Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756913AbYGOWqD (ORCPT ); Tue, 15 Jul 2008 18:46:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756730AbYGOWpi (ORCPT ); Tue, 15 Jul 2008 18:45:38 -0400 Received: from mail.fieldses.org ([66.93.2.214]:33761 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757911AbYGOWph (ORCPT ); Tue, 15 Jul 2008 18:45:37 -0400 Date: Tue, 15 Jul 2008 18:45:35 -0400 To: Sage Weil Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, ceph-devel@lists.sourceforge.net Subject: Re: Recursive directory accounting for size, ctime, etc. Message-ID: <20080715224535.GB28739@fieldses.org> References: <20080715195333.GK21590@fieldses.org> <20080715204812.GD25803@fieldses.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) From: "J. Bruce Fields" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1382 Lines: 27 On Tue, Jul 15, 2008 at 02:16:45PM -0700, Sage Weil wrote: > On Tue, 15 Jul 2008, J. Bruce Fields wrote: > > I just wonder how one would explain to users (or application writers) > > why changes to a file are reflected in the parent's rctime in one case, > > and not in another, especially if the primary link is otherwise > > indistinguishable from the others. The symptoms could be a bit > > mysterious from their point of view. > > Yes. I'm not sure it can really be avoided, though. I'm trying to lift > the usual restriction of having to predefine what the > volume/subvolume/qtree boundary is and then disallowing links/renames > between then. When all of a file's links are contained within the > directory you're looking at (i.e. something that might be a subvolume > under that paradigm), things look sensible. If links span two directories > and you're looking at recursive stats for a dir containing only one of > them, then you're necessarily going to have some weirdness (you don't want > to double-count). Yeah, there's no clear right answer--that's partly why I was curious about rctime specifically. --b. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/