[Nrg-l] NRG tomorrow @2pm

Niky Riga inki at cs.bu.edu
Wed Jun 15 13:22:27 EDT 2005

Just a reminder that NRG will start in 30 minutes in the grad lab.


Niky Riga wrote:

> Hi,
> 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
> http://www.cs.bu.edu/groups/nrg/abstracts/sm05/6_15_vijay.pdf
> Cheers,
> niky
> 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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