Re: [LARTC] r2q

["Roy" <roy@xxx.lt>]

I newer saw warning mesage about quantum too big.
but probably it is ok to have ANY quantum which is greater than mtu.

probabaly you shpuld not set quantum to 1500 if it is 50000 by defaul,
unless you want to lower that class priority very much.

but so high quantums can make trafic very bursty.
so you may set that quantum to 15000 for better result.

this will make these classes priority proportion as 1 to 10 ( 1 packet of
spare trafic for slow class to 10 packets for fast class)

----- Original Message ----- 
From: "ThE LinuX_KiD" <gregoriandres@yahoo.com.ar>
To: "lartc" <lartc@mailman.ds9a.nl>
Cc: "Roy" <roy@xxx.lt>
Sent: Monday, March 22, 2004 8:50 PM
Subject: RE: [LARTC] r2q


>
> Thank you, Roy !
>
> I've setted quantum to 1500 when:
>
> quantum = rate / r2q < 1500
>
> and error logs are stopped.
>
> In other hand, I get a new warning message:
>
> '"'HTB: quantum of class .... is BIG. Consider r2q change'"'
>
> because, some rates are about 1500kbits, then with
> above formula quantum is about 192000 > 60000
>
> But, I can't change r2q, then I put '"'quantum 55000'"'
> on this rules, and error has been fixed.
>
> Is correct the value '"'quantum 55000'"' ?
> Or I must put mtu (1500) value for quantum ?
>
> Thank you!
>
> Andres.
>
>
>
>
>
>
>
>
> ->
> ->
> -> No,
> -> leave mtu unchanged, or you risk to have problems with some dumb
servers.
> -> just set qantum to 1500, for each rule when it is lower than mtu
> -> bu default
> ->
> -> (quantum = rate (bytes) / r2q) this formula is used by tc to calculate
> -> default quantum
> -> you do not need to use it.
> ->
> ->
> -> ----- Original Message -----
> -> From: '"'ThE LinuX_KiD'"' <gregoriandres@yahoo.com.ar>
> -> To: '"'lartc'"' <lartc@mailman.ds9a.nl>
> -> Sent: Saturday, March 20, 2004 10:17 PM
> -> Subject: RE: [LARTC] r2q
> ->
> ->
> -> >
> -> >
> -> >
> -> >
> -> > Rate=8 Kbits/s = 1 Kbyte/s = 1024 Bytes
> -> > r2q=1
> -> >
> -> > quantum = 1024/1.
> -> >
> -> > Then Quantum = 1024
> -> >
> -> > But MTU\x1500    =>  MTU > Quantum
> -> >
> -> > Must I set MTU to 1024 ????
> -> >
> -> > Thank you!
> -> >
> -> > Andres.
> -> >
> -> >
> -> >
> -> > -> Simply set quantum manualy,
> -> > -> now quantum = rate / r2q
> -> > -> set quantum to one mtu ( 1500 bytes)
> -> > ->
> -> > -> Remember that quantum affects priority
> -> > -> bigger quantum means higer priority.
> -> > ->
> -> > ->
> -> > -> ----- Original Message -----
> -> > -> From: ''"''ThE LinuX_KiD''"'' <gregoriandres@yahoo.com.ar>
> -> > -> To: ''"''lartc''"'' <lartc@mailman.ds9a.nl>
> -> > -> Sent: Friday, March 19, 2004 11:20 PM
> -> > -> Subject: [LARTC] r2q
> -> > ->
> -> > ->
> -> > -> > Hi...
> -> > -> >
> -> > -> > I'm working with HTB, and have a question...
> -> > -> >
> -> > -> > what happen if I create a class of '''"'''8kbit'''"''' ??
> -> > -> >
> -> > -> > I get a log :
> -> > -> >
> -> > -> > '''"'''HTB: quantum of class .... is small. Consider r2q
> change'''"'''
> -> > -> >
> -> > -> > but, my r2q=1  I can't reduce that variable...
> -> > -> >
> -> > -> > how must I procced ?
> -> > -> >
> -> > -> > Thank you!
> -> > -> > mac
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>
>

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