Date: Tue, 22 Jul 1997 11:01:01 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: terry@lambert.org (Terry Lambert) Cc: abial@korin.warman.org.pl, freebsd-hackers@FreeBSD.ORG Subject: Re: Compressed FS Message-ID: <199707221801.LAA13642@phaeton.artisoft.com> In-Reply-To: <199707220018.RAA12149@phaeton.artisoft.com> from "Terry Lambert" at Jul 21, 97 05:18:27 pm
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Rereading this, it could have been confusing...
> > I'm reading the Heidemann's thesis right now (on stackable FS design). He
> > mentions that among others they implemented a compression layer. Did
> > anyone do something similar under FreeBSD? It would be cool to have it,
> > IMHO.
>
> John has sent the compression code (and some cryptographic code)
^^^^
John Heidemann
> layers to severa people, including myself, with the request that
> we not redistribute the code without prior permission.
>
> The BSD layering is such that the VM issues are, in some cases,
> hard to overcome (which is why union FS's currently don't work
> in the main line tree). Any compression (or cryptographic) FS
> would face similar problems, since it would need to maintain
> seperate cache data for the uncompressed (or deencrypted) file
> blocks.
>
> Actually, you should check with John: he was working on the
^^^^
John Dyson
> union FS code to make it work with the new VM.
Terry Lambert
terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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