it is not my currently interest but I know that map-reduce is a good tool in cloud computing in addition to network simulations such as NS2 and Matlab

You can use CloudSim tool. This tool you can use by eclipse. This is mostly used by researchers to simulate his work. For more detail, you can visit  www.cloudbus.org/cloudsim/ here you can find clousim tool and videos 

Hi,you can use cloudsim(eclipse).

u can use ibm bluemix is best one

CloudSim is appropriate for load balancing experiment.

You can use CloudSim tool

As mentioned in above, CloudSim toolkit is the best tool for simulating cloud infrastructure

CloudSim toolkit is the best option. while Riverbed is  the best for convectional networks