The customer determines the ultimate purpose of the processing and decides on the outsourcing or the delegation of all or part of the concerned activities to external organizations. Therefore, the customer acts as a controller.
When the service provider supplies the means and the platform, acting on behalf of the customer, it is considered to be a data processor.

Network, CPU and Disk(storage) are key subsystems in cloud environment that should be monitored.

Corporate governance is the system of rules, practices and processes by which a company is directed and controlled. Corporate governance, essentially involves balancing the interests of a company's many stakeholders, such as shareholders, management, customers, suppliers, financiers, government and the community.