[Nrg-l] NRG tomorrow @2pm

Niky Riga inki at cs.bu.edu
Tue Jun 14 18:16:12 EDT 2005

Since the paper can't be found online, Vijay send me a copy that the 
author gave to him and it can be downloaded from


Niky Riga wrote:

> Hi,
> Tomorrow Vijay is going to present a paper from SIGMETRICS 2005; he 
> just came back really excited:-) The paper is titled
> "Fundamental Bounds on the Accuracy of Network Performance Measurements"
> The meeting will take place tomorrow (Wednesday 6/15) at the grad 
> lounge at 2:00pm.
> The abstract follows.
> One more thing about the time of NRG. It would be more convinient for 
> me, e.g. I would be able to attend, if we move the time to 4-5pm. I 
> understand that this might be too late for some of you so please let 
> me know what you think. Notice that the time won't change for 
> tomorrow's NRG.
> Cheers,
> Niky
> This paper considers the basic problem of "how accurate can we make 
> Internet performance measurements". The answer is somewhat 
> counterintuitive in that there are bounds on the accuracy of such 
> measurements, no matter how many probes we can use in a given time 
> interval, and thus arises a type of Heisenberg inequality describing 
> the bounds in our knowledge of the performance of a network. The 
> results stem from the fact that we cannot make independent 
> measurements of a system's performance: all such measures are 
> correlated, and these correlations reduce the efficacy of 
> measurements. The degree of correlation is also strongly dependent on 
> system load. The result has important practical implications that 
> reach beyond the design of Internet measurements, into the design of 
> network protocols.
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