Service Level Agreement in cloud computing: An overview

Cloud computing is an internet based computing, providing the on demand services through the internet such as servers, storage disk, different platforms and applications to any business level company or organization. The cloud computing services are `Pay based on usage' based on the agreement between Service Provider of the Cloud and customer. Service Level Agreement(SLA) is a contract, contracted between provider of the service and the third party such as purchaser of service, dealer(agent) or monitor(agent), where service is formally defined. Practically the term Service Level Agreement(SLA) is used to mention the delivery period of the contracted service, and to evaluate the performance of service. The cloud computing is a recent technology providing numerous services for critical commercial applications, trustworthy and flexible mechanisms for managing the contracts. Therefore SLA is very important for conducting the cloud business in a smooth way. This paper presents an overview of SLA, benefits of cloud computing, the necessity of cloud computing, the importance of SLA, classification of Service Level Agreement, SLA-based cloud framework of cloud computing.