Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932099AbVIDWSt (ORCPT ); Sun, 4 Sep 2005 18:18:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932097AbVIDWSs (ORCPT ); Sun, 4 Sep 2005 18:18:48 -0400 Received: from rgminet04.oracle.com ([148.87.122.33]:4995 "EHLO rgminet04.oracle.com") by vger.kernel.org with ESMTP id S932096AbVIDWSr (ORCPT ); Sun, 4 Sep 2005 18:18:47 -0400 Date: Sun, 4 Sep 2005 15:18:20 -0700 From: Joel Becker To: Pavel Machek Cc: David Teigland , Andrew Morton , Alan Cox , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-cluster@redhat.com Subject: Re: GFS, what's remaining Message-ID: <20050904221820.GB8684@ca-server1.us.oracle.com> Mail-Followup-To: Pavel Machek , David Teigland , Andrew Morton , Alan Cox , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-cluster@redhat.com References: <20050901104620.GA22482@redhat.com> <20050901035939.435768f3.akpm@osdl.org> <1125586158.15768.42.camel@localhost.localdomain> <20050901132104.2d643ccd.akpm@osdl.org> <20050903051841.GA13211@redhat.com> <20050904203344.GA1987@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050904203344.GA1987@elf.ucw.cz> X-Burt-Line: Trees are cool. X-Red-Smith: Ninety feet between bases is perhaps as close as man has ever come to perfection. User-Agent: Mutt/1.5.10i X-Brightmail-Tracker: AAAAAQAAAAI= X-Whitelist: TRUE Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1232 Lines: 35 On Sun, Sep 04, 2005 at 10:33:44PM +0200, Pavel Machek wrote: > > - read-only mount > > - "specatator" mount (like ro but no journal allocated for the mount, > > no fencing needed for failed node that was mounted as specatator) > > I'd call it "real-read-only", and yes, that's very usefull > mount. Could we get it for ext3, too? In OCFS2 we call readonly+journal+connected-to-cluster "soft readonly". We're a live node, other nodes know we exist, and we can flush pending transactions during the rw->ro transition. In addition, we can allow a ro->rw transition. The no-journal+no-cluster-connection mode we call "hard readonly". This is the mode you get when a device itself is readonly, because you can't do *anything*. Joel -- "Lately I've been talking in my sleep. Can't imagine what I'd have to say. Except my world will be right When love comes back my way." Joel Becker Senior Member of Technical Staff Oracle E-mail: joel.becker@oracle.com Phone: (650) 506-8127 - 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/