From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from csamuel.org ([74.50.50.137]:38059 "EHLO csamuel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753666AbbDHNS2 (ORCPT ); Wed, 8 Apr 2015 09:18:28 -0400 Received: from localhost (localhost [127.0.0.1]) by csamuel.org (Postfix) with ESMTP id 2F1BC40514 for ; Wed, 8 Apr 2015 23:13:05 +1000 (AEST) Received: from csamuel.org ([127.0.0.1]) by localhost (csamuel.org [127.0.0.1]) (amavisd-maia, port 10024) with LMTP id 28074-05 for ; Wed, 8 Apr 2015 23:13:05 +1000 (AEST) Received: from quad.localnet (ppp59-167-127-196.static.internode.on.net [59.167.127.196]) by csamuel.org (Postfix) with ESMTPSA id CD1E740474 for ; Wed, 8 Apr 2015 23:13:04 +1000 (AEST) From: Chris Samuel To: "linux-btrfs@vger.kernel.org" Subject: Re: Porting BTRFS to user space Date: Wed, 08 Apr 2015 23:13:01 +1000 Message-ID: <9805000.6VT5HnkAKH@quad> In-Reply-To: <20150408122757.GN13864@carfax.org.uk> References: <1463140364.591861428494608421.JavaMail.weblogic@epmlwas09b> <20150408122757.GN13864@carfax.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Wed, 8 Apr 2015 12:27:57 PM Hugo Mills wrote: > (NFS, Ceph, Gluster certainly work this way. I would be surprised if > any of the others out there at the moment didn't work like that). GPFS has its own underlying filesystem format, you can upgrade the format on the fly with mmchfs once all your GPFS nodes are at the same minimum version. Painful IBM URL follows: http://www-01.ibm.com/support/knowledgecenter/#!/SSFKCN_4.1.0/com.ibm.cluster.gpfs.v4r1.gpfs100.doc/bl1adm_fsmigissues.htm All the best, Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC