From owner-freebsd-hackers Mon Feb 9 01:57:35 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id BAA29432 for hackers-outgoing; Mon, 9 Feb 1998 01:57:35 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from parkplace.cet.co.jp (parkplace.cet.co.jp [202.32.64.1]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id BAA29415; Mon, 9 Feb 1998 01:57:28 -0800 (PST) (envelope-from michaelh@cet.co.jp) Received: from localhost (michaelh@localhost) by parkplace.cet.co.jp (8.8.8/CET-v2.2) with SMTP id JAA02398; Mon, 9 Feb 1998 09:56:39 GMT Date: Mon, 9 Feb 1998 18:56:38 +0900 (JST) From: Michael Hancock To: "Alton, Matthew" cc: fs@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: Filesystem hacking In-Reply-To: <31B3F0BF1C40D11192A700805FD48BF9C33287@STLABCEXG011> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, 30 Jan 1998, Alton, Matthew wrote: > I have decided to code up an IBM-style journaling filesystem > (jfs) with maximum portability for free unices. While I'm at it Cool. Portability might be a challenge though, the vnode interface varies quite a bit between the various Unices. > I had might as well have the clean-bits map to a PP/extent > disk arrangement which will act as a useful abstraction for a > Logical Volume Manager / Veritas -esque disk management > system which I also find interesting enough to code up. > > This is not an attempt to morph FreeBSD into AIX by any > means. It is just an interesting project which I think may be > of use to hackers. > > This month (02/98) I will explore the GNU HURD OS to see if > their goal of creating an OS which would allow me to imple- > ment a filesystem in user space has been realized. If it has > not, I will use my normal FreeBSD 2.2.2 i386/40 and NetBSD > 1.3 Sun 3/50 & 3/80 development boxes. See the link below for a description of stacking, I was one of the people that was talking about doing ktou/utok layers in FBSD but I haven't gotten around to it yet. http://www.isi.edu/~johnh/SOFTWARE/UCLA_STACKING/ Doing a terminal layer in userland would be a pretty good challenge. While GNU HURD is interesting, for a production environment you should probably stick with doing most of it in the kernel. You might also want to look at the CryptoFS, I think it's in the ports tree, for an example of an FS that piggybacks on NFS. > Please let me know if I am duplicating effort and provide me > with relevant pointers. > P.S. it's good to see a FreeBSDer from AB. Any chance of converting Scott Smallie? ;-) -- michaelh@cet.co.jp http://www.cet.co.jp CET Inc., Daiichi Kasuya BLDG 8F, 2-5-12 Higashi Shinbashi, Minato-ku, Tokyo 105 Japan Tel: +81-3-3437-1761 Fax: +81-3-3437-1766 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe hackers" in the body of the message