Pegasus halt functionality

[ahnitz]

I just recently noticed 'pegasus-halt'. This is very useful functionality. An extension of this would make it much more useful which is to actually remove idle jobs also. Currently, it seems to be able to stop new jobs being submitted, but if it could also kill any non-running jobs that would make it much more powerful to allow the workflow to drain immediately without losing any partial work.

[rynge]

This is a good idea. Our halt implementation is an extension on functionality in the HTCondor DAGMan, and problem is that DAGMan does not have any way to remove the idle jobs (https://htcondor.readthedocs.io/en/lts/automated-workflows/dagman-interaction.html#suspending-a-running-dag). I will talk to the HTCondor developers.