[atlas] Some UDM comments

Hi,

> I'm working on creating some measurements and haven't quite moved into using the API yet and wanted to provide some feedback:

Thanks, it's always appreciated!

> 1) When creating a UDM, when it's scheduled but not yet assigned to probe(s), it would be nice to be able to increase the # of probes.

This is somewhat tricky, because the answer is: it depends. If you schedule
a measurement to be started in the future, then you can always just cancel
the original one and schedule a new one. One can also change the set of
probes for already running measurements, Although we don't recommend it
because it can be very confusing when you interpret the results.

> 5) If I see a probe that is behaving poorly, eg: UDM 1665566 Probe# 3925, should I be providing feedback on this to others?

I believe that such bits of information could be useful. But, since they are
one-to-one messages, it's probably not so useful to do them on this list :-)

Would there be a need for an in-Atlas messaging service? If so, what should
it allow / prevent? We have been thinking about such a thing before, but I
would not want to pre-empt a useful discussion by exposing too much of our
own ideas :-)

Cheers,
Robert