From owner-freebsd-hackers  Fri Jul 13 15:37:54 2001
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From: David Gilbert <dgilbert@velocet.ca>
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Date: Fri, 13 Jul 2001 18:37:48 -0400
To: Matt Dillon <dillon@earth.backplane.com>
Cc: David Gilbert <dgilbert@velocet.ca>,
	Thierry Herbelot <thierry@herbelot.com>,
	Alfred Perlstein <bright@sneakerz.org>, hackers@FreeBSD.ORG
Subject: Re: Swapping in diskless ? (was :Re: [hackers] Re: getting rid of 
 sysinstall)
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>>>>> "Matt" == Matt Dillon <dillon@earth.backplane.com> writes:

Matt>     Right, you only need swap to be able to flush dirty pages.
Matt> Clean code (and even clean data) pages are simply dropped and
Matt> reloaded from the disk image later on if needed again.  With
Matt> careful program management you can run without swap.

Matt>     Also, do performance testing with dynamic-linked verses
Matt> static-linked binaries.  Static-linked binaries may look larger,
Matt> but they have a much lower dirty-page overhead then the
Matt> dynamically linked equivalent.  It depends on the situation but
Matt> it is definitely worth testing.

Is it not possible (or has nobody done it) to swap with the current
diskless boot?  Of all people, I would have expected Matt to be able
to help :).

I have quite a few systems netbooting using etherboot floppies
(incidentally running 3.4) ... and they use NFS swap just fine.  I
would really like the same thing with the PXE boot.

Is it possibly as simple as making pxeboot ignore the swap DHCP tag?
Does anyone here hack pxeboot?

Dave.

-- 
============================================================================
|David Gilbert, Velocet Communications.       | Two things can only be     |
|Mail:       dgilbert@velocet.net             |  equal if and only if they |
|http://www.velocet.net/~dgilbert             |   are precisely opposite.  |
=========================================================GLO================

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