What is Public Cloud Infrastructure

Cloud computing is a paradigm that allows the flexible and on-demand provisioning of computing resources. For this reason, many institutions and enterprises have moved their data centers to the Cloud and, in particular, to public infrastructures. Unfortunately, an increase in the demand for Cloud results in resource shortages affecting both providers and consumers. With this factor in mind, Cloud service providers need Admission Control algorithms in order to make a good business decision on the types of requests to be fulfilled. Cloud providers have a desire to maximize the net income derived from provisioning the accepted service requests and minimize the impact of unprovisioned resources. This chapter introduces and compares Admission Control algorithms and proposes a service model that allows the definition of Service Level Agreements for the Cloud.