Re: [tcmtf] Traffic classification approach for tcmtf (Draft B)

FERNANDO PASCUAL BLANCO <fpb@tid.es> Tue, 26 February 2013 13:44 UTC

Date: Tue, 26 Feb 2013 13:44:03 +0000
From: FERNANDO PASCUAL BLANCO <fpb@tid.es>
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Subject: Re: [tcmtf] Traffic classification approach for tcmtf (Draft B)
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Hi all,

Regarding the classification approach: I think your approach is valid, nevertheless I would add the following assumption. Imagine the following scenario:

  *   Imagine you have 3 different priorities: A (with the lower multiplexing period) to C (with the higher multiplexing period)
  *   Imagine you have 2 flows: one flow A with priority A and another flow C with priority C
  *   Flow A goes into the priority A, but there is still room in that queue for more flows (flow A does not fill big packets).

Should we apply priority C to flow C? Or should we apply priority A? We have to take into account that the more flows to be multiplexed, the better the TCMTF works. In that case, mixing flows A and C in priority A helps the algorithm to work better and improve the RTT of both flows. Nevertheless, we should only apply that assumption when the highest priority is NOT full of flows, let´s say.

What do you think?

Regards,

Fernando Pascual Blanco
Telefónica Global Resources
Network Automation and Dynamization
TECHNOLOGY PEOPLE GROUP
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From: Mirko Sužnjević <Mirko.Suznjevic@fer.hr<mailto:Mirko.Suznjevic@fer.hr>>
Date: jueves, 21 de febrero de 2013 11:48
To: "tcmtf@ietf.org<mailto:tcmtf@ietf.org>" <tcmtf@ietf.org<mailto:tcmtf@ietf.org>>
Cc: "'Michael Ramalho (mramalho) '" <mramalho@cisco.com<mailto:mramalho@cisco.com>>
Subject: [tcmtf] Traffic classification approach for tcmtf (Draft B)

Hello everybody,
I have been surveying the literature of traffic classification approaches and I need an advice for the next version of draft B. The question is regarding a "suitable" traffic classification algorithm. What should we aim at? Speed or extra accuracy?
I have been thinking about it and I propose a following solution:

1)      Each new traffic flow observed is labeled "highest" priority (shortest multiplexing period) until we classify it. The time spent in this state might get rather long for the flows with low sending rate.

2)      Once classified and then assign it to an appropriate priority (i.e., multiplexing period)?


Also I have a question regarding sampling rate. Do you think it is possible that we will have complete samples of traffic or just partial for the classification? Because on very high speed links it is very hard to obtain all of the traffic for classification.

Cheers!
Mirko Suznjevic


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[tcmtf] Traffic classification approach for tcmtf… Mirko Sužnjević
Re: [tcmtf] Traffic classification approach for t… FERNANDO PASCUAL BLANCO
Re: [tcmtf] Traffic classification approach for t… Michael Ramalho (mramalho)
Re: [tcmtf] Traffic classification approach for t… Mirko Sužnjević
Re: [tcmtf] Traffic classification approach for t… FERNANDO PASCUAL BLANCO