Message Facility host
On SBN we are doing multi server runs on the private subnet, spawning processes on
sbn-daq01. Setting the hostname that goes on the MessageFacility.fcl file as localhost doesn't work. To be able to pick up the messages of both hosts you need to set it to
sbn-daq01-priv, I believe this depends on the node from which you start up the interface.
Is there a way in which setting localhost will recognise that it need to be private subnet? So that there's no need to edit the fcl file depending on the server you are running.
I think this might be related to Bug #22785.
#1 Updated by John Freeman 3 months ago
It's definitely true that setting the hostname to "localhost" in MessageFacility.fcl wouldn't work, since MessageFacility.fcl will be passed to artdaq processes on different nodes, but the hostname needs to refer to the host which is running MessageViewer. DAQInterface is a general-purpose piece of software which is used by many different experiments, so it doesn't have any direct knowledge of sbn-daq01-priv or sbnd-daq33-priv.
So, the question remains, how can you get MessageFacility.fcl to contain the hostname value you want? It seems one way to do it would be to automatically edit MessageFacility.fcl via a sed command in one of your start scripts, so that the hostname would be set to the value of the node you decided to launch DAQInterface on.