[LARTC] fairness queing: sfq, etc.

[LARTC] fairness queing: sfq, etc.

[David Koski]

The documentation (2.4routing) seems to imply that SFQ balances on a per
connection basis.  It would seem to be more fair to balance on a source ip basis
as that would evenly divide bandwidth among users.  Is this correct?  If so, is
there an alternative qdisc that would provide the above?

Regards,
David Koski
david@KosmosIsland.com
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Re: [LARTC] fairness queing: sfq, etc.

[Patrick McHardy]

Hi !

David Koski schrieb:
> 
> The documentation (2.4routing) seems to imply that SFQ balances on a per
> connection basis.  It would seem to be more fair to balance on a source ip basis

SFQ places packets in slots based on a hash function. Then each slot is
dequeud in
a round-robin fashion.

> as that would evenly divide bandwidth among users.  Is this correct?  If so, is
> there an alternative qdisc that would provide the above?

I don't think there is a qdiscs for this but SFQ should be easy to
change.
Changing the hash function to something like iph->saddr %
SFQ_HASH_DIVISOR
should be enough ..

Bye,
Patrick
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Re: [LARTC] fairness queing: sfq, etc.

[Wojtek Sawasciuk]

On Wed, 10 Apr 2002, Patrick McHardy wrote:

> Hi !
> 
> David Koski schrieb:
> > 
> > The documentation (2.4routing) seems to imply that SFQ balances on a per
> > connection basis.  It would seem to be more fair to balance on a source ip basis
> 
> SFQ places packets in slots based on a hash function. Then each slot is
> dequeud in
> a round-robin fashion.
> 
> > as that would evenly divide bandwidth among users.  Is this correct?  If so, is
> > there an alternative qdisc that would provide the above?
> 
> I don't think there is a qdiscs for this but SFQ should be easy to
> change.

The WRR  (http://wipl-wrr.sourceforge.net/wrr.html) scheduler can do this job.




Wojtek Sawasciuk


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