What does the WVS Ops Manager do?

The WVS OPS Manager is a session manager for the Web Visualization Service and addsmultisession functionality to it.

The Service Engine applications managed by the WVS OPS Manager are also labeled WVS Clients.

The WVS OPS Manager:

1. Receives queries for potentially several different projects
   
2. Reserves a Web Visualization Service for each initial connection from a browser and
   
3. forwards all subsequent requests that belong to the same browser session to the same WVS Client
   

Actions of the WVS OPS Manager

The WVS OPS Manager sessions act like the WVS Clients below. This results in the following action:

1. The initial contactability of the WVS Clients managed by the WVS OPS Manager depends on the load time for the projects used.
   
2. Because a new Web Visualization Service is started with each granting of a session, the contactability also depends on the load times of the projects used.
   
3. If the maximum number of sessions has been reached for MaxSessionCount: The user gets an error§message with a new query to this project.
   

Auto-closing of instances 

The following is applicable for the closing of sessions:

1. zenon Service Engine was started by WVS OPS-Manager as a WVS Client.
   The session is separated: The Service Engine closes independently after a configurable timeout.
   
1. If the same session is connected again during the timeout period, the downloading is canceled.
   
2. The timeout starts with the first query to the WVS.
   
2. The time for the timeout after session end is set in zenon6.ini.
   Example:
   [WVS]
   InstanceShutdownTimeout=1200
   Time is given in seconds. 0 is supported. Default: 300 seconds.
3. The time for the timeout after the start of connection is set in zenon6.ini. Example:
   [WVS]
   InitialConnectionShutdownTimeout=1200
   Time is given in seconds. 0 is not supported.

WVS Ops Manager Configuration

It's described in our Online Help how you can configure the Ops Manager.

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