Orion products has the Failover Engine to make them high-availability.
But the FoE does not support STM, as much as I can explore.
Does anyone know STM installation running in some failover-supported hosts ?
One of SolarWinds support engineer answered me as below:
There are no redundancy platform for STM.
Let me raise it as a feature request to the developers to take into consideration.
I will post a feature request too, later.