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Date: Fri, 30 Aug 2002 17:26:19 +0200
From: Jakob Breivik Grimstveit
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To: blug@blug.linux.no
Subject: [BLUG] Struping av bandbreidde
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Korleis kan eg få eitkvart program (eller eit heilt network interface) til å
bli strupa i bandbreidde?
Eg vil nemleg laste ned rundt ein gigabyte frå ein server via scp, men vil
ikkje at dei andre viktige nett-tjenestene på den maskina skal lide på grunn
av det.
Det må då finnast noko fornuftig program som kan fikse det? Eller finnast det
allereie på ein SuSE8-distro, kanskje?
På førehand takk.
--
Vyrdsamt...
Jakob Breivik Grimstveit, jakob@grimstveit.no, www.grimstveit.net/jakob/
Morvikbotn 341, 5122 Morvik. Heim: +47 55195667, mob: +47 48298152
Some days you're the windshield, some days the bug.
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From: Oddbjorn Steffensen
To: Jakob Breivik Grimstveit
Cc: blug@blug.linux.no
Subject: Re: [BLUG] Struping av bandbreidde
Message-ID: <20020830195422.GA62141@tricknology.org>
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On Fri, Aug 30, 2002 at 05:26:19PM +0200, Jakob Breivik Grimstveit wrote:
> Eg vil nemleg laste ned rundt ein gigabyte frå ein server via scp, men vil
> ikkje at dei andre viktige nett-tjenestene på den maskina skal lide på grunn
> av det.
KISS-varianten av dette er --bwlimit-opsjonen til rsync (som du
tunnellerer over ssh-forbindelsen som du ellers ville brukt scp
til).
-oddbjørn
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From: "ketil V."
To: blug@blug.linux.no
Subject: Re: [BLUG] Struping av bandbreidde
Date: Thu, 29 Aug 2002 17:38:08 -0100
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On Friday 30 August 2002 14:26, Jakob Breivik Grimstveit wrote:
}Korleis kan eg få eitkvart program (eller eit heilt network interface) til
} å bli strupa i bandbreidde?
Har du lest Bandwidth - limiting - HOWTO?
- --
Peace, n.:
In international affairs, a period of cheating between two
periods of fighting.
-- Ambrose Bierce, "The Devil's Dictionary"
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From: =?iso-8859-15?q?Bj=F8rn=20Even=20Wahlstr=F8m?=
To: blug@blug.linux.no
Subject: Re: [BLUG] Struping av bandbreidde
Date: Fri, 30 Aug 2002 18:47:35 +0200
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On Thursday 29 August 2002 20:38, ketil V. wrote:
> On Friday 30 August 2002 14:26, Jakob Breivik Grimstveit wrote:
> }Korleis kan eg få eitkvart program (eller eit heilt network interface)
> til } å bli strupa i bandbreidde?
>
> Har du lest Bandwidth - limiting - HOWTO?
Eller hva med Advanced Routing Howto
Saken går rett og slett ut på å bruke forskjellige måter å telle og begrense
pakker på
Iproute2 (med i de fleste sensible distroer) har programmet "tc".
TrafficController. Den kan en spesifisere forskjellige algoritmer for
pakkebegrensning.
Eksempel er CBQ, HTB (bare i linux 2.5 foreløpig), WRR m.fl
CBQ finnes det et script kallt CBQ.init som konfigurerer for deg. CBQ er
forresten gammelt, unøyaktig og pain-in-the-ass å konfigurere.
HTB er mye enklere.
En kan også angripe problemet på en annen måte. En kan sette opp 3 køer
allerede eksisterende (men ubrukt) i linux ipstack. Disse leser TOS (Type of
Service) header i IP pakken, og gir pakken preferanser over de andre, etter
hva programmene selv vil. En FTP, SCP e.l transfer spør etter liten
prioritet, og vil dermed falle bak i køen dersom båndbredde-bruken er stor.
F.eks vil dette gjøre at interaktiv trafikk kommer foran FTP transfer (LAG
vil da være liten). Man kan også bruke iptables til å sette TOS headers slik
at din bruk vil _alltid_ komme nederst i køen.
Vær obs på at dette er nokså tungt stoff dersom du ikke har vært borti routing
før (selv CBQ.init krever sitt)
bjørn even wahlstrøm
Norwegian Linux Community
friByte