NDOS Shifter Instructions¶

Starting the Trigger¶

Here is how you start the trigger processes on the buffer nodes:

1. Click on the "DDT Manager" icon on the same display as NDOS Run Control:

2. The following manager screen should pop up (you might have to scroll around the display to find it):

3. Click the "Start Group" button to start all of the processes and when they are all running it should look like this:

Stopping the Trigger¶

1. Click the "Stop Group" button and wait until everything is pink (not running).

2. Click on File -> Exit to exit the manager:

Recovering a Trigger¶

Occasionally a trigger process might die, so you can recover it as follows:

1. Send an email to novaddt@fnal.gov telling us which trigger process died. For example, trigger process 002 died here:

2. Right-click on the dead process and click "Start Process":

3. Everything should be green again.

4. If the process dies more than twice in an hour, do not restart it again, but notify us via email.