Software-as-a-Service (SaaS) is a type of cloud computing in which a tenant rents access to a shared, typically web-based application hosted by a provider. Access control for SaaS should enable the tenant to control access to data that are located at the provider based on tenant-specific access control policies. To achieve this, state-of-practice SaaS applications provide application-specific a...

Energy accounting plays a crucial role in optimizing data center energy efficiency. Nonetheless, in a multi-tenant data center, it is challenging to fairly account for nonIT energy on an individual tenant basis, because each non-IT system (e.g., power supply and cooling) is shared by multiple tenants and only the system-level non-IT energy consumption can be measured. Existing policies, e.g., p...

Application-level multi-tenancy is an architectural design principle for Software-as-a-Service applications to enable the hosting of multiple customers (or tenants) by a single application instance. Despite the operational cost and maintenance benefits of application-level multitenancy, the current middleware component models for multi-tenant application design are inflexible with respect to pr...

Software as a Service (SaaS) providers can serve hundreds of thousands of customers using sharable resources to reduce costs. Multi-tenancy architecture allows SaaS providers to run a single application and a database instance, which support multiple tenants with various business needs and priorities. Until now, the database management systems (DBMSs) have not had the notion of multi-tenancy, a...

We argue that there is a need for Multi-Tenant Customizable OLTP systems. Such systems need a Multi-Tenant Customizable Database (MTC-DB) as a backing. To stimulate the development of such databases, we propose the benchmark MTCB. Benchmarks for OLTP exist and multi-tenant benchmarks exist, but no MTC-DB benchmark exists that accounts for customizability. We formulate seven requirements for the...

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...

Traditional multi-user applications are designed to provide the same functional and non-functional responses to all the users. However, customers of the contemporary applications may have different expectations from the application. To design an application with the ability to meet diverse requirements of customers, is a recurring problem in various domains including software applications. This...

In an infrastructure as a service (IaaS) cloud, tenants want to receive reliable services and the cloud provider intends to reducing intra-network traffic in order to provide more services. Achieving the requirements of both sides is a challenging problem. Current tenant abstraction models cannot provide enough information for the cloud provider to optimize network traffic while satisfying reli...