perfsonar development work

[Andras Kovacs <>]

Hi Roman,


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.

> 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.

Thanks.
Andras