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This paper proposes a crowdsourcing system that can provide Internet streaming media companies with the ability to assess users' Quality of Experience (QoE) when they are watching the company's online video streaming at their residences. To validate the effectiveness of the system, a resident measuring device and crowdsourcing applications on users' end device are implemented with several scenario...
The energy consumption of Cloud computing continues to be an area of significant concern as data center growth continues to increase. This paper reports on an energy efficient interoperable Cloud architecture realized as a Cloud toolbox that focuses on reducing the energy consumption of Cloud applications holistically across all deployments models. The architecture supports energy efficiency at service...
The paper describes the creation of a novel cloud broker created to provide efficient cloud brokering services for a government organization in India — the BroCUR. The BroCUR works in a volunteer federated, distributed schema with control being executed using a combination of threshold based metrics and triggers which launch task migration. The novel aspect of the BroCUR is the inclusion of the human...
This research analyzes the performance of a distributed cloud broker in a live traffic scenario, utilizing a government owned private federated cloud. The paper explores the use case when a cloud broker assists the provisioning of services to geographically distributed data centers which have volunteered to federate and expose their utilization metrics to each other through the cloud broker. The experimental...
Analytical models enable accurate and quick assessment of performance metrics in network planning and system design. In wireless networks, the signal-to-interference-and-noise ratio (SINR) is of key importance since other metrics, such as throughput and capacity, strongly depend on the SINR. In this work, we characterize the SINR by a composition of log-normal random variables describing shadow fading...
The research analyzes the functioning of an Autonomic Cloud Broker (ACB) in a real life scenario utilizing a Federated Cloud Infrastructure. The paper analyzes two important use cases that exist while a Cloud Broker enables the provision of services from multiple cloud providers to simultaneously demanding cloud users. Varying, real time load conditions are generated in a live use case on a private...
When orchestrating highly distributed and data-intensive Web service workflows the geographical placement of the orchestration engine can greatly affect the overall performance of a workflow. Orchestration engines are typically run from within an organisations' network, and may have to transfer data across long geographical distances, which in turn increases execution time and degrades the overall...
Web applications and server environments hosting them rely on configuration settings that influence their security, usability, and performance. Misconfiguration results in severe security vulnerabilities. Recent trends show that misconfiguration is among the top critical risks in web applications. While effective at uncovering numerous classes of vulnerabilities, generic web application vulnerability...
Computer network has grown both in size and complexity with the advent of Internet. It facilitates easy access to vast store of reference materials, collaborative computing, and information sharing. However, this requires a secure interconnected world of computing where confidentiality, integrity, and availability of information and resources are restored. Traditionally, security mechanism is enforced...
Data centers are growing in size and complexity driven by trends such as cloud computing and on-line services. Such large data centers pose several challenges for system management. Key among them is anomaly detection which is required to monitor and analyze metrics across several thousands servers and across multiple layers of abstractions to detect anomalous system behavior. In practice, multiple...
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