Hi, Well both Xen and VMware have scaling issues when it comes to I/O. But that's really not too surprising given how poorly I/O is designed on x86 servers to begin with. Not to mention the use of LInux underneath doesn't help the situation much.
As for cloud providers, there are actually a lot of "Enterprise" grade cloud providers that use VMware because of the feature set, manageability, and ISV support.. not to mention the warm fuzzies clients get. Good examples would be ATT, Verizon, IBM, HP, CSC, Savvis, Terremark, etc. They all use VMware. Expect to see more of this considering the direction VMware is going. Although an interesting note, Amazon is adopting Oracle VM for their Oracle PaaS offering. So I'm sure we'll see more of Oracle VM popping up as Exadata and Exalogic are used by cloud providers. *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Octave J. Orgeron Solaris Virtualization Architect and Consultant Web: http://unixconsole.blogspot.com E-Mail: unixcons...@yahoo.com *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* ----- Original Message ---- From: Luke S Crawford <l...@prgmr.com> To: Octave Orgeron <unixcons...@yahoo.com> Cc: matth...@pfuetzner.de; Joerg Schilling <joerg.schill...@fokus.fraunhofer.de>; bderzhav...@yahoo.com; xen-disc...@opensolaris.org; opensolaris-discuss@opensolaris.org Sent: Thu, October 14, 2010 6:15:57 PM Subject: Re: [osol-discuss] [xen-discuss] XEN on OpenIndiana Octave Orgeron <unixcons...@yahoo.com> writes: > Well I don't think Xen is a good enough hypervisor anyways. I would rather > see > Oracle come up with something better. There are too many Xen implementations >and > > not enough features to differentiate them other than GUI's. Even Red Hat has > realized this and are pushing their KVM agenda. Now, I'll be shortly much more educated on this subject, but last time I looked, KVM simply wasn't up to the same load as Xen. You can easly drop 100+ guests on a 8 core/32GiB ram box with xen, and the problem you hit is that sharing disk sucks. my understanding is that kvm falls over before that. Anyhow, I just bought a (much smaller) competitor who does KVM, so I'm about to get a crash course on how it fares in production. And sadly when people talk about > virtualization on x86, it's always a VMware discussion with Citrix Xen and MS > Hyper-V looked at as oddball alternatives. Red Hat, Oracle, Novell, etc > aren't > even in the discussion. If you talk about /enterprise/ virtualization, sure. If you are trying to consolidate 5 year old servers on to newer boxes and have a nigh unlimited budget, your needs are rather different. But if you talk about the hosting market, "the cloud" etc... open-source xen is the only game in town. I know of one serious competitor who uses KVM, and they are japanese-only, so for all I know I'm mistranslating something. ec2 uses xen, so does linode, slicehost, grockthis.net, and just about anyone else you'd seriously consider hosting a production app on. The second most popular platform is OpenVZ (but really, I say that's a different market and should be treated as such.) -- Luke S. Crawford http://prgmr.com/xen/ - Hosting for the technically adept http://nostarch.com/xen.htm - We don't assume you are stupid. _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
