From owner-freebsd-fs@freebsd.org Tue Feb 16 01:30:22 2016 Return-Path: Delivered-To: freebsd-fs@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 77569AAA119 for ; Tue, 16 Feb 2016 01:30:22 +0000 (UTC) (envelope-from paul@kraus-haus.org) Received: from mail-yk0-x235.google.com (mail-yk0-x235.google.com [IPv6:2607:f8b0:4002:c07::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3911418FC for ; Tue, 16 Feb 2016 01:30:21 +0000 (UTC) (envelope-from paul@kraus-haus.org) Received: by mail-yk0-x235.google.com with SMTP id u9so67329643ykd.1 for ; Mon, 15 Feb 2016 17:30:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kraus-haus-org.20150623.gappssmtp.com; s=20150623; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Nzq2VGaEGyfOuMFpQcAugE/Os7Yaz7VQxq18tzvTk8I=; b=Jkm2nsOT/HGlTC1e6t0ZBpXNvNwkNRFiEh3YhcnKPSohw/tMiA7458Ke6mFBAaei+6 gTTq7BgHHYhgHx+SckNTEUnTT73EEaoCXGXkkVzaKPeMoqIbLzORNZw/UBC3GEJskTgq mGtvb3VZBSzcjw2m0nbjqTd2Dqhs1vj7lz/3FVagcF1U1aJ7+qtA7tNAFXeS+4rnefMV Fuj1j3ZNGquKVRZ+RevmJs+zYRZ30kOzvR4fU1kx0d+w27YIsXfm6m3V0HitnZHG8ig4 PWXvlrkHt4zXEi3AIn3sB6VaIr9/RJjP7yUXieYBZyeCzMUEXzee8apKosIVffTWLCp8 iOZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:mime-version:content-type:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=Nzq2VGaEGyfOuMFpQcAugE/Os7Yaz7VQxq18tzvTk8I=; b=NDYpnK743MHPqm6J1W8k7pny6c0sGL14J7C0A8DYSdgGA4dED/kjbajqqjfwnrgbZX igeuybAOzSFyFI1KBnTLAFWHiDEQxAJlyl50vvXGejbWzs/iBoRomnpcTRacue+IWHSj 5gmWEUfQdj1j2Q2pDUKZ6mEppPJyXIiP6i7G5/3n1pVQT2KIaD/oXqXyekb/GT2izZdG 4JR0S8EvF/qEL5F0VW6/VscasBj02Es/0myukneweai4w3gG2JXTNrcrk1P+caHyFQYv mIZeZmZ3ysDe5jTzWDvGt0ExxseOoVMz7ZO8JizZQsFThvtmmzeyW+HQwdUoGuhWnerf zS2Q== X-Gm-Message-State: AG10YORAVamh6bnOxHaOpOXL0bQrnO+sqlpiSApR2FyJmDQ55Fw9KTjR42KhZHJ9ky3/BA== X-Received: by 10.37.59.72 with SMTP id i69mr10796743yba.30.1455586220934; Mon, 15 Feb 2016 17:30:20 -0800 (PST) Received: from [192.168.2.138] (pool-100-4-209-221.albyny.fios.verizon.net. [100.4.209.221]) by smtp.gmail.com with ESMTPSA id h200sm22659810ywc.44.2016.02.15.17.30.18 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 15 Feb 2016 17:30:18 -0800 (PST) Subject: Re: Hours of tiny transfers at the end of a ZFS resilver? Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: text/plain; charset=us-ascii From: Paul Kraus In-Reply-To: <20160215213506.GB28757@in-addr.com> Date: Mon, 15 Feb 2016 20:30:10 -0500 Cc: freebsd-fs@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <8E04E52A-2635-4253-8140-F69495D7D0A6@panasas.com> <56C23E5B.7060207@multiplay.co.uk> <20160215213506.GB28757@in-addr.com> To: Gary Palmer X-Mailer: Apple Mail (2.1878.6) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Feb 2016 01:30:22 -0000 On Feb 15, 2016, at 16:35, Gary Palmer wrote: > It should be noted that ZFS can do the right thing only at pool = creation > time. Once the pool has been created the sector size of the = underlying > disks is baked in and can only be changed by creating a new pool on > the advanced format disks (or forcing the larger ashift value when > you initially create the pool, even if the disks are really 512 byte > sector drives) Is it baked in at the pool layer or the vdev layer ? I thought the = ashift was set on a vdev by vdev basis. -- Paul Kraus paul@kraus-haus.org