A look at cloud architecture interoperability through standards

Enabling cloud infrastructures to evolve into a transparent platform while preserving integrity raises interoperability issues. How components are connected needs to be addressed. Interoperability requires standard data models and communication encoding technologies compatible with the existing Internet infrastructure. To reduce vendor lock-in situations, cloud computing must implement universal strategies regarding standards, interoperability and portability. Open standards are of critical importance and need to be embedded into interoperability solutions. Interoperability is determined at the data level as well as the service level. Corresponding modelling standards and integration solutions shall be analysed

A Review Of Multi-Tenant Database And Factors That Influence Its Adoption.

A Multi-tenant database (MTD) is a way of deploying a Database as a Service (DaaS). This is gaining momentum with significant increase in the number of organizations ready to take advantage of the technology. A multi-tenant database refers to a principle where a single instance of a Database Management System (DBMS) runs on a server, serving multiple clients organizations (tenants). This is a database which provides database support to a number of separate and distinct groups of users or tenants. This concept spreads the cost of hardware, software and other services to a large number of tenants, therefore significantly reducing per tenant cost. Three different approaches of implementing multi-tenant database have been identified. These methods have been shown to be increasingly better at pooling resources and also processing administrative operations in bulk. This paper reports the requirement of multi-tenant databases, challenges of implementing MTD, database migration for elasticity in MTD and factors influencing the choice of models in MTD. An insightful discussion is presented in this paper by grouping these factors into four categories. This shows that the degree of tenancy is an influence to the approach to be adopted and the capital and operational expenditure are greatly reduced in comparison with an on-premises solutio

Tenant-centric Sub-Tenancy Architecture in Software-as-a-Service

AbstractMulti-tenancy architecture (MTA) is often used in Software-as-a-Service (SaaS) and the central idea is that multiple tenant applications can be developed using components stored in the SaaS infrastructure. Recently, MTA has been extended to allow a tenant application to have its own sub-tenants, where the tenant application acts like a SaaS infrastructure. In other words, MTA is extended to STA (Sub-Tenancy Architecture). In STA, each tenant application needs not only to develop its own functionalities, but also to prepare an infrastructure to allow its sub-tenants to develop customized applications. This paper applies Crowdsourcing as the core to STA component in the development life cycle. In addition, to discovering adequate fit tenant developers or components to help build and compose new components, dynamic and static ranking models are proposed. Furthermore, rank computation architecture is presented to deal with the case when the number of tenants and components becomes huge. Finally, experiments are performed to demonstrate that the ranking models and the rank computation architecture work as design

Traditional security risk assessment methods in cloud computing environment: usability analysis

The term "Cloud Computing" has become very common in our daily life. Cloud computing has emerged with promises to decrease the cost of computing implementation and deliver the computing as service, where the clients pay only for what he needed and used. However, due to the new structure of the cloud computing model, several security concerns have been raised and many other security threats have been needed to be reevaluated according to the cloud structure. Besides, the traditional security risk assessment methods become unfit for cloud computing model due to its new distinguished characteristics. In this paper, we analysis the ability to assess the security risks in cloud computing environments

A survey on security issues and solutions at different layers of Cloud computing

Cloud computing offers scalable on-demand services to consumers with greater flexibility and lesser infrastructure investment. Since Cloud services are delivered using classical network protocols and formats over the Internet, implicit vulnerabilities existing in these protocols as well as threats introduced by newer architectures raise many security and privacy concerns. In this paper, we survey the factors affecting Cloud computing adoption, vulnerabilities and attacks, and identify relevant solution directives to strengthen security and privacy in the Cloud environment

Integration of different aspects of multi-tenancy in an open source enterprise service bus

The EU project 4CaaSt aims to create an advance PaaS Cloud platform which supports the optimized and elastic hosting of composite Internet-scale multi-tier applications. Cloud computing is essentially changing the way services are built, provided and consumed. Nowadays applications are composed out of multiple reusable services consisting of newly developed services as well as legacy applications made available as services. These services do not necessarily use the same protocols for communication. So a component for the mediation between various protocols, dynamic service selection and routing based on non-functional requirements is needed. Nowadays an Enterprise Service Bus (ESB) is used in Service-Oriented Architectures (SOAs) to serve precisely these objectives. One important aspect of bringing an ESB as building block into the Cloud is to enable multi-tenancy. This includes multi-tenant aware management and administration of the ESB as well as multi-tenant aware messaging. In this student thesis we design and implement the extensions of the ESB and the components needed for the integration and evaluation of two approaches to extend an open source ESB for multi-tenancy support: the first covers the multi-tenant aware administration and management and the second covers the multi-tenant aware messaging. Both approaches require the extension of the ESB, which implements the Java Business Integration (JBI). As a result, we provide an integrated prototype based on a scenario emerged from the EU project 4CaaSt and a performance's evaluation of the extended JBI Components in the ESB