On this rare occasion (;o)), I fully agree with Sam. The "I" in IaaS includes compute, storage and network resources and the "drivers" thereof - which means domain managers with appropriate interface to provision, configure, monitor and meter them ... Cheers <k/> From: occi-wg-bounces@ogf.org [mailto:occi-wg-bounces@ogf.org] On Behalf Of Sam Johnston Sent: Sunday, June 14, 2009 6:45 AM To: Gary Mazz Cc: occi-wg@ogf.org Subject: Re: [occi-wg] Opinion Poll: IaaS or PaaS ? On Sun, Jun 14, 2009 at 1:35 PM, Gary Mazz <garymazzaferro@gmail.com> wrote: The question is: " Do operating systems belong in IaaS or PaaS. " Definitely IaaS. When you start talking about MAC addresses, VLAN IDs, etc. you're venturing well into the underlying hardware fabric which is ultimately someone else's problem - I don't see any of these things appearing in current IaaS APIs[1]. Basically think of infrastructure services as everything up to the operating system interface (be that an API, CLI or a GUI). Platform services (PaaS) on the other hand include [most of] the solution stack... any app servers, databases, script/bytecode interpreters, etc. - think LAMP. You can just take your app and use it (in many was like it were a virtual machine - which is why the next step for us will be a small one). Software services (SaaS) then add the application itself. OCCI is most definitely IaaS. Sam 1. That is not to say they're not important - they are, particularly for "I can't believe it's not cloud" moreso than public cloud, but if they appear in OCCI they'll be optional.