From owner-freebsd-hackers Thu Apr 8 19:27:47 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (Postfix) with ESMTP id DDFE2155FC for ; Thu, 8 Apr 1999 19:27:41 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id LAA23431; Fri, 9 Apr 1999 11:55:40 +0930 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.3/8.9.0) id LAA24346; Fri, 9 Apr 1999 11:55:40 +0930 (CST) Message-ID: <19990409115540.G2142@lemis.com> Date: Fri, 9 Apr 1999 11:55:40 +0930 From: Greg Lehey To: Brian Feldman , Alfred Perlstein Cc: Remy Nonnenmacher , hackers@FreeBSD.ORG Subject: Re: Volume managers (was: Separate boot partition?) References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.93.2i In-Reply-To: ; from Brian Feldman on Thu, Apr 08, 1999 at 02:05:16PM -0400 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thursday, 8 April 1999 at 14:05:16 -0400, Brian Feldman wrote: > On Thu, 8 Apr 1999, Alfred Perlstein wrote: >> On Thu, 8 Apr 1999, Remy Nonnenmacher wrote: >>> On 8 Apr, Greg Lehey wrote: >>>> On Thursday, 8 April 1999 at 8:52:24 +0100, Dom Mitchell wrote: >>>>> On 8 April 1999, Greg Lehey proclaimed: >>>>>> I can't see why not, since it's possible now. What we still need to >>>>>> do is find a way to extend a file system, but that's a ufs issue >>>>>> (which has a solution), not a volume manager issue. >>>>> >>>>> What about shrinking an fs? Is that feasible? Possible? >>>> >>>> According to Kirk McKusick, no. >>>> >>> too bad !! >>> >>> Really, merging the best of all worlds (AIX PV migration, fs 'live' >>> extendability) *AND* fs shrinking would be a really impressive >>> performance. >>> >>> Think about it : A set of SCA, hot-pluggable disks. Every fs movable, >>> resizable (up/down), every disk content movable from/to every other >>> one.... the perfect power-on once, run till-end-of-universe server. >> >> *nod* have you heard of RAID? :) > > I think he meant maybe adding more RAID volumes :) As per earlier in the > thread, resizing is a ffs issue, not ufs. Resizing an FFS would definitely > be hard but not _impossible_. What exactly did Kirk say? From a review of a paper I presented last year: > Future directions (pg 22): Extensible UFS: making UFS bigger > is trivial. Cutting it back is not. I didn't follow up. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message