proxy URL. Always use the direct server configuration URL instead.

  • In a failover/load balancing proxy setup, always configure all Graphic Hub REST nodes to connect to the same Graphic Hub.

    • For very large installations only: Use multiple automatically synchronized Graphic Hubs to increase the performance of big Graphic Hub REST clusters. You achieve this by utilizing the Graphic Hub Deploy Agent.

  • Do not run a proxy on the same server as any Graphic Hub REST node.

  • Add all IP addresses to the proxy configuration on servers with multiple network adapters.

  • Some API calls do not work with a cluster configuration or multiple Graphic Hubs in a cluster:

    • The REST resource monitoring and statistics do not work in a cluster.

    • The Graphic Hub statistics, journals, and sessions, do not work in a cluster with clustered Graphic Hub RESTs connected to multiple Graphic Hubs.

  • The API documentation states proxy cluster compatibility information for every endpoint.