Compelling method for managing Further foster System Execution and Cost Evaluation for Cloud

Abstract

Cloud Computing is assuming a relevant role in the world of web applications and web services. On the one hand, cloud technologies allow realizing dynamic system which are able to adapt their performance to workload fluctuations. On the other hand, these technologies allow eliminating the burden related to the purchase of the infrastructure, allowing more flexible pricing models based on the actual resource utilization. Last, but not least, is the possibility to completely delegate to the Cloud Provider intensive tasks as the management and the maintenance of the cloud infrastructure. Moreover, the usage of cloud systems can lead to relevant issues, which mainly derive from the lack of technology standards and from the intrinsic characteristics of such geographically distributed systems. For example, we can mention the lock-in effect related to the portability of cloud applications, the problem of data location and data security, the lack of interoperability between different cloud systems, the problem of performance and cost estimation.

This paper is focused on the problem of performance and cost estimation of cloud system at IaaS (Infrastructure-as-a-Service) and PaaS (Platform-asa- Service) level, which is crucial for service providers and cloud end users. These latter need valid comparison metrics, in order to choose whether or not to use cloud technologies and, above all, on which Cloud Provider they can rely. The derivation and the analysis of these metrics are not straightforward tasks, since cloud systems are geographically distributed, dynamic and therefore subject to high variability.