[LARTC] 95th percentile billing

[LARTC] 95th percentile billing

[Will Tatam]

I am just in the process of swapping ip transit supplier and my new 
supplier is providing an open 100Mb/s connection but billing me on the 
basis of using less than 1Mb/s for 95% of the time

What would be the ideal for me would be setting up my box so that it 
always complied with this.

i.e i want to limit my own connection speed to 1Mb/s but have a suitably 
large bit bucket so that i can burst higher for short periods
The ideal would be a setup where the average speed cap worked out over 
serveral hours. If this were not possible even a few seconds of burst 
would help given that most of the files being downloaded from the 
webserver are only a few k

Is something along these lines possible or have i miss understood the 
documentation

-- 

Will Tatam
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Re: [LARTC] 95th percentile billing

[Roy]

You have good provider,
this is very usefull, because you can manage your trafic very efectively.
it is esay to limit trafic, to 1mbit, but you can set cburst to some very
large nunber like 3-10 mb

also you can do mere complex rules, if you luke by clasifying trafic by port
or better use connbytes to manage trafic by filesize,
I am using such script on my much slower connection
together with imq
http://pupa.da.ru/imq



----- Original Message ----- 
From: "Will Tatam" <will@netmindz.net>
To: <lartc@mailman.ds9a.nl>
Sent: Thursday, February 19, 2004 12:53 PM
Subject: [LARTC] 95th percentile billing


> I am just in the process of swapping ip transit supplier and my
> new
> supplier is providing an open 100Mb/s connection but billing me on the
> basis of using less than 1Mb/s for 95% of the time
>
> What would be the ideal for me would be setting up my box so that it
> always complied with this.
>
> i.e i want to limit my own connection speed to 1Mb/s but have a suitably
> large bit bucket so that i can burst higher for short periods
> The ideal would be a setup where the average speed cap worked out over
> serveral hours. If this were not possible even a few seconds of burst
> would help given that most of the files being downloaded from the
> webserver are only a few k
>
> Is something along these lines possible or have i miss understood the
> documentation
>
> -- 
>
> Will Tatam
> ------------------------------------------------------------
> Email / JID will@netmindz.net
> Web www.netmindz.net
> PGP Key www.netmindz.net/will/will_tatam.asc
> ------------------------------------------------------------
> Registered Linux user 294695
> Linux Counter http://counter.li.org
> ------------------------------------------------------------
> See http://www.jabber.org/ to find out
> more about the most
>  advanced cross platform, open source enterprise messaging
>                           solution
> ------------------------------------------------------------
>
>
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>

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Re: [LARTC] 95th percentile billing

[Stef Coene]

On Saturday 21 February 2004 02:41, Roy wrote:
> You have good provider,
> this is very usefull, because you can manage your trafic very efectively.
> it is esay to limit trafic, to 1mbit, but you can set cburst to some very
> large nunber like 3-10 mb
That's not such a good idea.  burst/cburst is for small burst.  
If you use the configured cburst (so you send more packets then the ceil), you 
have to wait some time to be able to reuse the cburst.  The bucket with 
ctokens has to rebuild and this can only if you use less bandwidth then the 
ceil.

Stef

-- 
stef.coene@docum.org
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Re: [LARTC] 95th percentile billing

[Will Tatam]

Stef Coene wrote:

>On Saturday 21 February 2004 02:41, Roy wrote:
>  
>
>>You have good provider,
>>this is very usefull, because you can manage your trafic very efectively.
>>it is esay to limit trafic, to 1mbit, but you can set cburst to some very
>>large nunber like 3-10 mb
>>    
>>
>That's not such a good idea.  burst/cburst is for small burst.  
>If you use the configured cburst (so you send more packets then the ceil), you 
>have to wait some time to be able to reuse the cburst.  The bucket with 
>ctokens has to rebuild and this can only if you use less bandwidth then the 
>ceil.
>
>Stef
>
>  
>
How do cable modems limit ?

Here in tne uk you downloads always seam to start at wirespeed and then 
drop to the speed your paying

Can anyone who is on a burstable connection provide any example of how 
they allow busting for short periods

-- 

Will Tatam
------------------------------------------------------------
Email / JID	will@netmindz.net
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 advanced cross platform, open source enterprise messaging 
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Re: [LARTC] 95th percentile billing

[rubens]

> How do cable modems limit ?

That's a design decision. One network might choose the DOCSIS way and
program the cable-modems to do the limiting, other network might prefer
keeping the cable modem at highest speed possible and limit the speed in
a B-RAS, a broadband aggregation router (usually a big/expensive hardware
from Cisco, Juniper or RedBack).

> Here in tne uk you downloads always seam to start at wirespeed and then
> drop to the speed your paying

All shaping mechanisms will perform like this at some time scale. If it's
on sub-second window you probably won't notice.

> Can anyone who is on a burstable connection provide any example of how
> they allow busting for short periods

The trick here will be tuning your burst time/rate/bytes to match the
service provider in order to get the most of your connection. But that
would usually apply to ingress shaping; for a cable/xDSL connection, I
prefer limiting only on egress.


Rubens


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