From owner-freebsd-current Mon Dec 10 23:59: 7 2001 Delivered-To: freebsd-current@freebsd.org Received: from monorchid.lemis.com (monorchid.lemis.com [192.109.197.75]) by hub.freebsd.org (Postfix) with ESMTP id 65C5537B405; Mon, 10 Dec 2001 23:58:59 -0800 (PST) Received: by monorchid.lemis.com (Postfix, from userid 1004) id EB8C9786E6; Tue, 11 Dec 2001 18:28:56 +1030 (CST) Date: Tue, 11 Dec 2001 18:28:56 +1030 From: Greg Lehey To: Terry Lambert Cc: Hiten Pandya , current@FreeBSD.org, hackers@FreeBSD.org Subject: Re: [SUGGESTION] - JFS for FreeBSD Message-ID: <20011211182856.A67986@monorchid.lemis.com> References: <20011210220153.50612.qmail@web21102.mail.yahoo.com> <3C15AB82.FDF598A8@mindspring.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3C15AB82.FDF598A8@mindspring.com> User-Agent: Mutt/1.3.23i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Monday, 10 December 2001 at 22:45:22 -0800, Terry Lambert wrote: > Hiten Pandya wrote: >> i wanted to ask if there were any _plans_ to port >> JFS (Journaled File System) to FreeBSD... > > Not unless you have plans. When I was an IBM employee, they would > not change the license, and so it's impossible to ship a CDROM > where it's the boot FS, or boxes on which it is the boot FS, and > still have it be legal, because of the license conflicts. > > I fought this for about a year within IBM, before I gave up. Since then, it has become possible for the loader to load modules before booting the kernel. This means that, theoretically, it would be possible to have a JFS root file system. Given the strong opposition to the GPL in some factions of the FreeBSD project, I don't see this happening any time soon, especially since we still don't know if it will buy us anything. >> It is used on IBM MainFrames and Enterprise servers >> for high performance and maximum throughput... > > No, it's not. The Linux JFS is derived from the OS/2 JFS code, not > the good AIX JFS code. That's correct, but note that AIX is moving to this code base too, so it's not as if it's second-rate. From what I've seen of the structures, JFS2 is *much* better than JFS1. I haven't compared performance. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message