perfsonar development work

[Nicolas Simar <>]

Jon Kåre Hellan wrote:
> Here are the notes for the parallell session about flow monitoring at
> the JRA1 meeting in Cambridge 2006-01-12.
>
> Chair: Hans Trompert
> Note taker: Jon Kåre Hellan
>
> Agenda:
> 1. New metrics to be added to RRD flow MA
> 2. Use cases
> 3. Design of flow aggregation/selection MA
>
> 1. New metrics to be added to RRD flow MA
>
> The MA now does number of packets, flows and bytes. One request for
> each. Candidates for adding would be protocols, ports, top talkers,
> etc. Counters fit the RRD model, but rankings (top talkers) don't.
>
> UNINETT will wrap Stager as a perfSONAR archive during the summer of
> 2007. Stager offers rankings and a large number of aggregated
> statistics.
>
> The consensus was to extend the RRD flow MA with protocol info: TCP,
> UDP, IPv4, IPv6. Also diffserv if possible. More advanced statistics
> to come from Stager.
>
> 2. Use cases
>
> Some use cases were discussed:
>
> - Security.
>
> - Traffic matrix between sites participating in a project. Maurizio
>  Molina has shown a traffic matrix based on nfdump.
>
> - Using netflow data to verify that the middleware actually starts
>  transferring data when a grid ftp transfer is requested. (Netflow
>  may be the wrong technology for this. There is a delay before flows
>  are emitted.)

Hi Jon,

could you please add to the summary why it may be a wrong technology (or 
what technology would better fit).

Cheers,
Nicolas

> 3. Design of flow aggregation/selection MA
> Hans to circulate a document before the next JRA1 meeting.
>
> There was also a discussion about the legal constraints on sharing
> flow data. Most NRENs are likely to find that they have to be quite
> restrictive about what to share with others. But sharing is possible
> if the groups who are monitored consent to it.

--
Nicolas
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Nicolas Simar
Network Engineer

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