perfsonar development work

[Roman Lapacz <>]

Andras Kovacs wrote:
> Hi Roman,
Hi
> The testing is only about to test the signalling, not the traffic. If 
> there is packet loss inbetween, it is the task of PERT or NREN or/and 
> GN2 NOCs to solve the problems.
>
> Here, we would like to only check that the international 
> infrastructure allowing countries to peer works or not.

I see your point but it could be very useful for troubleshooting to 
monitor both levels: 1) signaling and 2) network transmission (even 
using simple ping) in the same infrastructure. Doing regular test you 
would have quite complete view (signalling information and base traffic 
statistics).

> > First we need to investigate and write down the names of metrics to 
> > be monitored. I think in this kind of monitoring important are delay 
> > (owd), jitter and packet drops (of course there might be more).
> In the very first version (until the end of GN2 project), we only plan 
> to measure up/down, it is enough to cover our needs.
>
> > I guess that Andras wants to focus on passive monitoring (monitoring 
> > the traffic during VC transmission). A test tool like BWCTL could be 
> > used as well but test traffic should have characteristics similar to 
> > real VC transmissions.
> This is not, right, see the aboves.
>
> > > c) How will they access the information? (what visualisation tool, 
> > > you hinted one below) How will it be the data represented to them?
> > > You mention a clickable weathermap. Can you provide a little bit 
> > > more information about this.
> > > (please see a status page: http://perfsonar.acad.bg/status/ and how 
> > > we might be building another similar page for the network services 
> > > at a later stage: 
> > > http://wiki.geant2.net/bin/view/SA3/SaThreeAppNrenStatusPage)
> >
> > The application made by Yee could be also considered (it's based on 
> > Google maps). It looks really nice and I remember it had very (!) 
> > positive opinions during last I2 conference.
> Is there an example to see this application? We would like to use 
> geographical representation for other purposes, we might want to 
> integrate monitoring into this.

Knowing more about your plans I don't think this app is for you. Maybe 
Yee or Nicolas could say more.

Roman