Description Durable subscriptions are OPC UA subscriptions with a very long lifetime and large queues so that monitored data can be collected and stored during times where the Client is disconnected. When the disconnected Client connects and creates a Session it will transfer the Subscription to this Session and receive the queued data and events.
- "Disconnected Client" - i.e. Client can connect only once or a few times a day
- Stored data and events are available even after server restart