perfsonar development work

["Vedrin Jeliazkov" <>]

Hi Nicolas,

Nicolas Simar 
<>
 wrote:

> Hi Vedrin and Nina,
> 
> as a user, I don't know when a MA is down or not. When selecting one 
> which is done and starting a request, I get the message that it wasn't 
> possible to contact the MA and that he can decide to querry it again.

Yes, you're right that we should find a better solution for the "MA down"
problem. We already have on our TODO list a related task (F09):

http://wiki.perfsonar.net/jra1-wiki/index.php/PerfsonarUI#TO_DO

> Would it be possible to indicate to the user if the MA is down (i.e. be 
> more specific about why it wasn't possible to get an answer from the 
> MA)? I am not sure that it is possible.

Yes, we will implement a more reasonable error reporting, which will hopefully
give the end-user an idea whether it's a good idea to try certain request
again or not.

> PS: An ideal scenario would be to querry the LS when pSUI is
> launched and indicates which MAs are down (or not indicate them), > so that
the user know that he shouldn't use them.

Yes - this would be definitely the best solution, once we have reached an
agreement and deployed LS(es) which know(s) about all MAs. It's not a problem
to implement this in perfsonarUI - in fact it should be its default behaviour
(presenting a list of MAs, learned through LS(es) and having a high
probability to be alive).

Kind regards,
Vedrin