All things related to multicast

[Marshall Eubanks <>]

Tony Rimovsky wrote:

> > From a beacon perspective, I'd be interested in what sort of time
> intervals for testing people think would be appropriate.  
>
> As part of the redesign we are looking at this and trying to strike a
> balance between granularity and capacity concerns.
>
> One option is the server being able to send commands to the beacons do
> initiate a rate change for a period of time.  [Something similar to
> this will be used to trigger group changes for beacon communities in
> order to check for state building problems.]
>
> Also, see <http://farmer.ncsa.uiuc.edu/~tony/beacon.html>.  This is
> something I am playing with.  The interval for these plots is 120
> seconds.  Is a view like this but with a much finer time granularity
> valuable in the context of this discussion?


I really like the strip chart of MacTV - see
http://www.multicasttech.com/rr/kwax_march_4_2002.gif
as an example.

If I had my wish, the beacon page would show

<All inbound> and <All outbound> along the lines of
http://farmer.ncsa.uiuc.edu/~tony/beacon.html

followed by a list of beacons.

Click on one, and you see
<All inbound to that beacon> and <All outbound from that beacon>
followed by a list of beacons.

Click on one, and you see a strip chart (plus a MRTG set of charts) for
that pair of beacons in both directions.

You do need something like MRTG, with a time history, because questions 
like "was xyz.edu up last weekend ?" will come up.

This, at any rate, is one way of doing it.

Marshall


> On Mon, Mar 04, 2002 at 01:57:01PM -0500, Marshall Eubanks wrote:
>
>
> >    MTRG is hopelessly too coarse grained to detect most problems of 
> > interest. We look at things from few second averages down to the audio
> > or video frame level.


--
                                 Regards
                                 Marshall Eubanks

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T.M. Eubanks
Multicast Technologies, Inc
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