From owner-freebsd-questions@freebsd.org Wed Sep 9 14:24:58 2015 Return-Path: Delivered-To: freebsd-questions@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 A63DD9CD256 for ; Wed, 9 Sep 2015 14:24:58 +0000 (UTC) (envelope-from steve@sohara.org) Received: from uk1rly2283.eechost.net (relay01.mail.uk1.eechost.net [217.69.40.69]) by mx1.freebsd.org (Postfix) with ESMTP id 6F41C19B1 for ; Wed, 9 Sep 2015 14:24:57 +0000 (UTC) (envelope-from steve@sohara.org) Received: from [88.151.27.41] (helo=smtp.marelmo.com) by uk1rly2283.eechost.net with esmtpa (Exim 4.72) (envelope-from ) id 1ZZftF-0005RX-Nk for freebsd-questions@freebsd.org; Wed, 09 Sep 2015 14:58:21 +0100 Received: from [192.168.63.1] (helo=steve.lan.sohara.org) by smtp.marelmo.com with smtp (Exim 4.85 (FreeBSD)) (envelope-from ) id 1ZZftF-000ODP-0a for freebsd-questions@freebsd.org; Wed, 09 Sep 2015 13:58:21 +0000 Date: Wed, 9 Sep 2015 14:58:20 +0100 From: Steve O'Hara-Smith To: freebsd-questions@freebsd.org Subject: Re: Storage question Message-Id: <20150909145820.c3b48aafad4f70553c1c1fd8@sohara.org> In-Reply-To: <55F031A0.40500@hiwaay.net> References: <55EF3D23.5060009@hiwaay.net> <20150908220639.20412cbd@gumby.homeunix.com> <55EF5409.8020007@yahoo.com> <55EFC2DA.3020101@hiwaay.net> <08B351DD-AA48-4F30-B0D6-C500D0877FB3@lafn.org> <55F02DC8.7000706@hiwaay.net> <20150909150626.5c3b99e5.freebsd@edvax.de> <55F031A0.40500@hiwaay.net> X-Mailer: Sylpheed 3.4.3 (GTK+ 2.24.28; amd64-portbld-freebsd10.1) X-Clacks-Overhead: "GNU Terry Pratchett" Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Auth-Info: 24227@permanet.ie (plain) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Sep 2015 14:24:58 -0000 On Wed, 9 Sep 2015 08:23:54 -0453.75 "William A. Mahaffey III" wrote: > I like ZFS in principal (it's one of the things that attracted me to > FreeBSD about a year ago), but, as someone else noted, it seems to > require lots of RAM & possibly CPU for best effect. The MythTV box is an > AMD A4-5000, 1.5 GHz quad-core jaguar, w/ 16 GB of RAM, which isn't My house fileserver (erm NAS in modern speak) is a dual core Atom with 4GB. It manages a 4x2TB RAIDZ2 as well as a bunch of jails. According to top it has 2432M for ARC (3592M altogether is wired). Memory is tight but it's not swapping, and it doesn't no matter what the load. Switching to your spec would be a hefty upgrade and would almost certainly make things faster, but then most things can be made faster with an extra expenditure. > especially robusto by today's standards, so I am staying w/ UFS. Someone If you have the opportunity then benchmark ZFS and see, if you can run it the benefits are great. -- Steve O'Hara-Smith