Date: Tue, 1 Dec 2009 19:22:28 -0800 From: "K. Macy" <kmatthew.macy@gmail.com> To: Josh Carter <josh@multipart-mixed.com> Cc: freebsd-xen@freebsd.org Subject: Re: FreeBSD Xen domU ? Message-ID: <F60223E1-5FFB-4965-BFDF-95038AFED0CC@gmail.com> In-Reply-To: <AAFEDBFE-9B7E-499C-B9AE-D12CBD2BFA22@multipart-mixed.com> References: <4AEF23FE.90604@gladserv.com> <d763ac660911030123n7e4de1f0l7b9fa0e125c49c2@mail.gmail.com> <4AF02B06.8090209@gladserv.com> <1258276895.3614.15.camel@glow> <4B0043B5.20601@tenebras.com> <A559C5D2-FF26-42AA-8402-5FFA26FFE8DF@gmail.com> <fc167c7e0912010337g51e63758yff9ee2d90cdb34ac@mail.gmail.com> <AAFEDBFE-9B7E-499C-B9AE-D12CBD2BFA22@multipart-mixed.com>
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On Dec 1, 2009, at 8:35 AM, Josh Carter wrote: > Hi all, >=20 > On Dec 1, 2009, at 4:37 AM, Luke Marsden wrote: >=20 >> Thanks for your reply. I'll see what I can do about getting the = precise >> version (which I believe is indeed 3.0.3) and patches for you. Amazon = say on >> http://aws.amazon.com/ec2/ that "we work with our partners and = community to >> provide you with the most choice possible. You are also empowered to = use our >> bundling tools to upload your own operating systems"... so I'll = attempt to >> hold them to that :) >=20 > I've been in contact with Jeff Barr at Amazon over the past couple = months and he's trying to put me in contact with an "appropriate = technical resource" to support FreeBSD efforts toward a EC2-compatible = system. >=20 > Right now my company has a full-time expert working on FreeBSD on Xen, = but our focus is initially IO performance. We're running 64-bit HVM with = PV drivers. Given that Amazon runs Windows on EC2 they should have the = ability to run HVM, but the preferable solution is PV. I don't know when = PV will become a priority for somebody; for us (and some others I know) = it wouldn't matter until IO runs a lot faster. >=20 > In any case, help from Amazon would be welcome. There are a number of = companies interested in FreeBSD on Xen in various configurations, and = efforts from any party benefit everyone else. Scott Long re-wrote blkfront, I have since updated the copyright and = merged it in to HEAD. There is an extension to busdma that you may need, = depending on file system consumer. It doesn't perform much better on = random I/O due to design issues with blkback. We've debated re-writing = linux's blkback versus simply moving all I/O to a driver domain and = letting freebsd take care of it. -Kip=
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