From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitri Nikulin Subject: Re: LVM vs btrfs as a "volume manager" for SANs Date: Thu, 23 Apr 2009 10:13:31 +1000 Message-ID: <3a7f57190904221713p1c923e18ga9f3183741cb00ef@mail.gmail.com> References: <49EF6DF7.9020406@wpkg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <49EF6DF7.9020406@wpkg.org> List-ID: On Thu, Apr 23, 2009 at 5:20 AM, Tomasz Chmielewski wrote: > - what happens if SAN machine crashes while the iSCSI file images were being > written to; with LVM and its block devices, I'm somehow more confident it > wouldn't make more data loss than necessary I would hope that COW applies to such a setting. It certainly does for ZFS, making it an excellent backend for iSCSI. At least, having it on btrfs shouldn't make it any less reliable than on LVM, as long as btrfs does its job correctly. -- Dmitri Nikulin Centre for Synchrotron Science Monash University Victoria 3800, Australia