[atlas]P466 - inconsistent readings?

Hi Robert, Team!

Robert Kisteleki wrote:

> On 2010.11.29. 14:53, Wilfried Woeber, UniVie/ACOnet wrote:
> 
>>Hi Team,
>>
>>could you pls. have a look at the grpahs of 466 and the list of
>>"perceived" outages for the probe?
>>
>>While I can't prove that there wasn't some problem with my ADSL link at
>>home (while sitting in the office :-) ), the graphs for the pings seem
>>to indicate that the probe was alive and kicking all the time.
>>
>>I may be misreading some stuff, though....
>>Wilfried
>>
> 
> 
> 
> Your graphs look fine to me now. Maybe I missed the window of opportunity? :-)

Maybe :-)

My point is that the "outage panel" lists a lot of "downs" for yesterday,
but these periods are not visible in the graphs for that timeframe as grey
"no data" bars. Given the stability of my ADSL link, I'd rather believe in
the graphs instead of the list of down-up transitions.

So, I probably should have asked: which criteria do you select or evaluate
to declare a probe "down" and then "up" again? :-)

> Seriously: if there's a structural problem, then _all_ the graphs will have
> gaps in exactly the same intervals. This is easy to spot as on the probe
> status page all the graphs are nicely aligned.
> 
> Robert

Btw, just to make that clear, this is not a complaint or an attempt to bother
you excessively. I "simply" try to understand how this stuff works.

Because I consider this understanding as essential to grok the information in
the graphs (and to be able to make potential probe-sponsors intersted).

Cheers,
Wilfried.