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OPC-UA server per location or hardware
November 1, 2013
12:46, EET
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vonGohren
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October 17, 2013
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Hi, first of all I would say that I appriciate the answeres I recieve here and sorry for all the questions. Its just I dont have alot of people discussing OPC-UA with at my school.

But I wonder what some pros and cons would be on the topic name? Should one serve up a server per location and let that server handle all the hardware and models. Or should one serve up a server per hardware. The reason this question arrises is because of the dynamism OSGi provides. The JVM should always run and one should be able to plug in new hardware and drop a bundle to handle this hardware. But what would be the best for OPC-UA server, creating a new one? Or registering events and models on the existing server dynamically? I know models and nodes can come and go, but is it so for events and alll other types?

November 1, 2013
13:18, EET
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Jouni Aro
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It’s good to hear, if you get more understanding here.

I think in general it is better to have one “big” server, which has all the hardware components in the same address space. You can then access them all and possibly create useful hierarchies or other relations between the components as necessary. The clients can also manage a single connection much better than multiple connections. And it is possible to notify them about changes in the address space than in an unknown number of servers.

All nodes can be added and removed dynamically in the server.

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