Anurag Bhatia wrote:

I have been using Zenoss quite a bit. It does not shows exact real time stat of interface but close to real time + it has ton more options for

I remember someone here saying that real time monitoring gives you useless results, because if you make the time of measurement small enough the utilisation becomes 100%. Measurement of throughput is how many times this happens during a particular time interval. I hope I remembered right. Reminds me of http://en.wikipedia.org/wiki/Parmenides#The_Way_of_Truth "Moreover he argued that movement was impossible because it requires moving into "the void", and Parmenides identified "the void" with nothing, and therefore (by definition) it does not exist. That which does exist is The Parmenidean One, which is timeless, uniform, and unchanging" -- Earthquake Magnitude: 3.3 Date: Friday, May 4, 2012 05:16:08 UTC Location: Island of Hawaii, Hawaii Latitude: 19.4332; Longitude: -155.2877 Depth: 2.40 km

In a troubleshooting situation I think real time is valid. Off course, is non-sense doing this for "normal" monitoring... But firstly define: What's real-time? every second? miliseconds? 10 seconds? 30 seconds? It's subjective nowadays 2012/5/4 David Miller <dmiller@tiggee.com>

On 5/4/2012 6:53 PM, Jeroen van Aart wrote:

...

Anurag Bhatia wrote:

...

I have been using Zenoss quite a bit. It does not shows exact real time stat of interface but close to real time + it has ton more options for

I remember someone here saying that real time monitoring gives you useless results, because if you make the time of measurement small enough the utilisation becomes 100%. Measurement of throughput is how many times this happens during a particular time interval. I hope I remembered right.

I think you are referring to this thread - http://www.gossamer-threads.com/lists/nanog/users/149903

and in particular this quote: cjp at 0x1 wrote on Feb 16, 2012, 11:25am As sampling rate approaches zero, so will the "spikyness" of the graph--ultimately an interface is either sending a frame (*100*%) or it's not (0%).

-cjp

Utilisation doesn't "become 100%", instead measured utilisation will either be 100% or 0% at each interval.

-DMM

-- []'s Lívio Zanol Puppim

Try out Observium...simple install and integration with RANCID. ----- Original Message ----- From: "Jeroen van Aart" <jeroen@mompl.net> To: "NANOG list" <nanog@nanog.org> Sent: Saturday, May 5, 2012 12:18:34 AM Subject: Re: Network diagram app that shows realtime link utilizatin David Miller wrote:

I think you are referring to this thread - http://www.gossamer-threads.com/lists/nanog/users/149903

Utilisation doesn't "become 100%", instead measured utilisation will either be 100% or 0% at each interval.

Thanks, and yes that was what I was trying to say. :-) -- Earthquake Magnitude: 4.9 Date: Saturday, May 5, 2012 03:34:01 UTC Location: North Indian Ocean Latitude: 3.6480; Longitude: 86.7091 Depth: 12.70 km Notice to Recipient: Information contained in this message may be privileged, confidential and protected from disclosure. If you are not an intended recipient, it is strictly prohibited to use, disseminate or copy this communication. If you have received this in error, please reply to the sender and then delete the message.Thank you.