From owner-freebsd-stable@freebsd.org Sun Sep 15 17:44:11 2019 Return-Path: Delivered-To: freebsd-stable@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id AF525F2E8A for ; Sun, 15 Sep 2019 17:44:11 +0000 (UTC) (envelope-from SRS0=LRJk=XK=quip.cz=000.fbsd@elsa.codelab.cz) Received: from elsa.codelab.cz (elsa.codelab.cz [94.124.105.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 46WcF65stxz4YDR; Sun, 15 Sep 2019 17:44:10 +0000 (UTC) (envelope-from SRS0=LRJk=XK=quip.cz=000.fbsd@elsa.codelab.cz) Received: from elsa.codelab.cz (localhost [127.0.0.1]) by elsa.codelab.cz (Postfix) with ESMTP id DB60728423; Sun, 15 Sep 2019 19:44:07 +0200 (CEST) Received: from illbsd.quip.test (ip-62-24-92-232.net.upcbroadband.cz [62.24.92.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by elsa.codelab.cz (Postfix) with ESMTPSA id 734F628422; Sun, 15 Sep 2019 19:44:06 +0200 (CEST) Subject: Re: ZFS... / scrub speed up From: Miroslav Lachman <000.fbsd@quip.cz> To: Dimitry Andric Cc: FreeBSD-STABLE Mailing List References: <30506b3d-64fb-b327-94ae-d9da522f3a48@sorbs.net> <5ED8BADE-7B2C-4B73-93BC-70739911C5E3@sorbs.net> <2e4941bf-999a-7f16-f4fe-1a520f2187c0@sorbs.net> <20190430102024.E84286@mulder.mintsol.com> <41FA461B-40AE-4D34-B280-214B5C5868B5@punkt.de> <20190506080804.Y87441@mulder.mintsol.com> <08E46EBF-154F-4670-B411-482DCE6F395D@sorbs.net> <33D7EFC4-5C15-4FE0-970B-E6034EF80BEF@gromit.dlib.vt.edu> <7D18A234-E7BF-4855-BD51-4AE2253DB1E4@sorbs.net> <805ee7f1-83f6-c59e-8107-4851ca9fce6e@quip.cz> <5de7f3d3-b34c-0382-b7d4-b7e38339649b@quip.cz> Message-ID: <774cc66f-dd61-c666-6c4f-81c5c2d916b1@quip.cz> Date: Sun, 15 Sep 2019 19:44:05 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.3 MIME-Version: 1.0 In-Reply-To: <5de7f3d3-b34c-0382-b7d4-b7e38339649b@quip.cz> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 46WcF65stxz4YDR X-Spamd-Bar: ++++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of SRS0=LRJk=XK=quip.cz=000.fbsd@elsa.codelab.cz has no SPF policy when checking 94.124.105.4) smtp.mailfrom=SRS0=LRJk=XK=quip.cz=000.fbsd@elsa.codelab.cz X-Spamd-Result: default: False [4.06 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[quip.cz]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.96)[0.962,0]; RCVD_COUNT_THREE(0.00)[3]; IP_SCORE(0.91)[ip: (0.47), ipnet: 94.124.104.0/21(0.23), asn: 42000(3.79), country: CZ(0.07)]; TO_DN_ALL(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[4.105.124.94.list.dnswl.org : 127.0.10.0]; NEURAL_SPAM_LONG(0.98)[0.982,0]; R_SPF_NA(0.00)[]; FORGED_SENDER(0.30)[000.fbsd@quip.cz,SRS0=LRJk=XK=quip.cz=000.fbsd@elsa.codelab.cz]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:42000, ipnet:94.124.104.0/21, country:CZ]; FROM_NEQ_ENVFROM(0.00)[000.fbsd@quip.cz,SRS0=LRJk=XK=quip.cz=000.fbsd@elsa.codelab.cz]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 15 Sep 2019 17:44:11 -0000 Miroslav Lachman wrote on 2019/05/09 13:36: > Dimitry Andric wrote on 2019/05/09 13:02: >> On 9 May 2019, at 10:32, Miroslav Lachman <000.fbsd@quip.cz> wrote: > > [...] > >>> Disks are OK, monitored by smartmontools. There is nothing odd, just >>> the long long scrubs. This machine was started with 4x 1TB (now 4x >>> 4TB) and scrub was slow with 1TB disks too. This machine - HP ML110 >>> G8) was my first machine with ZFS. If I remember it well it was >>> FreeBSD 7.0, now running 11.2. Scrub was / is always about one week. >>> (I tried some sysctl tuning without much gain) >> >> Unfortunately https://svnweb.freebsd.org/changeset/base/339034, which >> greatly speeds up scrubs and resilvers, was not in 11.2 (since it was >> cut at r334458). >> >> If you could update to a more recent snapshot, or try the upcoming 11.3 >> prereleases, you will hopefully see much shorter scrub times. > > Thank you. I will try 11-STABLE / 11.3-PRERELEASE soon and let you know > about the difference. Little bit late because I run scrub once per 60 days. Now on FreeBSD 11.3-RELEASE-p3 scrub takes 2 days and 10 hours instead of 1 week. This is a great improvement! Kind regards Miroslav Lachman