[e2e] number of flows per unit time in routers

[Craig Partridge]

Hi Bob:

Sounds as if I need to provide a bit of context.  If you are tracking
flows (imagine a router keeping track of flows, using, say something like
NetFlow), one question is how many flows do I need to keep track of.
Another question is how fast may I have to create new flows or expire
old flows.  Yet another question, and the one I was aiming at, is that
if I'm archiving flow records over time, at what rate do I have to
archive?

Note that for all but the first question, flows per second makes perfect
sense.

Thanks!

Craig

In message <200510281712.KAA11769 at gra.isi.edu>, Bob Braden writes:

>
>It seems to me that this question is ill-posed.  It seems to make
>sense to talk about the number of flows per time T only when average
>flow duration << T.  So, flows per hour might make since, assuming
>few flows are longer than a few minutes, but flows per second makes
>no sense.
>
>Bob Braden