From owner-freebsd-fs@FreeBSD.ORG Wed Jul 17 00:29:36 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 B14CC2E0 for ; Wed, 17 Jul 2013 00:29:36 +0000 (UTC) (envelope-from gezeala@gmail.com) Received: from mail-la0-x234.google.com (mail-la0-x234.google.com [IPv6:2a00:1450:4010:c03::234]) by mx1.freebsd.org (Postfix) with ESMTP id 3518BA17 for ; Wed, 17 Jul 2013 00:29:36 +0000 (UTC) Received: by mail-la0-f52.google.com with SMTP id fo12so1044101lab.11 for ; Tue, 16 Jul 2013 17:29:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=WTqss1WK/2Z2odUxS2+sI6OJu5G5J7nMzHOlcf4qoJA=; b=b1ZvuxDNkvIKtIqpnoSoJktpQR+RLzlelVswps8YgdL27f/JquItSP98n9M2ZmJfJY tJMIrJe8Qu+Sp/cAvNqPskCdFocxkK/RDYjegYs9+wVJ2VO6GweSjuCrrJCXNSWm+r6c HSM259UkyhJFtvqjx+AtrDPHIIvAwUEUQ5HXNJU9xiXoij+cb5QM+M4gWex3AbZZQElq meh01OdT0URnqMdPUgaqXwotGc1Nk6+GrfpYE496BdZBWi2ifKU11KFR6iIZnirZZsKt r6Bczcgjq3hUNHBnCLUV+DhHQfF6Vh438uNif5O+49/YuM5DzX4TKYk2+oR+aCNXEYRI +m5A== X-Received: by 10.112.167.100 with SMTP id zn4mr2143351lbb.44.1374020975173; Tue, 16 Jul 2013 17:29:35 -0700 (PDT) MIME-Version: 1.0 Received: by 10.114.82.72 with HTTP; Tue, 16 Jul 2013 17:28:55 -0700 (PDT) In-Reply-To: References: <51D42107.1050107@digsys.bg> <2EF46A8C-6908-4160-BF99-EC610B3EA771@alumni.chalmers.se> <51D437E2.4060101@digsys.bg> <20130704000405.GA75529@icarus.home.lan> <20130704171637.GA94539@icarus.home.lan> <2A261BEA-4452-4F6A-8EFB-90A54D79CBB9@alumni.chalmers.se> <20130704191203.GA95642@icarus.home.lan> <43015E9015084CA6BAC6978F39D22E8B@multiplay.co.uk> <3CFB4564D8EB4A6A9BCE2AFCC5B6E400@multiplay.co.uk> <51D6A206.2020303@digsys.bg> From: =?ISO-8859-1?Q?Gezeala_M=2E_Bacu=F1o_II?= Date: Tue, 16 Jul 2013 17:28:55 -0700 Message-ID: Subject: Re: Slow resilvering with mirrored ZIL To: Freddie Cash Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: FreeBSD Filesystems 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, 17 Jul 2013 00:29:36 -0000 On Fri, Jul 5, 2013 at 6:08 PM, Freddie Cash wrote: > > ZFS- on-Linux has added this as "-o ashift=" property for zpool create. > > There's a threat on the illumos list about standardising this s across all > ZFS- using OSes. > > > +1 on this. We tested zfs-on-linux last year and it does automatically handle disk partitioning for correct alignment. What we do is just add ashift=12 option during zpool create. No more gpart/gnop/ashift/import steps. http://zfsonlinux.org/faq.html#HowDoesZFSonLinuxHandlesAdvacedFormatDrives Back to FreeBSD ZFS, After reading the thread, I'm still at a loss on this (too much info I guess).. regarding gpart/gnop/ashift tweaks for alignment, do we still need to perform gpart on newly purchased (SSD/SATA/SAS) Advanced Format drives? Or, skip gpart and proceed with gnop/ashift only?