In this paper, authors describe main characteristics of IssS tools including Eucalyptus, OpenNebula and Nimbus. Those are three major
open-source cloud-computing software platforms. FutureGrid has been managing a science cloud based on Eucalyptus.
I also have been building a test-bed based on Eucalyptus that is used for evaluating a MapReduce testsuite running on Haoop and Twister.
Why I chose Eucalyptus as a tool of IaaS is as follows: