From owner-freebsd-fs@freebsd.org Wed Apr 27 19:59:26 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 28A92B1E03E for ; Wed, 27 Apr 2016 19:59:26 +0000 (UTC) (envelope-from brandon.wandersee@gmail.com) Received: from mail-io0-f196.google.com (mail-io0-f196.google.com [209.85.223.196]) (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 EA1731053 for ; Wed, 27 Apr 2016 19:59:25 +0000 (UTC) (envelope-from brandon.wandersee@gmail.com) Received: by mail-io0-f196.google.com with SMTP id u185so9011744iod.2 for ; Wed, 27 Apr 2016 12:59:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:references:user-agent:from:to:cc:subject :in-reply-to:date:message-id:mime-version; bh=2Bttn2jyi2SN2tOwPommxSC2OUpJLQhw2y8XTtcjErc=; b=h9OOXfdsQI4SwDnv6fjsODHR8osjnMxtccm1qk4JN+u9YK13bKf1wBLUbpfGxZoYCQ YMe34RMd8OGOQ3LVkRB8z6eU08E7jCSS/ylCSC7Lz5gxJDJ8ZjTJrIW7MhYIfdjUVgn0 h8wKdkwME6yb1d6NON1MCaqvU/238SaFl5/pL2sqqhI0jdmMxWeZ2yx7FbjpIa7vQF2I K7M24tXuO1wH6G2slX3lNx2S1LVovVZCH/46WQgSziD0fJrcvu6EG1a/1EzKQXGPrH/8 VzKqiotxA1cxkfEfYCfj65Id7hinJAP1aIYEOIihOPywUMRoU8sHNuUcAh2cbwnHiQ+s LIuA== X-Gm-Message-State: AOPr4FVXUJZSDmeqIAGUvPmps+Wezh4Q3QDjQRJjeZ/D4Wz0Rjh5G7NNbd8gIE2OhjH43g== X-Received: by 10.107.136.208 with SMTP id s77mr14287823ioi.0.1461786346632; Wed, 27 Apr 2016 12:45:46 -0700 (PDT) Received: from WorkBox.Home.gmail.com (63-231-164-200.mpls.qwest.net. [63.231.164.200]) by smtp.gmail.com with ESMTPSA id i9sm5225824ioo.38.2016.04.27.12.45.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 27 Apr 2016 12:45:45 -0700 (PDT) References: <381846248.2672053.1461695277122.JavaMail.yahoo.ref@mail.yahoo.com> <381846248.2672053.1461695277122.JavaMail.yahoo@mail.yahoo.com> User-agent: mu4e 0.9.16; emacs 24.5.1 From: Brandon J. Wandersee To: krad Cc: DH , FreeBSD FS Subject: Re: How to speed up slow zpool scrub? In-reply-to: Date: Wed, 27 Apr 2016 14:45:43 -0500 Message-ID: <86d1pax2c8.fsf@WorkBox.Home> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Apr 2016 19:59:26 -0000 krad writes: > That memory requirement really depends on your work load. I have run small > boxes with 2gb and zfs and they ran fine. They weren't doing filer or > desktop roles though I could get away with fairly easily. Having said that > I wouldn't build a machine now with less than 16gb unless it was very > special circumstances. > Both the FreeNAS documentation and community make some pretty strong recommendations, but last time I checked their docs they admitted their recommendations were aimed more at 100%-uptime professional use cases than casual, personal use cases. Their ECC RAM recommendation also came with a qualification: basically, "If you can't afford it, and downtime to restore a backup is a minor inconvenience, don't worry about it." At this point time, if you're buying all new parts for a DIY storage project, 16Gb of decent non-ECC RAM is likely to be your smallest expense. But if you just want to get some light use out of a spare motherboard at home, less RAM is probably fine. Not necessarily a great idea, but not a bad one either. -- :: Brandon J. Wandersee :: brandon.wandersee@gmail.com :: -------------------------------------------------- :: 'The best design is as little design as possible.' :: --- Dieter Rams ----------------------------------