Utility hmm the term we have already heared many times but out-side computer domain. for example: utility bills 🙂 for Electricity, Gas, Water and Air (Thanks God Air is still free for our lungs ).
So now what is Utility computing ? in plain words
Like in rest of Utilities you pay what you used and you scale up and down according to need – That’s Simple
The Amazon said on their EC2 page as
What makes Amazon EC2 different is that you use only the capacity that you need. This eliminates your need to make large and expensive hardware purchases, reduces the need to forecast traffic, and enables you to immediately deal with changes in requirements or spikes in popularity related to your application or service.