From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f46.google.com ([209.85.215.46]:35976 "EHLO mail-lf0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751060AbdIJHKk (ORCPT ); Sun, 10 Sep 2017 03:10:40 -0400 Received: by mail-lf0-f46.google.com with SMTP id m199so12430299lfe.3 for ; Sun, 10 Sep 2017 00:10:39 -0700 (PDT) Received: from m5-242-50-84.cust.tele2.se ([2a00:801:218:be1:f9d1:56e2:82f6:ef39]) by smtp.googlemail.com with ESMTPSA id p67sm967666lfe.77.2017.09.10.00.10.36 for (version=TLS1_2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256/256); Sun, 10 Sep 2017 00:10:36 -0700 (PDT) Date: Sun, 10 Sep 2017 09:10:36 +0200 (GMT+02:00) From: A L To: linux-btrfs@vger.kernel.org Message-ID: <1f32817.7758af29.15e6aa02e3c@gmail.com> In-Reply-To: <20170909195206.GA11461@rus.uni-stuttgart.de> References: <20170822132208.GD14804@rus.uni-stuttgart.de> <20170909132614.GA20299@rus.uni-stuttgart.de> <20170909133612.7iqwr6cbjxzvfny6@merlins.org> <20170909134426.GB20299@rus.uni-stuttgart.de> <14c87878-a5a0-d7d3-4a76-c55812e751a3@gmail.com> <20170909195206.GA11461@rus.uni-stuttgart.de> Subject: Re: netapp-alike snapshots? MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-btrfs-owner@vger.kernel.org List-ID: Perhaps netapp is using a VFS overlay. There is really only one snapshot but it is shown in the overlay on every folder. Kind of the same with samba Shadow Copies. ---- From: Ulli Horlacher -- Sent: 2017-09-09 - 21:52 ---- > On Sat 2017-09-09 (22:43), Andrei Borzenkov wrote: > >> > Your tool does not create .snapshot subdirectories in EVERY directory like >> >> Neither does NetApp. Those "directories" are magic handles that do not >> really exist. > > I know. > But symbolic links are the next close thing (I am not a kernel programmer). > > >> Apart from obvious problem with recursive directory traversal (NetApp >> .snapshot are not visible with normal directory list) > > Yes, they are, at least sometimes, eg tar includes the snapshots. > > > -- > Ullrich Horlacher Server und Virtualisierung > Rechenzentrum TIK > Universitaet Stuttgart E-Mail: horlacher@tik.uni-stuttgart.de > Allmandring 30a Tel: ++49-711-68565868 > 70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/ > REF:<14c87878-a5a0-d7d3-4a76-c55812e751a3@gmail.com> > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html