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Date:      Sat, 27 Oct 2001 00:48:09 -0400 (EDT)
From:      Robert Watson <rwatson@FreeBSD.ORG>
To:        Luigi Rizzo <rizzo@aciri.org>
Cc:        Bosko Milekic <bmilekic@technokratis.com>, "Keiichi SHIMA / ?$BEg7D0l?(B" <keiichi@iij.ad.jp>, David Malone <dwmalone@maths.tcd.ie>, Alfred Perlstein <bright@mu.org>, net@FreeBSD.ORG
Subject:   Re: performance issues with M_PREPEND on clusters
Message-ID:  <Pine.NEB.3.96L.1011027004609.410B-100000@fledge.watson.org>
In-Reply-To: <20011026092840.F64631@iguana.aciri.org>

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On Fri, 26 Oct 2001, Luigi Rizzo wrote:

...
> documentation will likely see this behaviour documented.  Changing it
> might introduce insidious bugs in the code -- because in reality,
> clusters are almost never shared except for those on the TCP send queue
> and for multicast packets (but who uses multicast, anyways), so there is
> a chance that we will have buggy code that goes unnoticed for a long
> time. 
...

I use multicast on my workstation pretty much every day.  While my own box
isn't a multicast router, we have several FreeBSD boxes deployed as
multicast routers at NAI Labs that are also used daily.  Sure is a lot
cheaper than the commercial video-conferencing services, and as long as
you use telephone conferencing for the audio, it even sounds good too :-).
No comment on the technical work going on here intended, just wanted to
observe that people actually do use multicast :-).

Robert N M Watson             FreeBSD Core Team, TrustedBSD Project
robert@fledge.watson.org      NAI Labs, Safeport Network Services



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