From owner-freebsd-stable@freebsd.org Thu May 9 11:02:47 2019 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6B43515A530B for ; Thu, 9 May 2019 11:02:47 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0A202895B1; Thu, 9 May 2019 11:02:47 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from tensor.andric.com (tensor.andric.com [87.251.56.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "tensor.andric.com", Issuer "Let's Encrypt Authority X3" (verified OK)) (Authenticated sender: dim) by smtp.freebsd.org (Postfix) with ESMTPSA id 7F25611516; Thu, 9 May 2019 11:02:46 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from [192.168.1.32] (92-111-45-98.static.v4.ziggozakelijk.nl [92.111.45.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tensor.andric.com (Postfix) with ESMTPSA id A50EF50311; Thu, 9 May 2019 13:02:40 +0200 (CEST) From: Dimitry Andric Message-Id: Content-Type: multipart/signed; boundary="Apple-Mail=_469A87FD-8A9E-406E-BD92-0AA8426A6538"; protocol="application/pgp-signature"; micalg=pgp-sha1 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.8\)) Subject: Re: ZFS... Date: Thu, 9 May 2019 13:02:35 +0200 In-Reply-To: <805ee7f1-83f6-c59e-8107-4851ca9fce6e@quip.cz> Cc: "Patrick M. Hausen" , Michelle Sullivan , FreeBSD-STABLE Mailing List To: Miroslav Lachman <000.fbsd@quip.cz> References: <30506b3d-64fb-b327-94ae-d9da522f3a48@sorbs.net> <70fac2fe3f23f85dd442d93ffea368e1@ultra-secure.de> <70C87D93-D1F9-458E-9723-19F9777E6F12@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> X-Mailer: Apple Mail (2.3445.104.8) X-Rspamd-Queue-Id: 0A202895B1 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.99)[-0.986,0]; ASN(0.00)[asn:11403, ipnet:96.47.64.0/20, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] 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: Thu, 09 May 2019 11:02:47 -0000 --Apple-Mail=_469A87FD-8A9E-406E-BD92-0AA8426A6538 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 9 May 2019, at 10:32, Miroslav Lachman <000.fbsd@quip.cz> wrote: >=20 > Patrick M. Hausen wrote on 2019/05/09 09:46: >> Hi all, >>> Am 09.05.2019 um 00:55 schrieb Michelle Sullivan = : >>> No, one disk in the 16 disk zRAID2 ... previously unseen but it = could be the errors have occurred in the last 6 weeks... everytime I = reboot it started resilvering, gets to 761M resilvered and then stops. >> 16 disks in *one* RAIDZ2 vdev? That might be the cause of your = insanely >> long scrubs. In general it is not recommended though I cannot find = the >> source for that information quickly just now. >=20 > Extremely slow scrub is an issue even on 4 disks RAIDZ. I already = posted about it in the past. This scrub is running from Sunday 3AM. > Time to go is big lie. Is was "19hXXm" 12 hour ago. >=20 > pool: tank0 > state: ONLINE > scan: scrub in progress since Sun May 5 03:01:48 2019 > 10.8T scanned out of 12.7T at 30.4M/s, 18h39m to go > 0 repaired, 84.72% done > config: >=20 > NAME STATE READ WRITE CKSUM > tank0 ONLINE 0 0 0 > raidz1-0 ONLINE 0 0 0 > gpt/disk0tank0 ONLINE 0 0 0 > gpt/disk1tank0 ONLINE 0 0 0 > gpt/disk2tank0 ONLINE 0 0 0 > gpt/disk3tank0 ONLINE 0 0 0 >=20 > 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. -Dimitry --Apple-Mail=_469A87FD-8A9E-406E-BD92-0AA8426A6538 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.2 iF0EARECAB0WIQR6tGLSzjX8bUI5T82wXqMKLiCWowUCXNQIywAKCRCwXqMKLiCW o6PJAJ46s0gYN0kphqx0InDDAuwcTB7V3QCg3z576q235LH8tByPQE4fhWUMVNY= =Sokp -----END PGP SIGNATURE----- --Apple-Mail=_469A87FD-8A9E-406E-BD92-0AA8426A6538--