From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932076AbWGGONp (ORCPT ); Fri, 7 Jul 2006 10:13:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751216AbWGGONp (ORCPT ); Fri, 7 Jul 2006 10:13:45 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:60432 "EHLO spitz.ucw.cz") by vger.kernel.org with ESMTP id S1751219AbWGGONo (ORCPT ); Fri, 7 Jul 2006 10:13:44 -0400 Date: Fri, 7 Jul 2006 14:12:09 +0000 From: Pavel Machek To: "Jeffrey V. Merkey" Cc: "H. Peter Anvin" , Bill Davidsen , Benny Amorsen , linux-kernel@vger.kernel.org Subject: Re: ext4 features Message-ID: <20060707141209.GD4239@ucw.cz> References: <20060701181702.GC8763@irc.pl> <20060703202219.GA9707@aitel.hist.no> <20060703205523.GA17122@irc.pl> <1151960503.3108.55.camel@laptopd505.fenrus.org> <44A9904F.7060207@wolfmountaingroup.com> <20060703232547.2d54ab9b.diegocg@gmail.com> <44AB3E4C.2000407@tmr.com> <44AB4A68.90301@zytor.com> <44AB5210.50501@wolfmountaingroup.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <44AB5210.50501@wolfmountaingroup.com> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > >>Actually, if it were so important it WOULD have been > >>done. I suspect that the issue is not lack of a good > >>solution, but lack of a good problem. The behavior you > >>propose requires a lot of kernel cleverness, including > >>make the inodes seem to go away, so the count is > >>"right" for what the user sees. > >> > > > >The real solution for it is snapshots. > > > Peter, > > Explain what you are thinking here. What I proposed, I > have already implemented in NetWare, it's very easy to > do. Snapshotting is not complex for FS's but does > require a lot of space for meta-data to manage it. EXT > is not architecteced for something this complex. A > simple hidden mv is much easier to do. Patch would be nice :-). Hidden mv is indeed simple; reclaiming space on demand may be trickier. Pavel -- Thanks for all the (sleeping) penguins.