From owner-freebsd-hackers@FreeBSD.ORG Tue Mar 18 07:34:37 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 92BE5106564A; Tue, 18 Mar 2008 07:34:37 +0000 (UTC) (envelope-from shmukler@mail.ru) Received: from f131.mail.ru (f131.mail.ru [194.67.57.112]) by mx1.freebsd.org (Postfix) with ESMTP id 3C09C8FC1A; Tue, 18 Mar 2008 07:34:37 +0000 (UTC) (envelope-from shmukler@mail.ru) Received: from mail by f131.mail.ru with local id 1JbWLD-000ALT-00; Tue, 18 Mar 2008 10:34:35 +0300 Received: from [69.114.219.103] by win.mail.ru with HTTP; Tue, 18 Mar 2008 10:34:35 +0300 From: Igor Shmukler To: Matthew Dillon Mime-Version: 1.0 X-Mailer: mPOP Web-Mail 2.19 X-Originating-IP: [69.114.219.103] Date: Tue, 18 Mar 2008 10:34:35 +0300 References: <200803172158.m2HLwPSI021438@apollo.backplane.com> In-Reply-To: <200803172158.m2HLwPSI021438@apollo.backplane.com> Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: 8bit Message-Id: Cc: jgordeev@dir.bg, "Andrey V. Elsukov" , Robert Watson , freebsd-hackers@freebsd.org Subject: Re[6]: vkernel & GSoC, some questions X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Igor Shmukler List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Mar 2008 07:34:37 -0000 Matt, We use VMWare Server at work. It does not have the same nice image management interface and/or video capture as commercial counterparts. However, it is is free and testing on it helps us out big time. We never concluded whether it maked sense to pay for VMWare licenses, instead of using free shell scripts legally available for free. I have used UML for development in the past. I even used bochs once to debug a boot loader. All nice tools. Beats real hardware for me. Xen and KVM are significantly slower than commercial products due to hardware switching. There is a GPLed product that works about as fast as VMWare's BT - VirtualBox by innotek. Sun recently scooped them up. Don't you use something like VMWare for development and debugging? In production, we don't use any of these products - too slow and too much RAM would be required. Sincerely, Igor Shmukler, http://www.elusiva.com -----Original Message----- From: Matthew Dillon To: Igor Shmukler Date: Mon, 17 Mar 2008 14:58:25 -0700 (PDT) Subject: Re: Re[4]: vkernel & GSoC, some questions > > > : > :Matt, > : > :You sure won't argue that UML isolation is inherently better than one that can be provided by a hypervisor. If the performance is the same, what are you gaining? > : > :Hypervisor while slow, allows treating a complete OS with all applications as a black box. Why would I choose UML over a hypervisor? > : > :I am not trying to say there cannot be a place for vkernel. [I don't even yet understand what is does or how.] However, as a hosting company, why would I choose UML over a hypervisor? > : > :... > : > :igor > > Well, whos hypervisor are you using? > > -Matt > Matthew Dillon >