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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 A0AE8C433B4 for ; Mon, 5 Apr 2021 17:46:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4BB6961396 for ; Mon, 5 Apr 2021 17:46:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233140AbhDERq5 (ORCPT ); Mon, 5 Apr 2021 13:46:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232131AbhDERq4 (ORCPT ); Mon, 5 Apr 2021 13:46:56 -0400 Received: from u17383850.onlinehome-server.com (u17383850.onlinehome-server.com [IPv6:2607:f1c0:83f:ac00::a6:f62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6089DC061756 for ; Mon, 5 Apr 2021 10:46:50 -0700 (PDT) Received: by u17383850.onlinehome-server.com (Postfix, from userid 5001) id B8A2779A; Mon, 5 Apr 2021 13:46:49 -0400 (EDT) Date: Mon, 5 Apr 2021 13:46:49 -0400 From: David T-G To: Linux RAID list Subject: Re: bitmaps on xfs Message-ID: <20210405174649.GH1415@justpickone.org> References: <20210328021210.GA1415@justpickone.org> <20210402004001.GH1711@justpickone.org> <62cc89ea-b9cf-d8a3-3d52-499fd84f7cc3@youngman.org.uk> <20210402050554.GF1415@justpickone.org> <20210405034659.GG1415@justpickone.org> <5f58e78d-8d8c-c66c-7674-79832e22f200@youngman.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5f58e78d-8d8c-c66c-7674-79832e22f200@youngman.org.uk> User-Agent: Mutt/1.5.21 (2010-09-15) Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Wol & Roger, et al -- ...and then antlists said... % % On 05/04/2021 12:30, Roger Heflin wrote: % >> diskfarm:~ # grep /mnt/ssd /etc/fstab % >> LABEL=diskfarm-ssd /mnt/ssd xfs defaults 0 0 % >> % >>will work for my bitmap files target, since all I see is that it must be % >>an ext2 or ext3 (not ext4? old news?) device. % % Bear in mind you're better off using a journal (and bitmaps and % journals are incompatible). A journal of the filesystem (XFS or ReiserFS) on the RAID5 device? Or a journal of the actual md? diskfarm:~ # df -kh /mnt/4Traid5md/ /mnt/750Graid5md/ Filesystem Size Used Avail Use% Mounted on /dev/md0p1 11T 11T 309G 98% /mnt/4Traid5md /dev/md127p1 1.4T 1.4T 14G 100% /mnt/750Graid5md diskfarm:~ # mount | grep /dev/md /dev/md0p1 on /mnt/4Traid5md type xfs (rw,relatime,attr2,inode64,logbufs=8,logbsize=32k,sunit=1024,swidth=2048,noquota) /dev/md127p1 on /mnt/750Graid5md type reiserfs (rw,relatime) % ... % >I am about to do some array reworks to go from all 3tb disks to start % >using some 6tb disks. If the file was pre-allocated I would not ... % > % Umm... don't use all the space on your 6TB disks. I'm planning to % build my arrays on dm-integrity, which will make raid 5 a bit more % trustworthy. [snip] Oooh, something else to learn :-) I hope to go from 4 drives to 6 when I do, and I'll be buying the best GB/$ at the time, but it will also be a grow-over-time thing. Thanks again & HAND :-D -- David T-G See http://justpickone.org/davidtg/email/ See http://justpickone.org/davidtg/tofu.txt