Server-to-Server Distributor

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Server-to-Server Distributor Overview

The Server-to-Server Distributor simplifies the process of configuring tags at the destination Historian and in comparison to the Serve-to-Server collector, provides more flexibility at the SCADA level for tag configuration.

It is useful to send data from a smaller Historian to a larger, centralized Historian for consolidated reporting and analytics. You can use either the Server-to-Server Collector or the Server-to-Server Distributor to send data to a central Historian.

The Server-to-Server Distributor is similar to the Server-to-Server Collector in most functionality. The key difference between the two is in the way the tags are managed. Server-to-Server Collector tags are exclusively managed from the destination Historian server. Server-to-Server Distributor tags can be managed both from the source and destination Historian servers.

The Server-to-Server Distributor forwards only raw data samples, messages, and alarms. It does not perform any calculations on the data.

The following table outlines the features of the Server-to-Server Distributor:

Feature	Capability
Browse Source for Tags	Yes
Browse Source for Tag Attributes	Yes
Polled Collection	No
Minimum Poll Interval	Yes - 100 milliseconds
Unsolicited Collection	Yes
Timestamp Resolution	Yes - 1 millisecond
Data Compression	Yes
Accept Device Timestamps	Yes
Floating Data Point	Yes
Integer Data	Yes
String Data	Yes
Binary Data	No
Allows VB scripting	No
Python Expression Tags	No

Using the Server-to-Server Distributor

The Server-to-Server Distributor should automatically start when you start your system. If it is not running, refer to Data Collectors General > Configuring a Data Collector for automatic Startup.

Note: The distributor must run on a computer with Historian 6.0 or above. The destination archiver can be an older version than 6.0.

To display the Configuration Tab for a Server-to-Server Distributor in the Historian Administrator, select a Server-to-Server Distributor from the list in the left and click the Configuration Tab. The screen shown in the following figure appears.

To display the Configuration screen for a Server-to-Server Distributor in the Historian Administrator, select a Server-to-Server Distributor from the list in the left and click the Configuration tab.

The Collector Specific Configuration (ServerToServerDistributor) screen appears.

The field descriptions are the same as those described in About the Configuration Tab.

Sending Tags from the Server-to-Server Distributor

To send tags from the Server-to-Server Distributor, you require a source and a destination server. Only one Historian server can be run on one computer.

You can add multiple tags from the same collector or different collectors. For more information, see Data Collectors General > Adding Tags to a Collector.

Add tags that you want to send to the Server-to-Server Distributor.
The distributor appears in the list of collectors on the left.
Browse the tags that you want to send to the destination Historian.
The procedure is the same as adding tags from a collector.
Select the tags and click Add Selected Tags.
he tags will appear under the Server-to-Server Distributor in the destination Historian. The naming convention is as follows:
```
nodename.<name of the tag>
```