• J.Vijayashree
• J.Jayashree

Cloud Computing could be a new delivery model for IT services supported net protocols. It usually involves provisioning of dynamically climbable and sometimes virtualized resources at the infrastructure, platform and software system levels. It addresses completely different fundamentals like virtualization, measurability, ability, quality of service and failover mechanism .Cloud atmosphere differs from ancient environments on the very fact that it is massively climbable, is encapsulated as associate abstract entity that delivers completely different levels of services to customers outside the Cloud, is driven by economies of scale, is dynamically organized (via virtualization or different approaches) and is delivered on demand. Among different models, cloud environments are public, non-public or hybrid. A public cloud (a.k.a. external cloud) could be a cloud that gives cloud resources and services to the general public. a personal cloud (a.k.a. internal cloud) is associate enterprise in hand or hired cloud. In general, a hybrid cloud could be a composition of 2 or additional clouds of various models. Nonetheless, we define a hybrid cloud as a composition of 1 public cloud and one non-public cloud. Such a cloud is associate atmosphere during which associate enterprise has its own non-public cloud that gives and manages some internal resources and solely uses external resources provided by the general public cloud once required.

Cloud, Quality of service, Interface, Optimization.

"MULTI-CLOUD PERFORMANCE AND WORKFLOW MANAGEMENT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.107-114, May 2019, Available :http://www.jetir.org/papers/JETIRDA06020.pdf

"MULTI-CLOUD PERFORMANCE AND WORKFLOW MANAGEMENT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp107-114, May 2019, Available at : http://www.jetir.org/papers/JETIRDA06020.pdf