Information Technology Reference
The main features of CloudSim are following:
1. Support for modeling and simulation of large scale Cloud computing data centers;
2. A self-contained platform for modeling Clouds, service brokers, provisioning, and
3. Support for simulation of network connections among the simulated system ele-
4. Facility for simulation of federated Cloud environment that inter-networks re-
sources form both private and public domains.
Above these, the researchers can evaluate the hypothesis prior to a real deployment in
an environment with CloudSim, where one can reproduce tests, while they can also
test the new developmental methodologies and policies in cloud computing environ-
ment. CloudSim can bring us some benefits: (
) to test the performance of their
provisioning and service delivery policies in a repeatable and controllable environ-
ment free of cost; and (
) to tune the performance bottlenecks before real-world dep-
loyment on commercial Clouds.
WorkflowSim extends the CloudSim simulation toolkit by introducing the support of
workflow preparation and execution with an implementation of a stack of workflow
parser, workflow engine and job scheduler. It supports a multi-layered model of fail-
ures and delays occurring in the various levels of the workflow management systems.
The architecture of WorkflowSim is shown in Figure 1.
Failure Monito r
Fig. 1. WorkflowSim Overview. The area surrounded by dotted lines is supported by CloudSim.