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Date:      Mon, 26 Jul 1999 13:53:00 -0500 (CDT)
From:      Mohit Aron <aron@cs.rice.edu>
To:        luigi@labinfo.iet.unipi.it (Luigi Rizzo)
Cc:        freebsd-net@freebsd.org, druschel@cs.rice.edu
Subject:   Re: FreeBSD tuning for webserver performance
Message-ID:  <199907261853.NAA28030@cs.rice.edu>
In-Reply-To: <199907261504.RAA00474@labinfo.iet.unipi.it> from "Luigi Rizzo" at Jul 26, 99 05:04:00 pm

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> 
> usually backbone routers have (or try, or ought to) some active
> queue management techniques such as RED or fair queueing variants
> so that per-flow queues are kept short. Try to flood-ping some site
> behind a bottleneck while you run a regular ping to the same site
> with a separate connection, and you'll see that in many cases the
> delay does not increase a lot -- you can even compute the queue
> size with this technique using different packet sizes.
> 


Very interesting. I thought that the deployment of intelligent techniques like
RED and fair queuing was still rather thin in Internet routers. My impression
was that most still do the naive FIFO queuing.



- Mohit


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