Like many things in life, roots of cloud computing lie elsewhere and it they can be traced back to: Grid computing. Grid Computing paved the way for the evolution of cloud computing. The concept of Cloud computing has origins in Grid computing that provides rapid provisioning of resources
Grid computing approach starts with the splitting of the silos by inserting an additional layer on each server included in the Grid. The principal function of this additional layer is to create logical servers that distribute over different physical servers the computational needs such as jobs and tasks required by different applications which they are virtually executing. In this manner, it is possible to decouple the applications from the physical systems or resources on which they are running. It is also possible to dynamically add or remove the computational power of logical servers as per the demands of application.
This concept of “ decouple” is the basis of “ virtualization” and cloud computing paradigm
