Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755364Ab0KHSLj (ORCPT ); Mon, 8 Nov 2010 13:11:39 -0500 Received: from serrano.cc.columbia.edu ([128.59.29.6]:61385 "EHLO serrano.cc.columbia.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753035Ab0KHSLi (ORCPT ); Mon, 8 Nov 2010 13:11:38 -0500 Message-ID: <4CD83DF4.4080009@cs.columbia.edu> Date: Mon, 08 Nov 2010 13:14:12 -0500 From: Oren Laadan Organization: Columbia University User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.15) Gecko/20101027 Lightning/1.0b1 Thunderbird/3.0.10 MIME-Version: 1.0 To: Gene Cooperman CC: Kapil Arya , Tejun Heo , ksummit-2010-discuss@lists.linux-foundation.org, linux-kernel@vger.kernel.org, hch@lst.de, Linux Containers Subject: Re: [Ksummit-2010-discuss] checkpoint-restart: naked patch References: <4CD26948.7050009@kernel.org> <20101104164401.GC10656@sundance.ccs.neu.edu> <4CD3CE29.2010105@kernel.org> <4CD5DCE3.3000109@cs.columbia.edu> <20101107194222.GG31077@sundance.ccs.neu.edu> <4CD71A6B.3020905@cs.columbia.edu> <20101107230516.GJ31077@sundance.ccs.neu.edu> <4CD774CA.8030004@cs.columbia.edu> <20101108162630.GN31077@sundance.ccs.neu.edu> In-Reply-To: <20101108162630.GN31077@sundance.ccs.neu.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-No-Spam-Score: Local Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1594 Lines: 36 Hi, Ok, I'll bite the bullet for now - to be continued... Just one important clarification: >> Linux-cr can do live migration - e.g. VDI, move the desktop - in >> which case skype's sockets' network stacks are reconstructed, >> transparently to both skype (local apps) and the peer (remote apps). >> Then, at the destination host and skype continues to work. > > That's a really cool thing to do, and it's definitely not part of what > DMTCP does. It might be possible to do userland live migration, > but it's definitely not part of our current scope. But if we're talking > about live migration, have you also looked at the work of > Andres Lagar Caviilla on SnowFlock? > http://andres.lagarcavilla.com/publications/LagarCavillaEurosys09.pdf > He does live migration of entire virtual machines, again with very > small delay. Of course, the issue for any type of live migration is that > if the rate of dirtying pages is very high (e.g. HPC), then there is > still a delay or slow response, due to page faults to a remote host. VMware, Xen and KVM already do live migration. However, VMs are a separate beast. We are concerned about _application_ level c/r and migration (complete containers or individual applications). Many proven techniques from the VM world apply to our context too (in your example, post-copy migration). Oren. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/