Re: Not hitting rated speed on HTB downstream

Linux Advanced Routing and Traffic Control

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For HFSC, I think this is a good read. I'll also try to implement it to test the throughput on my current set up.

http://linux-ip.net/articles/hfsc.en/

Horace Ng
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Internet Solutions Limited
E-mail: horace@xxxxxxxxx
Tel: +852 27109880
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----- Original Message -----
From: "Wolfgang Hennerbichler" <wogri@xxxxxxxxx>
To: "Mike Schmidt" <mike.schmidt@xxxxxxxxxxx>
Cc: lartc@xxxxxxxxxxxxxxx
Sent: Wednesday, August 14, 2013 4:33:24 AM
Subject: Re: Not hitting rated speed on HTB downstream


-- 
http://www.wogri.at

On Aug 13, 2013, at 22:25 , Mike Schmidt <mike.schmidt@xxxxxxxxxxx> wrote:

> On Tue, Aug 13, 2013 at 3:04 PM, Wolfgang Hennerbichler <wogri@xxxxxxxxx> wrote:
>> On Aug 13, 2013, at 17:57 , Remy Mudingay <remy.mudingay@xxxxxxxxx> wrote:
>> 
>>> Hi,
>>> 
>>> Firstly I'd change classid's rate so that the sum rate of all 1:1 child classes are not greater than its rate value. This is applicable to your default class 1:4.
>> 
>> This is a question I had on my mind for a long time: what if I want to oversubscribe (a lot of) clients? Will this cause any troubles? Why do you recommend doing this?
>> 
>> Wolfgang--
> 
> Generally, if you oversubscribe the children (i.e. sum(rates of
> children)  > rate of parent class) in htb, you basically kill the
> bandwidth management of the parent, since it can no longer manage the
> children's throughput. I personally set all the children to a low
> value for rate, but give them a high ceiling, this way the parent has
> a lot of flexibility. Don't forget that the 'rate' in htb is
> essentially a guaranteed throughput. However, I find HFSC more
> flexible, although somewhat harder to understand.

finding proper HFSC doc is a problem for me…
thanks for clarifying.

> -- 
> Mike SCHMIDT
> CTO
> Intello Technologies Inc.
> mike.schmidt@xxxxxxxxxxx
> Canada: 1-888-404-6261 x320
> USA: 1-888-404-6268 x320
> Mobile: 514-409-6898
> www.intello.com

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