[evla-sw-discuss] Delay models to station boards

[Kevin Ryan]

Models should be addressed by Antenna/baseband not by CMIB; the MCCC  
affords that.  We (I think all of us?) agree that Barry's worst-case  
would overly tax MCCC.  Since the Station Board to Antenna is a  
physical thing and since this relationship is mapped in the  
parameters database that Barry mentions, then it should not be a  
problem for the Executor to still send models to Antenna/basebands  
and have them arrive at the proper CMIB.

And this can be done either by unicast or multicast UDP or via the  
current REST/TCP interface that the CMIB uses now to receive models.

The suggestions offered in this thread to cover for UDP's dropped  
packets involve work for the CMIB that it should not have to do, and  
only report the problem without fixing it (assuming that if the CMIB  
did discover and report a dropped model, it is already too late to  
resend it).

Barry's worst case should not burden REST/TCP if the models don't  
have to funnel through MCCC.

Even though Barry originally wanted to "Reaffirm the long term  
direction we want to take", I think we should wait to see how things  
work.  I recommend that we continue with the existing REST/TCP  
interface but bypass the MCCC.  It would serve to satiate those of us  
who want the Berlin Wall between WIDAR and Executor to think of this  
mapping database as a part of the VCI. :)

Kevin

On May 15, 2008, at 8:14 AM, Barry Clark wrote:

> I've made provision for storing this in the parameters database.   
> It was
> called for in Sonja's schema of a couple of years ago, so I put it in.
> MCCC will need to know a lot of this sort of thing too, and I think
> that's OK, so long as we get them from the same database.  When we
> get to talking about code/repository sharing, I'll be urging them to
> use our Parameters class.  I'm quite happy with it at the moment.
>
>
>> From: Bryan Butler <bbutler at nrao.edu>
>>
>>
>> how?
>>
>>
>> Sonja Vrcic wrote:
>>>
>>> EVLA M&C System (Observation Preparation and/or Executor) knows  
>>> which
>>> antenna is connected to which Station Board.
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