Business software is increasingly moving from a traditional on-premises deployment model to a Software as a Service deployment model. In a Software as a Service deployment model, the possession and ownership of the software application is separated from its use. The software is hosted by a Software as a Service provider, relieving the customer organization from the responsibility for supporting...

Multi-tenant applications come into existence in clouds, which aims “better resource utilization” for application provider. Today most of the present application optimizations are based on Service Level Agreements which focuses on virtual machine (VM) based computing service, while other services such as storage and cache are often neglected. This paper mainly focuses on cache based approach fo...

Cloud environments reduce data center operating costs through resource sharing and economies of scale. Infrastructure-as-a-Service is one example that leverages virtualization to share infrastructure resources. However, virtualization is often insufficient to provide Software-as-aService applications due to the need to replicate the operating system, middleware and application components for ea...

Cloud computing is a trend of technology aimed at providing on-demand services with payment based on usage. To improve the use of resources, providers adopt multi-tenant approaches, reducing the operation costs of services. Moreover, tenants have irregular workload patterns, impacting in the guarantees of quality of service, mainly due to interference between the tenants. This paper proposes an...

The concept of a multi-tenant database cluster offers new approaches in implementing a data storage for cloud applications. One of the most important questions to solve is finding a load-balancing algorithm to be used by the cluster, which is able to effectively use all available resources. This paper discusses theoretical foundations for such an algorithm in the simplest case when the flow of ...

In this report, we give an overview of multicommodity aggregative models of resource management by both tenants and public, neutral clouds. A tenant will use an estimate of a near-future net valuation to make decisions regarding IT resource1/VM procurement [1], load balancing, or demand response. Models of uncertainty in the required resources and of statistical multiplexing are given. We study...