High-Performance Cloud Computing: A View of Scientific Applications

Scientific computing often requires the availability of a massive number of computers for performing large scale experiments. Traditionally, these needs have been addressed by using high-performance computing solutions and installed facilities such as clusters and super computers, which are difficult to setup, maintain, and operate. Cloud computing provides scientists with a completely new model of utilizing the computing infrastructure. Compute resources, storage resources, as well as applications, can be dynamically provisioned (and integrated within the existing infrastructure) on a pay per use basis. These resources can be released when they are no more needed. Such services are often offered within the context of a Service Level Agreement (SLA), which ensure the desired Quality of Service (QoS). Aneka, an enterprise Cloud computing solution, harnesses the power of compute resources by relying on private and public Clouds and delivers to users the desired QoS. Its flexible and service based infrastructure supports multiple programming paradigms that make Aneka address a variety of different scenarios: from finance applications to computational science. As examples of scientific computing in the Cloud, we present a preliminary case study on using Aneka for the classification of gene expression data and the execution of fMRI brain imaging workflow.Comment: 13 pages, 9 figures, conference pape

Testing as a Service on Cloud A Review

Software testing is an important part of software engineering life cycle. Software testing is a process used for evaluating an attributes or capability of program and makes sure that it meets the requirements. The application building techniques have changed and has adapted to newly emerging technology of cloud. Cloud computing has changed t he way of obtaining computing resources, and also has given a new direction to manage and deliver computing services, technologies, and solutions. Cloud computing not only brings new business opportunities, but also causes some majo r impacts on software testing and maintenance. Cloud computing creates an opportunity that offer s testing as a service (TaaS) for SaaS and Cloud s. This lead to a new phase shift in conventional testing thereby identifying new issues, challenges and needs in software testing, particular in testing Cloud s and Cloud - based applications. This paper gives a comprehensive view on Testing as a Service. Also a comparative view towards conventional testing and Cloud testing is also considered

The Refugee Problem: An International Legal Tangle

Change is constant and computing paradigm is no exception. It has witnessed major shifts right from centralized client server systems to widely distributed systems. This time the locus of change in the computing paradigm is moving towards virtualization, paving way to cloud computing. Cloud computing aims at providing computing services to its users as an utility. It allows its authenticated users to access a wide range of highly scalable computing capabilities and services via the internet on a pay-per-usage basis. Organisations not only view these benefits as cost-saving strategies, but also aim at improving the competitive advantages using cloud computing. Hence, this has given rise to a new horizon in IT/IS outsourcing. With a collaboration of cloud computing and outsourcing emerged a new concept called cloudsourcing. Cloudsourcing can be termed as the next generation outsourcing and the next phase of cloud computing promising benefits from both the areas. Cloudsourcing is outsourcing traditional business via the cloud infrastructure. Though there is pompous popularity surrounding this new technology, there is much hesitation in adopting it due to the inherent security issues. This paper discusses in detail the security issues and possible solution to the same. As this is a new concept, not much work is identified to be done in providing a set of guidelines to adopt cloudsourcing that are very specific to information security. This work intends to fill this aperture by building a set of well-defined information security guidelines, which can be termed as a novel. For this purpose, design science research method proposed by Hevner et al is used so as to accomplish this goal. Initially, a literature study is done after which an exploratory study comprising of interviews is done to gather qualitative data. The results of the exploratory interview is tested for correctness and evaluated based on an evaluation study comprising a survey based questionnaire. The analysis of the evaluation study results provides the final results. In such an attempt, the identified countermeasures to risks are classified into three groups namely, organisational, technical and regulatory and compliance guidelines. Hence the end results constituting the set of information security guidelines are classified into the above mentioned groups. This work is assumed to contribute to our understanding of information security in cloudsourcing and in supporting IT decision makers, IT project managers and security executives of organisations for a smooth and secure transition towards cloudsourcing their business

IaaS-cloud security enhancement: an intelligent attribute-based access control model and implementation

The cloud computing paradigm introduces an efficient utilisation of huge computing resources by multiple users with minimal expense and deployment effort compared to traditional computing facilities. Although cloud computing has incredible benefits, some governments and enterprises remain hesitant to transfer their computing technology to the cloud as a consequence of the associated security challenges. Security is, therefore, a significant factor in cloud computing adoption. Cloud services consist of three layers: Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). Cloud computing services are accessed through network connections and utilised by multi-users who can share the resources through virtualisation technology. Accordingly, an efficient access control system is crucial to prevent unauthorised access. This thesis mainly investigates the IaaS security enhancement from an access control point of view. [Continues.

MVC-based content management on the cloud

Cloud computing describes a new distributed computing paradigm for IT data and services that involves over-the-Internet provision of dynamically scalable and often virtualized resources. While cost reduction and flexibility in storage, services, and maintenance are important considerations when deciding on whether or how to migrate data and applications to the cloud, large organizations like the Department of Defense need to consider the organization and structure of data on the cloud and the operations on such data in order to reap the full benefit of cloud computing. This report describes a cloud adaptation of Model View Controller (MVC) software engineering architectural pattern and its effect on content management in the cloud. We propose an architecture that separates the model, view, and controller aspects of a document thereby allowing greater flexibility, portability, and interoperability for document objects.N6133904WX00137Approved for public release; distribution is unlimited