[LARTC] Eureka!

[LARTC] Eureka!

[Ricardo Jorge da Fonseca Marques Ferreira]

I finally figured out what in emule was ruining my network. 

I tried everything and nothing worked. I was always getting timeouts. Until i 
went into the extended settings in emule and changed connections per 5 
seconds to 5 from the default of 20. Miracle. It now works great.

So apparently lots of connection attempts in a few seconds is an effective way 
of starving all other machines behind a linux gateway even if you're using 
SFQ.
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Re: [LARTC] Eureka!

[Stef Coene]

On Monday 28 April 2003 00:20, Ricardo Jorge da Fonseca Marques Ferreira 
wrote:
> I finally figured out what in emule was ruining my network.
>
> I tried everything and nothing worked. I was always getting timeouts. Until
> i went into the extended settings in emule and changed connections per 5
> seconds to 5 from the default of 20. Miracle. It now works great.
>
> So apparently lots of connection attempts in a few seconds is an effective
> way of starving all other machines behind a linux gateway even if you're
> using SFQ.
Mhh.  I wonder how this can be.  Some tcp connection specialists out here?
Is it so that after a long time the connections are fair distributed or is 
there always a starvation of the other connections?

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

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Re: [LARTC] Eureka!

[John Bäckstrand]

> On Monday 28 April 2003 00:20, Ricardo Jorge da
Fonseca Marques Ferreira
> wrote:
> > I finally figured out what in emule was ruining my
network.
> >
> > I tried everything and nothing worked. I was always
getting timeouts. Until
> > i went into the extended settings in emule and
changed connections per 5
> > seconds to 5 from the default of 20. Miracle. It
now works great.
> >
> > So apparently lots of connection attempts in a few
seconds is an effective
> > way of starving all other machines behind a linux
gateway even if you're
> > using SFQ.
> Mhh.  I wonder how this can be.  Some tcp connection
specialists out here?
> Is it so that after a long time the connections are
fair distributed or is
> there always a starvation of the other connections?
>
> Stef

It could be because SFQ only equalizes flows. If you
open lots of connections then, it means every
connection will get worse. If this is the problem, this
will not happen with ESFQ, afaik.

---
John Bäckstrand


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Re: [LARTC] Eureka!

[Ricardo Jorge da Fonseca Marques Ferreira]

On Monday 28 April 2003 20:28, Stef Coene wrote:
> On Monday 28 April 2003 00:20, Ricardo Jorge da Fonseca Marques Ferreira
>
> wrote:
> > I finally figured out what in emule was ruining my network.
> >
> > I tried everything and nothing worked. I was always getting timeouts.
> > Until i went into the extended settings in emule and changed connections
> > per 5 seconds to 5 from the default of 20. Miracle. It now works great.
> >
> > So apparently lots of connection attempts in a few seconds is an
> > effective way of starving all other machines behind a linux gateway even
> > if you're using SFQ.
>
> Mhh.  I wonder how this can be.  Some tcp connection specialists out here?
> Is it so that after a long time the connections are fair distributed or is
> there always a starvation of the other connections?

In my experience the connections never get fairly distributed. I can reproduce 
this just increasing the number of connections per 5 seconds to 20 again. The 
effect is imediate.

I get connection timeouts in HTTP (more apparent, i'm sure other protocols 
suffer too) and have to reload a series of times before the connection "goes" 
and even then it then fails for some other elements in the page.
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Re: [LARTC] Eureka!

[Ricardo Jorge da Fonseca Marques Ferreira]

On Monday 28 April 2003 21:06, John Bäckstrand wrote:
> It could be because SFQ only equalizes flows. If you
> open lots of connections then, it means every
> connection will get worse. If this is the problem, this
> will not happen with ESFQ, afaik.

Hmm, is there any info on the web about ESFQ & can it be used with tcng which 
is what i'm using now to generate my tc scripts ?
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