LARTC - Sep 2002 - HTB and per-connection bandwidth allocation

Hi,
 
How do I allocate a guaranteed rate to each individual connection.
For example I can allocate, say 1Mb, to all HTTP traffic by defining the
appropriate class & filter. In this case, if I have one connection it will
get all 1M; if I have 100 then each connection will get ~ 10k. But supposing
I want to allocate 10k per individual connection regardless of the number of
connections - so if I have only one connection it gets 10k...20 get 20*10k
and if I go above 100 any extra connections are dropped. This allows a
guaranteed level of service per connection.
I cannot see how to achieve this in HTB.
 
Thanks
Michael

hi!

imho there''s an iplimit-patch (at patchomatic) - you should be able to
limit the numer of connections to 100 with this...

just a guess
		Sebastian

-- 
Sebastian ''spax'' Pape          | Better to remain silent and
be thought a fool
mailto: sebastian@p-a-p-e.de   | than to speak and remove all doubt.
gpg: http://p-a-p-e.de/gpg.asc |
         --- Do you want to know more? http://www.p-a-p-e.de/ ---

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try SFQ.
devik

On Mon, 9 Sep 2002, Michael O''Shea wrote:
> Hi,
>
> How do I allocate a guaranteed rate to each individual connection.
> For example I can allocate, say 1Mb, to all HTTP traffic by defining the
> appropriate class & filter. In this case, if I have one connection it
will
> get all 1M; if I have 100 then each connection will get ~ 10k. But
supposing
> I want to allocate 10k per individual connection regardless of the number
of
> connections - so if I have only one connection it gets 10k...20 get 20*10k
> and if I go above 100 any extra connections are dropped. This allows a
> guaranteed level of service per connection.
> I cannot see how to achieve this in HTB.
>
> Thanks
> Michael
>
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Ahh yes .. so that maximum N is fixed in this way ? Hmmm
and you then need way to map active connection to free
class in HTB for example. It will not be simple because
you can''t say when conversation ends (safely). So that you
will end with all classes busy.

You would have to write it yourself probably - extend iptables
connection tracking to maintain table of classids and select
classid for new connection and return it when conn is deleted.
Then simply copy this number to fwmark ...

If you really need this and can''t write it you could ask
in lartc list whether someone is willing to write it (for
fun or for money).
devik

On Tue, 10 Sep 2002, Michael O''Shea wrote:
> devik,
> But this is my problem - I don''t want bw per connection = total/n
... I want
> bw per connection = x, where x is a constant fraction of total. So for n
> connections total bw utilised = n*x <= total.
> rgds, Michael
>
> -----Original Message-----
> From: devik [mailto:devik@cdi.cz]
> Sent: 09 September 2002 19:53
> To: Michael O''Shea
> Subject: RE: [LARTC] HTB and per-connection bandwidth allocation
>
>
> for n active (backlogged) connection sfq gives
> total/n fraction. existence of backlog is
> essential ! chech with tc class show whether
> htb leaf is backloged during periods you
> are interested in.
> devik
>
> On Mon, 9 Sep 2002, Michael O''Shea wrote:
>
> > devik,
> >
> > I''ve tried adding sfq qdiscs to the class that governs HTTP
but I still
> > don''t get the result I want. If I open a single connection,
it still gets
> > all the bandwidth available for the class. My understanding is that
the
> > addition of sfq to a class will allow fairness between the individual
> > connections (giving each a ''turn'') .. but this does
not help with defining
> a
> > specific rate per connection?
> >
> >
> > Michael
> >
> > -----Original Message-----
> > From: Martin Devera [mailto:devik@cdi.cz]
> > Sent: 09 September 2002 17:52
> > To: Michael O''Shea
> > Cc: ''lartc@mailman.ds9a.nl''
> > Subject: Re: [LARTC] HTB and per-connection bandwidth allocation
> >
> >
> > try SFQ.
> > devik
> >
> > On Mon, 9 Sep 2002, Michael O''Shea wrote:
> >
> > > Hi,
> > >
> > > How do I allocate a guaranteed rate to each individual
connection.
> > > For example I can allocate, say 1Mb, to all HTTP traffic by
defining the
> > > appropriate class & filter. In this case, if I have one
connection it
> will
> > > get all 1M; if I have 100 then each connection will get ~ 10k.
But
> > supposing
> > > I want to allocate 10k per individual connection regardless of
the
> number
> > of
> > > connections - so if I have only one connection it gets 10k...20
get
> 20*10k
> > > and if I go above 100 any extra connections are dropped. This
allows a
> > > guaranteed level of service per connection.
> > > I cannot see how to achieve this in HTB.
> > >
> > > Thanks
> > > Michael
> > >
> >
> >
>
>
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Devik,
Thanks for that...now I have to do some thinking..
Rgds
Michael

-----Original Message-----
From: devik [mailto:devik@cdi.cz]
Sent: 10 September 2002 10:25
To: Michael O''Shea
Cc: lartc@mailman.ds9a.nl
Subject: RE: [LARTC] HTB and per-connection bandwidth allocation


Ahh yes .. so that maximum N is fixed in this way ? Hmmm
and you then need way to map active connection to free
class in HTB for example. It will not be simple because
you can''t say when conversation ends (safely). So that you
will end with all classes busy.

You would have to write it yourself probably - extend iptables
connection tracking to maintain table of classids and select
classid for new connection and return it when conn is deleted.
Then simply copy this number to fwmark ...

If you really need this and can''t write it you could ask
in lartc list whether someone is willing to write it (for
fun or for money).
devik

On Tue, 10 Sep 2002, Michael O''Shea wrote:
> devik,
> But this is my problem - I don''t want bw per connection = total/n
... I
want
> bw per connection = x, where x is a constant fraction of total. So for n
> connections total bw utilised = n*x <= total.
> rgds, Michael
>
> -----Original Message-----
> From: devik [mailto:devik@cdi.cz]
> Sent: 09 September 2002 19:53
> To: Michael O''Shea
> Subject: RE: [LARTC] HTB and per-connection bandwidth allocation
>
>
> for n active (backlogged) connection sfq gives
> total/n fraction. existence of backlog is
> essential ! chech with tc class show whether
> htb leaf is backloged during periods you
> are interested in.
> devik
>
> On Mon, 9 Sep 2002, Michael O''Shea wrote:
>
> > devik,
> >
> > I''ve tried adding sfq qdiscs to the class that governs HTTP
but I still
> > don''t get the result I want. If I open a single connection,
it still
gets
> > all the bandwidth available for the class. My understanding is that
the
> > addition of sfq to a class will allow fairness between the individual
> > connections (giving each a ''turn'') .. but this does
not help with
defining
> a
> > specific rate per connection?
> >
> >
> > Michael
> >
> > -----Original Message-----
> > From: Martin Devera [mailto:devik@cdi.cz]
> > Sent: 09 September 2002 17:52
> > To: Michael O''Shea
> > Cc: ''lartc@mailman.ds9a.nl''
> > Subject: Re: [LARTC] HTB and per-connection bandwidth allocation
> >
> >
> > try SFQ.
> > devik
> >
> > On Mon, 9 Sep 2002, Michael O''Shea wrote:
> >
> > > Hi,
> > >
> > > How do I allocate a guaranteed rate to each individual
connection.
> > > For example I can allocate, say 1Mb, to all HTTP traffic by
defining
the
> > > appropriate class & filter. In this case, if I have one
connection it
> will
> > > get all 1M; if I have 100 then each connection will get ~ 10k.
But
> > supposing
> > > I want to allocate 10k per individual connection regardless of
the
> number
> > of
> > > connections - so if I have only one connection it gets 10k...20
get
> 20*10k
> > > and if I go above 100 any extra connections are dropped. This
allows a
> > > guaranteed level of service per connection.
> > > I cannot see how to achieve this in HTB.
> > >
> > > Thanks
> > > Michael
> > >
> >
> >
>
>
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