Cloud Computing Simulator

https://www.researchgate.net/post/Which_is_the_best_simulator_for_cloud_computing

A short survey on the cloud simulation tools can be found in the following link.

http://www.slideshare.net/habibur01/survey-on-cloud-simulator

The following three simulators for cloud computing are open-source software, and can be downloaded and installed free of charge.

(1) CloudSim
http://www.cloudbus.org/cloudsim/

The primary objective of this project is to provide a generalized, and extensible simulation framework that enables seamless modeling, simulation, and experimentation of emerging Cloud computing infrastructures and application services. By using CloudSim, researchers and industry-based developers can focus on specific system design issues that they want to investigate, without getting concerned about the low level details related to Cloud-based infrastructures and services.

Rodrigo N. Calheiros, Rajiv Ranjan, Anton Beloglazov, Cesar A. F. De Rose, and Rajkumar Buyya, "CloudSim: A Toolkit for Modeling and Simulation of Cloud Computing Environments and Evaluation of Resource Provisioning Algorithms," Software: Practice and Experience (SPE), Volume 41, Number 1, Wiley Press, New York, USA, January 2011, pp. 23-50. 

(2) GreenCloud 
http://greencloud.gforge.uni.lu/index.html

Greencloud is a sophisticated packet-level simulator for energy-aware cloud computing data centers with a focus on cloud communications. It offers a detailed fine-grained modeling of the energy consumed by the data center IT equipment, such as computing servers, network switches, and communication links.

D. Kliazovich, P. Bouvry, and S. U. Khan, "A Packet-level Simulator of Energy- aware Cloud Computing Data Centers," Journal of Supercomputing, vol. 62, no. 3, 2012, pp. 1263-1283.

(3) iCanCloud
http://www.arcos.inf.uc3m.es/~icancloud/Home.html

iCanCloud is a simulation platform aimed to model and simulate cloud computing systems, which is targeted to those users who deal closely with those kinds of systems. The main objective of iCanCloud is to predict the trade-offs between cost and performance of a given set of applications executed in a specific hardware, and then provide to users useful information about such costs. 

Alberto Núñez, Jose L. Vázquez-Poletti, Agustin C. Caminero, Gabriel G. Castañé, Jesúus Carretero and Ignacio M. Llorente "iCanCloud: A Flexible and Scalable Cloud Infrastructure Simulator," Journal of Grid Computing, Volume 10, Number 1, 2012, pp.185-209.