Remember when the cloud was the new big thing? Then private clouds where all the rage. Now we are inundated with talk of hybrid clouds which combine private and public clouds into one unified system.
Before we talk about why hybrid clouds sound so great, we should touch on why private clouds are so compelling. With the help of server virtualization, you take your own infrastructure and make it cloud-like – basically turn it into a utility. But you control the whole thing and, because it is local, you have full control of its performance.
The problem is that as demand grows you have to scale up the private cloud by adding more resources – even if you only need those resources every now and again. At the same time, there are services you want in the easy-access public cloud (because users can get to the cloud from anywhere) but you still want these applications and data linked to your on-premises applications.