From owner-freebsd-stable@FreeBSD.ORG Sat Jan 8 09:29:10 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BCBEA10656C8 for ; Sat, 8 Jan 2011 09:29:10 +0000 (UTC) (envelope-from joe@tao.org.uk) Received: from alpha.tao.org.uk (alpha.tao.org.uk [212.42.1.232]) by mx1.freebsd.org (Postfix) with ESMTP id 7E7228FC12 for ; Sat, 8 Jan 2011 09:29:10 +0000 (UTC) Received: from [90.155.77.83] (p4.dhcp.tao.org.uk [90.155.77.83]) (Authenticated sender: joemail@alpha.tao.org.uk) by alpha.tao.org.uk (Postfix) with ESMTPA id 4C3A61076DE7; Sat, 8 Jan 2011 09:13:44 +0000 (GMT) References: <4D21E679.80002@my.gd> <84882169-0461-480F-8B4C-58E794BCC8E6@my.gd> <488AE93A-97B9-4F01-AD0A-0098E4B329C3@my.gd> <4D25BF91.7070304@my.gd> <4D25C760.4070703@digsys.bg> <20110107111635.GL28453@over-yonder.net> In-Reply-To: Mime-Version: 1.0 (iPad Mail 8C148) Content-Type: text/plain; charset=us-ascii Message-Id: <2E0FDC35-B6E3-49C7-A55B-B1B08FFBF1DB@tao.org.uk> Content-Transfer-Encoding: quoted-printable X-Mailer: iPad Mail (8C148) From: Josef Karthauser Date: Sat, 8 Jan 2011 09:14:19 +0000 To: Artem Belevich Cc: "freebsd-stable@freebsd.org" , "Matthew D. Fuller" , Daniel Kalchev Subject: Re: ZFS - moving from a zraid1 to zraid2 pool with 1.5tb disks X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 Jan 2011 09:29:10 -0000 On 7 Jan 2011, at 17:30, Artem Belevich wrote: > One way to get specific ratio for *your* pool would be to collect > record size statistics from your pool using "zdb -L -b " and > then calculate L2ARC:ARC ratio based on average record size. I'm not > sure, though whether L2ARC stores records in compressed or > uncompressed form. Can someone point me to a reference describing the various zfs caches availa= ble? What's the arc and zil? Ive been running some zfs for a few years now, a= nd must have missed thus entire subject :/. Joe=