Re: [Old frost] network bandwidth usage and QoS

----- mrogers@UU62+3E1vKT1k+7fR0Gx7ZN2IB0 ----- 2007.05.28 - 22:30:27GMT -----

Interesting - I wonder how quickly the running averages adapt.

On Wednesday 08 August 2007 15:56, Matthew Toseland wrote:
> ----- ET@mj+bSV4hxRMtCj9fcwy4Ww9_3mc ----- 2007.05.27 - 10:13:11GMT -----
>
> I think Stochastic Fairness Queuing (SFQ) algorithm is appropriate for
> freenet output.
>
> http://www.opalsoft.net/qos/DS-25.htm
>
> - equalize bandwidth between each actif node link
> - minimize delay on each link
> - adapt link usage when bandwidth change (due to QoS on network or saturate
> network)
>
> ----- Anonymous@o9_0DTuZniSf_+oDmRsonByWxsI ----- 2007.05.27 -
> 20:08:46GMT -----
>
> Node A and Node B connected:
> - Node A has bandwidth 1000 with 15 active connections
> - Node B has bandwidth 5000 with 8 active connections
>
> As result, node B feels ok to send to node A datastream with seemingly fair
> speed of 625, but from Node A standpoint the fair level would be 67.
>
> 10x difference. So unlikely a particular QoS algorithm will have noticeable
> impact on overall performance/fairness, there are much more critical
> bandwidth control tasks to optimize.
>
> (But it should be easy to check: SFQ among other algorithms is implemented
> in linux, so just configure host, raise fred outgoing bandwidth limit to
> the sky (and make sure fred has something extra to send - like large
> storage, and/and/or large inserts), and try to notice any difference,
> preferably expressed in numbers. I am serious, please report the results if
> any.)
>
> On the other hand, good QoS could be useful on a host/network with freenet
> node sharing relatively slow internet connection with other
> applications/users. Unfortunatelly for outgoing traffic only.
>
> ----- ET@mj+bSV4hxRMtCj9fcwy4Ww9_3mc ----- 2007.05.28 - 07:37:39GMT -----
>
> I use already QoS on my computer, HTB and SFQ for freenet. When freenet's
> bandwidth is reduce by QoS, bwlimitDelayTime and nodeAveragePingTime
> increase and reject requests (SUB_MAX_PING_TIME, MAX_PING_TIME and Output
> bandwidth liability). Problem is long time to take again normal activity,
> about 30 minutes after QoS give back bandwidth.

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