Re: Per connection transfer rate matching

[Ray Leach <raymondl@knowledgefactory.co.za>]

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On Thu, 2004-02-05 at 00:31, Nuutti Kotivuori wrote:
> I have recently trying to find a solution to a QoS problem of sorts.
> 
> What I would wish to be able to do, is to mark a connection based on
> the data transfer rate in that connection. That is, to have some sort
> of a token bucket filter or rate estimator attached to a certain
> connection tracking connection - and to be able to use that in
> netfilter rules.
> 
> An example problem case is trivial. Let's assume we have an
> interactive transfer class, which has several interactive sessions
> where latency is tried to be kept to a minimum. Occasionally some
> interactive session might start transferring a lot of data - in which
> case it should be scheduled into the maximum throughput class,
> forgetting latency, until it doesn't transfer that much and it should
> be returned to the interactive class again.
> 
> The 'connbytes' match in the patch-o-matic matches on cumulative
> transfer amounts on a per connection basis. The 'limit' match matches
> packets on a simple token bucket implementation. Combining these two
> to something which matches bytes on a simple token bucket per
> connection would create the desired result.
> 
Could you not do it then by using two user defined chains, one for limit
match and one for connbytes?

> So, does such a thing exist already? If not, do other people see this
> as useful as I do? Or have I missed something crucial?
> 
> And finally, if it doesn't exist already, making such a module
> shouldn't be too hard - would anyone be willing to undertake such an
> ordeal?
> 
> -- Naked
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Raymond Leach <raymondl@knowledgefactory.co.za>
Network Support Specialist
http://www.knowledgefactory.co.za
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