From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D56B0C3F2D1 for ; Sun, 1 Mar 2020 10:41:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 547A1214DB for ; Sun, 1 Mar 2020 10:41:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=wpkg.org header.i=@wpkg.org header.b="MAmG4ewp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725884AbgCAKiT (ORCPT ); Sun, 1 Mar 2020 05:38:19 -0500 Received: from mail.virtall.com ([46.4.129.203]:49492 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725827AbgCAKiS (ORCPT ); Sun, 1 Mar 2020 05:38:18 -0500 X-Greylist: delayed 459 seconds by postgrey-1.27 at vger.kernel.org; Sun, 01 Mar 2020 05:38:16 EST Received: from mail.virtall.com (localhost [127.0.0.1]) by mail.virtall.com (Postfix) with ESMTP id 2ED4D3F630C8 for ; Sun, 1 Mar 2020 10:30:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wpkg.org; s=default; t=1583058636; bh=cRmqdcYPbhO5nkRkZY5ClqhOhEjMgx7o3lw5vlY4KA4=; h=Date:From:To:Subject; b=MAmG4ewpW9sMST0SVbqFBddKEprklQO71ydTuz2wWsMuwp1R/6T9AnXd1dkblM/7N Kyh1m+H96ybR87X++u9paKpWmrvkci5uRA4lbywiyENzYZHxOIwHfK+5Ig4LDH3dAW UaFfschSqxIlmiqAb+dqAgJMNyGK6B2fpPLJC3It8dhkWZ3cd28IdrZ12CBXz4my1l VOBeNsktAyEEIsE1ckZ1Qwqk91zGKvvJUn85sAxq7kpgHci5xtrAEe04UohHp/ZGd6 9EUnpbzrskwDpU1tx1mV0WaA+MAuyXdnF51g+8Z3dQ9Heif3EMXj30RJC5pRec03JA UtjE2VQLZji0w== X-Fuglu-Suspect: bb06b23b802e4512be6d385988fb479a X-Fuglu-Spamstatus: NO Received: from localhost (localhost [127.0.0.1]) (Authenticated sender: tch@virtall.com) by mail.virtall.com (Postfix) with ESMTPSA for ; Sun, 1 Mar 2020 10:30:35 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Sun, 01 Mar 2020 19:30:34 +0900 From: Tomasz Chmielewski To: Btrfs BTRFS Subject: balance conversion from RAID-1 to RAID-10 leaves some metadata in RAID-1? Message-ID: <56ef4bcdd854a9dde3cbe2f5760592ed@wpkg.org> X-Sender: mangoo@wpkg.org Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Just finished a conversion from RAID-1 to RAID-10, on Linux 5.5.6: # time btrfs balance start -dconvert=raid10 -mconvert=raid10 /data/lxd Done, had to relocate 2064 out of 2064 chunks real 1811m51.427s user 0m0.000s sys 1259m34.448s # echo $? 0 # dmesg (...) [211862.205521] BTRFS info (device sda2): found 40805 extents [211910.773888] BTRFS info (device sda2): found 40805 extents [211965.321150] BTRFS info (device sda2): relocating block group 3492979671040 flags data|raid1 [211972.743476] BTRFS info (device sda2): found 37221 extents [212020.193342] BTRFS info (device sda2): found 37221 extents [212084.580739] BTRFS info (device sda2): balance: ended with status: 0 To my surprise, some metadata is still RAID-1 - is it expected? # btrfs fi usage /data/lxd Overall: Device size: 6.91TiB Device allocated: 6.70TiB Device unallocated: 210.40GiB Device missing: 0.00B Used: 3.96TiB Free (estimated): 1.46TiB (min: 1.46TiB) Data ratio: 2.00 Metadata ratio: 2.00 Global reserve: 512.00MiB (used: 0.00B) Data,RAID10: Size:3.32TiB, Used:1.97TiB (59.20%) /dev/sda2 1.66TiB /dev/sdd2 1.66TiB /dev/sdc2 1.66TiB /dev/sdb2 1.66TiB Metadata,RAID1: Size:2.00GiB, Used:85.02MiB (4.15%) /dev/sdc2 2.00GiB /dev/sdb2 2.00GiB Metadata,RAID10: Size:29.00GiB, Used:12.55GiB (43.27%) /dev/sda2 14.50GiB /dev/sdd2 14.50GiB /dev/sdc2 14.50GiB /dev/sdb2 14.50GiB System,RAID10: Size:64.00MiB, Used:400.00KiB (0.61%) /dev/sda2 32.00MiB /dev/sdd2 32.00MiB /dev/sdc2 32.00MiB /dev/sdb2 32.00MiB Unallocated: /dev/sda2 53.60GiB /dev/sdd2 53.60GiB /dev/sdc2 51.60GiB /dev/sdb2 51.60GiB # btrfs fi df /data/lxd Data, RAID10: total=3.32TiB, used=1.97TiB System, RAID10: total=64.00MiB, used=400.00KiB Metadata, RAID10: total=29.00GiB, used=12.55GiB Metadata, RAID1: total=2.00GiB, used=85.02MiB GlobalReserve, single: total=512.00MiB, used=0.00B # btrfs fi show /data/lxd Label: 'lxd5' uuid: 2b77b498-a644-430b-9dd9-2ad3d381448a Total devices 4 FS bytes used 1.98TiB devid 1 size 1.73TiB used 1.67TiB path /dev/sda2 devid 3 size 1.73TiB used 1.67TiB path /dev/sdd2 devid 4 size 1.73TiB used 1.68TiB path /dev/sdc2 devid 5 size 1.73TiB used 1.68TiB path /dev/sdb2 Tomasz Chmielewski https://lxadm.com