From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.virtall.com ([178.63.195.102]:48876 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752006AbaHTJ3W convert rfc822-to-8bit (ORCPT ); Wed, 20 Aug 2014 05:29:22 -0400 Received: from mailext.virtall.com (localhost [127.0.0.1]) by mailext.virtall.com (Postfix) with ESMTP id B04983519A5 for ; Wed, 20 Aug 2014 11:23:26 +0200 (CEST) To: linux-btrfs Subject: Re: Questions on using BtrFS for fileserver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Date: Wed, 20 Aug 2014 11:23:26 +0200 From: Tomasz Chmielewski Message-ID: <0f416a00a2dabac75caa768581a5e965@admin.virtall.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: >> we are thinking about using BtrFS on standard hardware for a >> fileserver with about 50T (100T raw) of storage (25×4TByte). >> > > I would recommend carefully reading this thread titled: "1 week to > rebuid 4x 3TB raid10 is a long time!" So I have a 2 x 2.6 TB devices in btrfs RAID-1, 716G used. Linux 3.16. One of the disks failed. "btrfs device delete missing /home" is taking 9 days so far, on an idle system: root 4828 0.3 0.0 17844 260 pts/1 D+ Aug11 38:18 btrfs device delete missing /home There is some kind of btrfs debug info printed in dmesg which seems to tell me that the operation is working, like: [744657.598810] BTRFS info (device sda4): relocating block group 908951814144 flags 17 [744672.021612] BTRFS info (device sda4): found 4784 extents [744688.604997] BTRFS info (device sda4): found 4784 extents [744689.133397] BTRFS info (device sda4): relocating block group 910025555968 flags 17 [744701.162678] BTRFS info (device sda4): found 4196 extents [744725.000459] BTRFS info (device sda4): found 4196 extents but other than that, the recovery time doesn't look optimistic to me, there is no ability to check the progress etc. -- Tomasz Chmielewski http://www.sslrack.com