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About Installing Historian in a Distributed Environment

A distributed environment implies a horizontally scalable Historian system, which contains multiple Historian servers, all of which are connected to one another. This type of system is used to scale out the system horizontally. For example, if you have 5,00,000 tags in your Historian system, you can distribute them among the various servers to improve performance.

In this setup, one of the nodes acts the primary server, whereas the others are the distributed nodes. Configuration Manager and the embedded web services are installed only on the primary server, which are used by the distributed nodes as well.

When the Archive Duration property is changed in a distributed environment, the changes will take effect after 15 minutes.

The distributed environment works only for tag data; it does not work for alarms and events data. Therefore, do not install alarm archiver in a distributed environment.