From owner-freebsd-stable@FreeBSD.ORG Thu Jun 7 09:09:53 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C2884106564A for ; Thu, 7 Jun 2012 09:09:53 +0000 (UTC) (envelope-from daniel@digsys.bg) Received: from smtp-sofia.digsys.bg (smtp-sofia.digsys.bg [193.68.3.230]) by mx1.freebsd.org (Postfix) with ESMTP id 477958FC08 for ; Thu, 7 Jun 2012 09:09:53 +0000 (UTC) Received: from dcave.digsys.bg (dcave.digsys.bg [192.92.129.5]) (authenticated bits=0) by smtp-sofia.digsys.bg (8.14.5/8.14.5) with ESMTP id q5799h0L064579 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Thu, 7 Jun 2012 12:09:45 +0300 (EEST) (envelope-from daniel@digsys.bg) Message-ID: <4FD06FD7.2000708@digsys.bg> Date: Thu, 07 Jun 2012 12:09:43 +0300 From: Daniel Kalchev User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:10.0.4) Gecko/20120528 Thunderbird/10.0.4 MIME-Version: 1.0 To: freebsd-stable@freebsd.org References: <3CEF3B39-BE1E-4FC4-81F3-D26049C83313@netflix.com> In-Reply-To: <3CEF3B39-BE1E-4FC4-81F3-D26049C83313@netflix.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Netflix's New Peering Appliance Uses FreeBSD 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: Thu, 07 Jun 2012 09:09:53 -0000 On 06.06.12 03:16, Scott Long wrote: [...] > Each disk has its own UFS+J filesystem, except for > the SSDs that are mirrored together with gmirror. The SSDs hold the OS image > and cache some of the busiest content. The other disks hold nothing but the > audio and video files for our content streams. Could you please explain the rationale of using UFS+J for this large storage. Your published documentation states that you have reasonable redundancy in case of multiple disk failure and I wonder how you handle this with "plain" UFS. Things like avoiding hangs and panics when an disk is going to die. Daniel