
300 C. Yang, Q. Huang, Z. Gui, Z. Li, C. Xu, Y. Jiang, and J. Li
cloud services is of great interest for consumers to take full advantage of
innovative technology. However, the lack of standards for cloud computing
interoperability has become a critical impediment that hinders cloud com-
puting evolution. Currently, cloud providers are using different imple-
mentation methods and interfaces. For example, Amazon uses Xen as the
hypervisor for its EC2 platform, while the virtualization of Windows Azure
is based on Hyper-V,
1
which was formerly known as Windows Server
Virtualization. These differences lead to many interoperability issues such
as ...