Some time ago, categories of public cloud computing were established. First of all, a distinction was created on who owned the cloud, with private (it is yours), hybrid (you are renting it, but not sharing it with anyone), and public (you are renting it, and you are sharing the infrastructure with an unknown number and type of other entities) having been defined. Then we created Infrastructure-as-a-Service – IaaS (a service consisting of either the container for the OS, or the container and the OS in it), Platform-as-a-Service – PaaS (a service consisting of IaaS plus all of the application services (web server, application server, database server, and language run times) that an application needs, and Software -as-a-Service – SaaS (the entire application is delivered over the Internet, typically by the application vendor (SalesForce.com being a good example). Continue reading Are We Missing a Category of Cloud Computing?
Bernd Harzog recently wrote about Microsoft’s Three Pronged Windows Azure Strategy – particularly with reference to the Service Provider offering. I’ve now had a certain amount of time to reflect on the announcement and try and work out what is going on and it doesn’t seem to constitute a wholehearted strategy to put resellers on a level playing field with Microsoft. Continue reading Azure and Service Providers
Organizations practicing agile development face many decisions when moving to the cloud. None is bigger than choosing whether to use IaaS or PaaS solutions for developing and deploying their applications. While each organization’s requirements are unique, there are 10 key criteria that can greatly influence an organization’s cloud strategy. Continue reading IaaS or PaaS: 10 Keys for your Cloud Strategy
On June 26, Red Hat announced a new version of OpenShift, and pricing for a future production offering (some time this year). You still can’t buy it but if you were able to buy it you’d know exactly how much it could cost – at least if you could work out what a “gear” is. Pricing allows us to start to compare it more meaningfully with other offerings. However rather than comparing with another PaaS offering, we think most people will be actually considering IaaS as an alternative, so we are going to do that comparison instead.
There has been quite a lot of twitter traffic about the FrankenCloud recently: A cloud with more than one type of hypervisor underneath it. One example, is to build a cloud using Hyper-V three and vSphere, both managed through Microsoft System Center. Another example, is to build a cloud using Hyper-V, KVM, and vSphere all managed through HotLink. But is this a desired cloud topology? Continue reading Enter the FrankenCloud: Or Do we really care about the Hypervisor?
There seems to be a myriad of definitions of who is a tenant when it comes to secure multi-tenancy. This debate has occurred not only within The Virtualization Practice as well as at recent Interop and Symantec Vision conferences I attended. So who really is the tenant within a multi-tenant environment? It appears multiple definitions exist and if we cannot define Tenant, then how do you build secure applications that claim to be multi-tenant? Continue reading Multi-Tenancy: Who is the Tenant?