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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 2D04AC2D0CE for ; Tue, 21 Jan 2020 09:51:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3A3620882 for ; Tue, 21 Jan 2020 09:51:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="eg8tIahv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728797AbgAUJvy (ORCPT ); Tue, 21 Jan 2020 04:51:54 -0500 Received: from mail-wm1-f50.google.com ([209.85.128.50]:54716 "EHLO mail-wm1-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727220AbgAUJvx (ORCPT ); Tue, 21 Jan 2020 04:51:53 -0500 Received: by mail-wm1-f50.google.com with SMTP id b19so2207249wmj.4 for ; Tue, 21 Jan 2020 01:51:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:references:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=oJbE2zAIAoGEfKaEO/ehpFxHP50fghEXle+4oUJGqXM=; b=eg8tIahvVYU3+qB4Rtuvq7jB3voxORKRzUh1V+503H+sspqWWgq/FRo3F+K2Z/pFUE DvVrTlOb02+KrkbFRKQ8vZ6T2V6NY50jZjYMzzEjHuxTwzm61BOc6HCu0gTb9FhlsLx2 3G57Ne0JMZRn19/qtVK74Knee27bWAm9mfp/9P30sicIm3puLMkWBSmVHX3gmGHW8tKm uUVILTWSgvQrw3a3vaQpw1euGPwTdOdZoJ4M77gir2R2Najc1Ej5LeiPgRJCJtpEudZV u2k8nJkLb2Bt2r+nBqptn7lxB1sVfDxMDZnK480if/NHggG/iDwNRmpmwNa/h5pIv2af LErQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=oJbE2zAIAoGEfKaEO/ehpFxHP50fghEXle+4oUJGqXM=; b=miZqO0J6nVQN6HX+v79Ipo6bNbF0XeelyD0UN3Bb+JenH0Pj6o3KiRwf41TFVc8Vfs m6qOxHR5inGBF0cx5THdG5NbqR4kL4xB0M0y0G+CeZJDFEryZjpmUQctouKEq34zV04k fAebQcakLmp8wreRnwTPF4Jds1BM5Pl3ouec/qqs0BjMXzSFLjHEvPt7QW6TuAZi5bhj hX0rU7Sv8BPNhUuzaL1GUUvfpv1ORgxgk3dE/bxWmYHM4Crd51UBth6v9NSr8GBVeGdL 4/gYtynUlpRg7n2cGLsysB+vC8dIRWmzDo6klxZyypW2TGv3ag1T6UjLuom+27Y/j6c+ MB9w== X-Gm-Message-State: APjAAAUQVfdiywwjkv8diUxKh4XooK9LqHWWQ8oRvBMaJ1gcwsj0pLFx jdJqyQGbCU+H2BtQg/eBHh7OCR7z X-Google-Smtp-Source: APXvYqw+mDUUAIV/KgEPgSFq1icPBbICI3wvr0okGizP1wsyr4aEvdUL2sub7n/7Neo6wp+7E4sGxQ== X-Received: by 2002:a7b:cb0a:: with SMTP id u10mr3527077wmj.165.1579600311538; Tue, 21 Jan 2020 01:51:51 -0800 (PST) Received: from [172.23.13.41] ([159.255.217.230]) by smtp.gmail.com with ESMTPSA id z11sm53887667wrt.82.2020.01.21.01.51.50 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Jan 2020 01:51:50 -0800 (PST) Subject: Re: btrfs raid1 balance slow From: kjansen387 To: linux-btrfs@vger.kernel.org References: <6bc329d9-6dc5-a4bc-e7c4-eccd377823eb@gmail.com> Message-ID: <176ec92f-56ba-4c8a-bcce-115c69fb7eeb@gmail.com> Date: Tue, 21 Jan 2020 10:51:48 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.3.1 MIME-Version: 1.0 In-Reply-To: <6bc329d9-6dc5-a4bc-e7c4-eccd377823eb@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: nl Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Forgot to mention; I'm running kernel 5.4.10-200.fc31.x86_64 . Op 20-Jan-20 om 23:08 schreef kjansen387: > Hello, > > I had a btrfs raid1 with 2 4TB SATA 5400RPM disks . Regular disk I/O is > about 2MB/sec per drive, ~40IOPS, mostly write. I had ~150GB free and > added one 2 TB disk and started the balance: > > btrfs device add -f /dev/sdb /export > btrfs filesystem balance /export > > It's now running for 24 hours, 70% remaining: > > # btrfs balance status -v /export > Balance on '/export' is running > 1057 out of about 3561 chunks balanced (1058 considered),  70% left > Dumping filters: flags 0x7, state 0x1, force is off >   DATA (flags 0x0): balancing >   METADATA (flags 0x0): balancing >   SYSTEM (flags 0x0): balancing > > I have searched for similar cases, but, I do not have quotas enabled, I > do not have compression enabled, and my CPU supports sse4_2 . CPU > (i7-8700K) is doing fine, 80% idle (average over all threads). > > Is this normal ? I have to repeat this process 2 times (adding more 2TB > disks), any way I can make it faster ? > > Thanks! > Klaas >