A Survey on Quality of Service Implementations in Cloud Computing

Cloud computing is a new terminology achieved by distributed, parallel and grid computing and a design pattern for large, distributed data centers. Cloud computing offers end customers a pay as go model. Quality of service plays an important factor in distributed computing. Cloud computing provides different types of resources like hardware and software as service via internet. Under cloud computing, computing resources are hosted in the internet and delivered to customers as services. Prior to that, the customers and cloud provider negotiate and enter into an agreement named service level agreement. The service level agreements clarify the roles, set charges and expectations and provide mechanisms for resolving service named problems within a specified and agreed upon time period. Service level agreements also cover performance, reliability conditions in terms of quality of service guarantees. In this paper, the authors present a comprehensive survey on quality of service implementations in cloud computing with respect to their implementation details, strengths and weaknesses.