From owner-freebsd-geom@FreeBSD.ORG Sat Oct 6 18:41:37 2007 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 990BD16A417 for ; Sat, 6 Oct 2007 18:41:37 +0000 (UTC) (envelope-from softsearch@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.172]) by mx1.freebsd.org (Postfix) with ESMTP id 1167B13C455 for ; Sat, 6 Oct 2007 18:41:36 +0000 (UTC) (envelope-from softsearch@gmail.com) Received: by ug-out-1314.google.com with SMTP id a2so732179ugf for ; Sat, 06 Oct 2007 11:41:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:date:from:reply-to:organization:x-priority:message-id:to:subject:in-reply-to:references:mime-version:content-type:content-transfer-encoding; bh=E+GAnZInKpNXP/5kiJWjrpsh/pN+FEmNmJWY3o1K0g0=; b=EbYN+XfSek+aVKaAFh56alEmIqcEvVuYrm62Dk0XGhahNWkIbRYxbGIjEXocQ0JZiUFOE6gPTJe/fgBbxn3q1Taq9XAJozjs4ySnuxO74vkqRUakY2mDafjSzjWMClR8KUKEj9sAVkDIbMNqRNq1cYOwJt/aFUVx5Z3rEbdckKM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:date:from:reply-to:organization:x-priority:message-id:to:subject:in-reply-to:references:mime-version:content-type:content-transfer-encoding; b=gtF6cZFXQJtaX7F2m6+dVX4Z5+ZLkzmXRup0lzmNWCp6YXhNyHqvsYuHf0OmIgrv+NWHQ0JnKoRJL+3l1ghcHzfg9TBwhy2EptCrSVh3e0QzW+S43VSpZKgk7JKTD2Vda1eDCU5IqTB2Nj2ZM3XJai4W/NhqBK97w3SnlVNy5qA= Received: by 10.67.116.13 with SMTP id t13mr4750730ugm.1191696095559; Sat, 06 Oct 2007 11:41:35 -0700 (PDT) Received: from ?81.200.123.215? ( [81.200.123.215]) by mx.google.com with ESMTPS id 35sm7435807nfu.2007.10.06.11.41.33 (version=SSLv3 cipher=OTHER); Sat, 06 Oct 2007 11:41:34 -0700 (PDT) Date: Sat, 6 Oct 2007 22:40:57 +0400 From: Michael Monashev Organization: SoftSearch.ru X-Priority: 3 (Normal) Message-ID: <1206164665.20071006224057@gmail.com> To: freebsd-geom@freebsd.org In-Reply-To: <20070922111958.GA1614@garage.freebsd.pl> References: <20070921143318.GC5690@garage.freebsd.pl> <20070921170506.GB9445@garage.freebsd.pl> <1310567292.20070921235802@gmail.com> <20070922011847.GH9445@garage.freebsd.pl> <1231480340.20070922112446@gmail.com> <20070922111958.GA1614@garage.freebsd.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: Re[2]: raidtest for zfs X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Michael Monashev List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Oct 2007 18:41:37 -0000 Hi, Pawel. > ZFS ZVOL doesn't present raw blocks to use, like graid3/graid5, so it's > quite possible that because of how the data was written and how ZFS > prefetches the data it's faster than one disk. > You may want to compare one raw disk to single disk pool. Is ZFS mirror faster for random read than gmirror? -- Michael