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Date:      Thu, 01 Aug 2002 11:08:42 +0200 (MEST)
From:      porte10@free.fr
To:        freebsd-questions@freebsd.org
Subject:   RAM-only systems
Message-ID:  <1028192922.3d48fa9aa8aad@imp.free.fr>

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Hi,

Is there a doc detailing how to tweak FreeBSD in order to
have it operate in RAM only (run on a box without hard disks) ?

I am pretty sure many readers are interested in how to run
such "boxes" that can be used as highperf firewalls/routers
or NIDS.

This implies that a lightened file directory burnt on a media
(CD-ROM) is loaded in memory at boot time.
Which filesystems are available then to store files in a
RAM disk ? swapfs ? But then how can one prevent this extra
"swapfs" from being used for its usual purpose ... swap
so that it is reserved for file storage at user-level ?

I may be mixing things a bit as i don't know about kernel
internals (is there a "freebsd kernel design guide" available
on-line ?), but i would be pleased to get an answer.

Regards
Phil

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