From owner-freebsd-current@freebsd.org Thu Dec 14 11:49:15 2017 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 98EF7EA0EF4 for ; Thu, 14 Dec 2017 11:49:15 +0000 (UTC) (envelope-from ohartmann@walstatt.org) Received: from mout.gmx.net (mout.gmx.net [212.227.17.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mout.gmx.net", Issuer "TeleSec ServerPass DE-2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id F4105803F9 for ; Thu, 14 Dec 2017 11:49:14 +0000 (UTC) (envelope-from ohartmann@walstatt.org) Received: from thor.intern.walstatt.dynvpn.de ([78.51.216.133]) by mail.gmx.com (mrgmx103 [212.227.17.168]) with ESMTPSA (Nemesis) id 0M9s8K-1eIpER0mE4-00B2JZ for ; Thu, 14 Dec 2017 12:49:07 +0100 Date: Thu, 14 Dec 2017 12:48:33 +0100 From: "O. Hartmann" To: FreeBSD CURRENT Subject: ZFS RAIDZ1: resilvering at <17.3M/s => abyssal slow ... Message-ID: <20171214124900.64211bd9@thor.intern.walstatt.dynvpn.de> Organization: WALSTATT User-Agent: OutScare 3.1415926 X-Operating-System: ImNotAnOperatingSystem 3.141592527 MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; boundary="Sig_/VsbDYHS9F7SJap/dAyzdh_s"; protocol="application/pgp-signature" X-Provags-ID: V03:K0:Oh0gCEeW2aKkr18dM7eioemmvdD5kIQjcCsIP28qiGFGa9Z2WXL EOG+5uYBaBZT52bHb+IYUx4inKBsoXr1goEkrl6Gb9InxvfmtMhXiS4iIvZuqlz0QIZzF+X 0Rqt1dN6U+eQgtA0EiREDpvQEYBwO8SZ5Nh+CjkzLZ+TwrhV8BN3eD3wqWQNGQxdFyq2MBX ntZb532OJEhaNArqb86Ug== X-UI-Out-Filterresults: notjunk:1;V01:K0:daV3dJwSULw=:0JjlFCdZ/tB4EhM//csMFa njw6SSk0E2nvUr4J+sVwp5EvY7iCUYVR8/ggjslkZIQ31LJWjYc9bsouz4b0lcKM9oUNTmSIy DrUa9rQ+pB/kZlUJBs0ocJORvnflK2o8RE9dOv8d8e3Yzy8Cfr7qmGHX2oVj2998raYNwcSuM ti39ZcVqq0GByPB6ZKf/o6/yoY0OHpaN74fBJnqJu+GAyqH6TpWGddduZofahg90sjgG7VoEO o23NQhKOBIz+YD9GselI09ZJ797JZN96GcrH/GRG+Ma+j8GlanSxzTt+6+v12vZ9ycqylPXJE H6PPpSWHl2ItojVqjqWPGlQGjMW66oENNd21n30Ff+wXmMCcs+1wXf67uo2u+SRcsbOmBxa3N 3v/pdGB+1tV2GX9rzXf6170OzyQMydscxEb2OfYRIdMdqybrmu7f4KX6eJGS+9CscH5NFZO9y GuyHP52rnnPcOVThEEBsb0YPdOAorbBfXbE195f5KtMj6iw0aPqGEpkRXmxBigZP0tv4mgb98 G8zTLpzuhD2WNIY4xkfN0DhkbEVVTp3WSZN18TpKDzjjUpQtlDGNYjaCEE7YRcsxlbWGayXAw WYzh6h6B2w5F97C4KayRavyM4fejIgN9K0unKl4/yRBBsUA5ooU4X9d5LiZPSbbRR2xf4RJcA jlUgb4ws2pgmD7lPBAl4j9BHUnnejuawUdhZYzmX7H2/1CwmL7uTu22ujFBbromnjE6rC+L3q zZOzEUALSs/hUuCqatA1U2wj4F6nSm2kYhKsTyu8FOfT8rLAB7t73m27+bl0BYYOvB9ttv5fS k6ybm3PnmRZwLfdIsDGKYkt6roB0Q== X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Dec 2017 11:49:15 -0000 --Sig_/VsbDYHS9F7SJap/dAyzdh_s Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hello out there, I had to replace a HDD on a RAIDZ1 pool comprised from 4 HDDs, each 3 TB (n= etto size of the pool is about 8-9 TB, the used amount is reported to be ~ 6TB). I just started the rebuild/resilvering process and watch the pool crwaling = at ~ 18 MB/s. At the moment, there is no load on the array, the host is a IvyBridge XEON = with 4 core/8 threads and 3,4 GHz and 16 GB of RAM. The HDDs are attached to a on-board S= ATA II (300 MB/s max) Intel chip - this just for the record. Recently, I switch on the "sync" attribute on most of the defined pools's z= fs filesystems - I also use a SSD for ZIL/L2ARC caching, but it seems to be unused recentl= y in FreeBSD CURRENT's ZFS - this from a observers perspective only. When scrubbing, I see recently also reduced performance on the pool, so I'm= wondering about the low throughput at the very moment when resilvering is in progress. If the "perspective" of "zpool status" is correct, then I have to wait afte= r two hours for another 100 hours - ~ 4 days? Ups ... I think there is something badly = misconfigured or missing. The pool is not "tuned" in any very sophisticated way, since I trust the ke= rnels ability to scale automatically - if I'm not wrong for amd64 ... Are there any aspects to look at? Thanks in advance, Oliver --=20 O. Hartmann Ich widerspreche der Nutzung oder =C3=9Cbermittlung meiner Daten f=C3=BCr Werbezwecke oder f=C3=BCr die Markt- oder Meinungsforschung (=C2=A7 28 Abs.= 4 BDSG). --Sig_/VsbDYHS9F7SJap/dAyzdh_s Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iLUEARMKAB0WIQQZVZMzAtwC2T/86TrS528fyFhYlAUCWjJlLAAKCRDS528fyFhY lOueAf0V9/0DfpjuMjR+Zaqs2P2bkD1/AMsPjDwtOBgp29Dgjl0qOX1Vf7AKFmVj HE82ZqxG/TpMu5zw7M8PhiLnqRYWAf0QzIIQVr7fv4WmTfYRLBsSwBFzrOwZrpli H/nwaAn1ZJV96wrvmCgYoqspbRWw/R2zN9gGCGRUjUhzFlM/bJsH =HMQZ -----END PGP SIGNATURE----- --Sig_/VsbDYHS9F7SJap/dAyzdh_s--