On Fri, Dec 18, 2015 at 11:00:46AM -0500, Mike De Gasperis wrote:
> You don't need to run the dsmcad technically speaking. You can just
> run a dsmc sched daemon or service.

Running the scheduler on-demand frees up the memory used by backup
jobs when it is no longer needed. Often the amount of memory used is
non-trivial. And long-running schedulers leak memory, at least with
some versions. Dsmcad solves this nicely, there is just this design
flaw, which I'd patch immediately if TSM wasn't proprietary
software. If the inbound port serves no purpose in polling-mode-only
configuration, there is no excuse in listening to it.

AFAIK, IBM recommends using CAS as best practice and Linux packages
install dsmcad service by default, so probably majority of users runs
it that way.