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Stefan T. Ruehl, Urs Andelfinger, Andreas Rausch, A.W. Verclas

Who may share with Whom?! Mixed-Tenancy: Conditional Sharing of Cloud Resources


Software-as-a-Service is a delivery model whose basic idea is to provide
applications to the customer on demand over the Internet. SaaS thereby promotes
multi-tenancy as a tool to exploit economies of scale. This means that a single application
instance serves multiple customers. However, a major drawback of SaaS is
the customers’ hesitation of sharing infrastructure, application code, or data with other
tenants. This is due to the fact that one of the major threats of multi-tenancy is information
disclosure due to a system malfunction, system error, or aggressive actions. So
far the only approach in research to counteract on this hesitation has been to enhance
the isolation between tenants using the same instance. Our approach (presented in earlier
work) tackles this hesitation differently. It allows customers to choose if or even
with whom they want to share the application. The approach enables the customer
to define their constraints for individual application components and the underlying
infrastructure. Based on these constraints, the SaaS application is deployment in the
way that all constraints are satisfied and only minimal resources are required.
This paper’s contribution is a summary of all results that were developed during the
creation of the mixed-tenancy approach. These results focus on the challenges of capturing
customers’ deployment constraints, computing a valid and optimal deployment,
and an evaluation of the general applicability of mixed-tenancy in real-world.


INFORMATIK 2014: Big Data - Komplexität meistern







Who may share with Whom?! Mixed-Tenancy: Conditional Sharing of Cloud Resources

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