Abstract
Cloud Computing is the most attracting keyword for distributed processing using networking, High Performance Computing Infrastructure (HPCI), and Web technologies on the Internet of recent years. Cloud users can get scalable services remotely through the Internet. There are various kind of cloud services in the world, the services provided to users and technologies deployed in the clouds are of great variety. Especially in cloud services the service, called Infrastructure as a Service (IaaS), provides Virtual Machine (VM) to users by the minute or by the amount. The service are utilized as an infrastructure for large scale and busy web sites and applications.
In this paper the structure and required element technologies of common IaaS are described, then the technologies of management software for IaaS clouds are also described. Moreover, the case example of composing a large scale distributed IaaS cloud is described. Through the experience, this paper shows the current status of IaaS clouds and problems for more reliability.
