Currently, collaboration is a major challenge in adopting cloud Infrastructure-as-a-Service (IaaS). Enterprise work-flow intrinsically mandates collaboration across its tenant boundaries as well as with associated organizations’ tenants in the cloud. In this paper, we investigate a Circle-of-Trust approach where tenants establish trust within a circle of tenants for the purpose of collaboration...

Semering builds and manages retail shopping malls in the southwestern United States. Each of its malls typically has 10-20 boutiques, music stores, restaurants, and other small tenants and one large “anchor” (e.g., a department store). Under the standard lease terms, the annual rental rates are fixed for ten years for both small and large tenants. Anchor tenants pay lower rates per square foot ...

Software as a Service (SaaS) is a new software delivery model in which pre-built applications are delivered to customers as a service. SaaS providers aim to attract a large number of tenants (users) with minimal system modifications to meet economics of scale. To achieve this aim, SaaS applications have to be customizable to meet requirements of each tenant. However, due to the rapid growing of...

Hierarchical multi-tenancy, which enables tenants to be divided into subtenants, is a flexible and scalable architecture for representing subsets of users and application resources in the real world. However, the resource isolation and sharing relations for tenants with hierarchies are more complicated than those between tenants in the flat Multi-Tenancy Architecture. In this paper, a hierarchi...

While today’s virtual datacenters have hypervisor based mechanisms to partition compute resources between the tenants co-located on an end host, they provide little control over how tenants share the network. ˆis opens cloud applications to interference from other tenants, resulting in unpredictable performance and exposure to denial of service attacks. ˆis paper explores the design space for a...

Nonprofit Management & Leadership, vol. 25, no. 1, Fall 2014 © 2014 Wiley Periodicals, Inc. Published online in Wiley Online Library (wileyonlinelibrary.com) DOI: 10.1002/nml.21110 Journal sponsored by the Jack, Joseph and Morton Mandel School of Applied Social Sciences, Case Western Reserve University. Authors’ Note: We gratefully acknowledge fi nancial support from the Aspen Institute Nonprof...

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In SaaS, most tenants rely on the service provider for data maintenance and computation. As tenants no longer possess their application and data locally, it is of critical importance for the tenants to ensure that their data are being correctly stored and maintained. However, the customized multi-tenants sharing storage mode makes it hard for tenants to guarantee their data integrity because mu...

The number of tenants that subscribe to and pay for a service, and the cost of the SaaS computing infrastructure are the main factors that drive service profitability. In many application domains tenants’ requirements for service vary. Service variability is the degree of the actual variability provided by the Service Provider over the variability required by the tenants for the service. With g...

As a key service model in cloud computing, SaaS applications are becoming increasingly popular. Multi-tenancy is a key characteristics of SaaS applications. Business processes play a key role in SaaS applications because of the composability and reusability of software services. This paper focuses on multi-tenants instance-intensive workflows system, in which workflows have a large number of in...