R.Kanniga Devi , S.Sujan
Cloud computing is a paradigm of large scale distributed computing which is a repackaging of various existing concepts/technologies such as utility computing, Grid computing, Autonomic computing, Virtualization and Internet technologies. Cloud computing use the Internet technologies for delivery of resources ‘as a service’ to users on demand. As it is a developing technology, various issues such as security, energy management, resource provisioning, reliability need to be addressed. The objective of the work is to study a simulation toolkit known as CloudSim and some of the research works done to address some of the above mentioned issues using this toolkit. Most of the studies in Cloud rely on simulation based experiments, since using real cloud infrastructures such as Amazon EC2, Google are cost and time consuming tasks and also large number of cloud resources is required to achieve realistic results which is impractical for many researchers.