From owner-freebsd-fs@FreeBSD.ORG Wed Jul 3 15:12:27 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 8140A9F1 for ; Wed, 3 Jul 2013 15:12:27 +0000 (UTC) (envelope-from mxb@alumni.chalmers.se) Received: from mail-la0-f45.google.com (mail-la0-f45.google.com [209.85.215.45]) by mx1.freebsd.org (Postfix) with ESMTP id 07D5111E2 for ; Wed, 3 Jul 2013 15:12:26 +0000 (UTC) Received: by mail-la0-f45.google.com with SMTP id fr10so250177lab.32 for ; Wed, 03 Jul 2013 08:12:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=subject:mime-version:content-type:from:x-priority:in-reply-to:date :cc:content-transfer-encoding:message-id:references:to:x-mailer :x-gm-message-state; bh=+e810TrZ6e/H52JEj76YPdVzcC76QUo2Xbj8T3xc1jw=; b=j7aDGtF3kChBwjEqsev7+54kt1HHotHVL6yjWQS1Mjq1+1qn7zXwFOW77i0abI1Aro mnEzWDX62ZKNT0lx69uzqEyJdYtQWRvUJVGRP61pxRAOZPDqnIF7+cFKaAvSXnvtDo2W 9Fr+T3XTFgfJ3+VFibpSaoZ9Fbk4fZJCnlCJX6sEmGsaiUiqnmnzW/Q63yu5OaNQ5xTA Gf/BB93UNJOjC1bwfZWdeOYCdF5Fgkbh63EHM37IrRtUVZZEk9CR7g5tm7SoabTZojQn 8PUiflELexdrsmuvC1Tf6RE98l7v+//Ly/thVGINfBS0ltoC/SlbB6avxTHlXIteZXbQ PjhA== X-Received: by 10.152.87.172 with SMTP id az12mr727636lab.24.1372864340284; Wed, 03 Jul 2013 08:12:20 -0700 (PDT) Received: from grey.home.unixconn.com (h-74-23.a183.priv.bahnhof.se. [46.59.74.23]) by mx.google.com with ESMTPSA id c4sm11027841lae.7.2013.07.03.08.12.18 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 03 Jul 2013 08:12:19 -0700 (PDT) Subject: Re: Slow resilvering with mirrored ZIL Mime-Version: 1.0 (Mac OS X Mail 6.5 \(1508\)) Content-Type: text/plain; charset=iso-8859-1 From: mxb X-Priority: 3 In-Reply-To: Date: Wed, 3 Jul 2013 17:12:17 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: References: <51D42107.1050107@digsys.bg> <2EF46A8C-6908-4160-BF99-EC610B3EA771@alumni.chalmers.se> <51D437E2.4060101@digsys.bg> To: Steven Hartland X-Mailer: Apple Mail (2.1508) X-Gm-Message-State: ALoCoQmJDwG9bIQbf4RVDFaezRH6mIKNfQUCFVNYPkVuFQd+kpbOwqdhPJFGMtolmYAmelR75qdV Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2013 15:12:27 -0000 Not sure if new are 4k. Done nothing about that. But the SECOND drive, resilvering is SLOW. Not the first one. As stated below. Those changes are introduced to the system. ALL new driver ARE identical, except S/N of cause :) On 3 jul 2013, at 16:55, Steven Hartland = wrote: >=20 > ----- Original Message ----- From: "Daniel Kalchev" > To: "mxb" > Cc: > Sent: Wednesday, July 03, 2013 3:40 PM > Subject: Re: Slow resilvering with mirrored ZIL >=20 >=20 >> On 03.07.13 16:36, mxb wrote: >>> Well, then my question persists - why I get so significant drop of = speed while resilvering second drive. >>> The only changes to the system are: >>>=20 >>> 1. Second partition for ZIL to create a mirror >>> 2. New disks are 7200rpm. old ones are 5400rpm. >>>=20 >=20 > Its not something like the old disks are 512byte sectors > where as the new ones are 4k? >=20 > It this is the case having already replaced one disk you've > killed performance as its having to do lots more work reading > none 4k aligned data? >=20 > Regards > steve >=20 > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > This e.mail is private and confidential between Multiplay (UK) Ltd. = and the person or entity to whom it is addressed. In the event of = misdirection, the recipient is prohibited from using, copying, printing = or otherwise disseminating it or any information contained in it.=20 > In the event of misdirection, illegible or incomplete transmission = please telephone +44 845 868 1337 > or return the E.mail to postmaster@multiplay.co.uk. >=20