Application-level multi-tenancy is an increasingly prominent architectural pattern in Software-as-a-Service (SaaS) applications that enables multiple tenants (customers) to share common application functionality and resources among each other. This has the disadvantage that multi-tenant applications are often limited in terms of customizability: one application should fit the needs of all custo...

Cloud computing promotes multi-tenancy for efficient resource utilization by sharing hardware and software infrastructure among multiple clients. Multi-tenant applications running on a cloud infrastructure are provided to clients as Software-as-a-Service (SaaS) over the network. Despite its benefits, multi-tenancy introduces additional challenges, such as partitioning, extensibility, and custom...

In order to easily convert existing application to multi-tenant Software as a Service model, a Java migration platform is proposed. Firstly, the existing application is embed into the conversion platform and the single-tenant database was transformed to multi-tenant database by database transformation function. Secondly, each tenant’s operation and data access was isolated in business and datab...

A multi-tenant application in Software as a Service (SaaS) is accessed by multiple organizations called tenants who have several users attached to them. Multi-tendency enhances resource utilization by effectively sharing resources and reducing cost, increasing productivity and online collaboration. However, providing a secure multi-tenant access to various tenants is still a challenge. Traditio...

A multi-tenant database is the primary characteristic of SaaS, it allows SaaS vendors to run a single instance application which supports multiple tenants on the same hardware and software infrastructure. This application should be highly customizable to meet tenants’ expectations and business requirements. This paper examined current solutions on multi-tenancy, and proposed a new meta-data dri...

Accurately predicting response times of service queries is necessary for deployments optimisation in the multi-tenant applications system. This task is particularly challenging owing to the fact that the mixes of tenants with different business scale and operating characteristics and the interaction among the concurrently running queries have a great impact on the response time of queries in th...

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...

Provenance-based Access Control (PBAC) has recently risen as an effective access control approach that can utilize readily provided history information of underlying systems to enhance various aspects of access control in a computing environment. The adoption of PBAC capabilities to the authorization engine of a multi-tenant cloud Infrastructure-as-a-Service (IaaS) such as OpenStack can enhance...

Software architects struggle to choose an adequate architectural style for multi-tenant software systems. Bad choices result in poor performance, low scalability, limited flexibility, and obstruct software evolution. We present a comparison of 12 Multi-Tenant Architecture (MTA) patterns that supports architects in choosing the most suitable architectural pattern, using 17 assessment criteria. B...