What kind of roles are there in the Cloud?
In the middle Cloud Provider, which is the organization or corporation providing the service to the cloud users
At bottom Cloud Carrier is the organization or a company-ISP or Telecom- which carries services from Cloud providers to Cloud users..
Cloud Auditor who is evaluating performance and security issues for cloud service. Should be independent organization or a company like CSA-cloud security alliance.
Between users and providers or between providers Cloud Broker via using cloud services does arbitrage work. Cloud Broker may combine different services from different provider and present cloud services as a turn-key solution. This solution provides central control and eases federation and integration.
Cloud User Who uses the services provided by Cloud Provider.