For any other servers it finds, such as Plex Server 2, it forwards the request on to them and the show is instantly marked as watched up to that midway point.

Plex Cluster Manager takes the request and checks for any other Plex server with a library named TV Shows and GUID ABC.

The request goes through Plex Cluster Proxy 1 and is passed along to Plex Server 1, but is also passed along to Plex Cluster Manager.

The request goes through Plex Cluster Proxy 1 and is passed along to Plex Server 1.

Plex client requests to watch a show with GIUD (unique identifier) ABC from the TV Shows library on Plex Server 1.

There is only one instance of Plex Cluster Manager which is used by all instances of Plex Cluster Proxy.

Plex Cluster Manager is then used to synchronize the status between Plex servers.

There is one instance of Plex Cluster Proxy for each Plex server. This application's job is to pass any requests that come to it along to the Plex server while catching any requests that mark watched status and also forwarding them on the Plex Cluster Manager.

Plex Cluster Proxy, which is installed alongside every Plex server and acts as a proxy (using nginx) between Plex Media Server and the internet.

Synchronizes the watched and timeline status between any number of Plex servers all using standard Plex APIs.

Plex home server