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Cloud computing is an evolutionary model for distributed computing, which consists of centralized data centers providing resources for massive scalable computing. Major security challenges are the generation, distribution, and usage of encryption keys in cloud systems. One of ways to provide security, proxy re-encryption scheme is proposed, in which a semi-trusted proxy transforms a cipher-text for...
Modern websites consist of many rich objects dynamically produced by servers and client terminals at diverse locations. To deliver dynamic objects efficiently, edge computing in which objects are dynamically generated and delivered to client terminals on edge servers located at edge nodes will be effective. It is anticipated that the effectiveness of edge computing depends on the geographical pattern...
Data of any organization increases day by day and emergence of different technologies brings challenge in maintenance and security of data. Data isolation in SaaS application needs a different approach to manage it. It requires a approach which assures isolation with low cost ownership. It should also maintain high quality security mechanism to protect it. New approach different than traditional approaches,...
This paper covers the importance of performance testing of web applications and analysing the application's bottleneck based on hardware, software and resource utilization. Mainly, the focus would be to performance test the application on different parameters like load, stress, scalability, reliability, security and capacity front. Now a days everyone expects everything to be very fast but at the...
The energy cost of large-scale datacenters is increasing rapidly as a result of the rising demands of user and application computation and transactions. A datacenter is expected to serve clients' requests and satisfy their constraints at a minimum cost and maintain the best performance according to the needs. To satisfy different requirements efficiently, there is a need to develop and evaluate efficient,...
We see a trend to design services as a suite of small service components instead of the typical monolithic nature of classic web services, which led to an increasing amount of long-tail services on the Internet. Deploying instances everywhere to achieve a fast response time results in high costs, especially when these services are used infrequently and remain idle most of the time. One way to avoid...
Service-Oriented Architectures can experience a highly diversified and complex set of interactions between web services for them to compute a response to an incoming service request. Existing approaches based on modelling and control theory are good for strategic and long-term development of a data center resource dimensioning necessary to respond within the boundaries of Service Level Agrements....
Hubs and switches have been actively used devices in computer networks vision, over two (2) decades. As results, numerous approaches have been used with varying degrees of success to evaluate the performances of these devices in computer networks. A class of approach that has shown substantial promise is one that gives clear and predictive results regarding the numbers of workstations, servers and...
Scalable, high performance, and fault-tolerant distributed applications are realized with virtual machines in server cluster systems. Application processes are performed on virtual machines in each server. Processing load of virtual machines to perform application processes has to be balanced in a server cluster system to satisfy the application requirements like response time. On the other hand,...
To build conversational robots, roboticists are required to have deep knowledge of both robotics and spoken dialogue systems. Unlike using stand-alone speech recognition/ synthesis toolkits, a cloud robotics platform for human-robot communication enables high-quality speech recognition and synthesis that is optimized to human-robot interactions. This is challenging because we need to build a wide...
Cloud Computing is an emergent area in the field of Information Technology having the Internet as its base and provides various services as utility and follows pay-as you-go model. Load balancing is a critical issue in cloud computing which is a technique that uses multiple nodes and distributes dynamic workload among them so that no single node is overloaded and ensures none of the system collapse...
Model based performance gives an efficient support for controlling the quality of service (QOS) as well as the cost of enterprise application. The two important quality measures are service availability and response time in cloud perspective. Though the expensive high decision monitoring probabiliy necessary to identify key model parameter, such as CPU utilization of particular request that are commonly...
In order to provide augmented reality services, vast amounts of various forms of information are required, which can then be dispersed on multiple servers on the Internet. Thus, when a server does not have proper information for a certain request from a user device, it is better to pass the request to another server with the penalty of a longer response time. This paper proposes a method to reduce...
The paper formulates methods to measure the trustworthiness of a network system S under hostile environment conditions incident on S. How good is the system S in meeting the QoS expectations of applications (i.e., the QoS capability of S) is quantitatively measured — say, on a [0, 1] scale. We employ model-based assessment tools (e.g., PO-MDP) to benchmark the QoS capability by stress-testing S with...
The amount of services located in the network has drastically increased over the last decade which is why more and more datacenters are located at the network edge, closer to the users. In the current Internet it is up to the client to select a destination using a resolution service (Domain Name System, Content Delivery Networks). In the last few years, research on Information-Centric Networking (ICN)...
The amount of services located in the network has drastically increased over the last decade which is why more and more datacenters are located at the network edge, closer to the users. In the current Internet it is up to the client to select a destination using a resolution service (Domain Name System, Content Delivery Networks). In the last few years, research on Information-Centric Networking (ICN)...
A new comprehensive optimization model based on queueing theory is proposed for resource allocation in cloud computing. Response time reliability is considered in our proposed model, which is proved to be essential through our case study. Using our optimization model, the optimal resource allocation of cloud computing strategy is achieved by minimizing the energy with the constraints of average response...
This paper surveys the literature to reveal the communication patterns associated with cloud computing. The literature includes a number of studies that although are not specific to cloud computing do provide insight into one class of communication for cloud computing: the communication between cloud clients (CCs) and cloud service provider (CSP) facilities. In addition, a few studies focus on the...
The paper focuses on the video publishing on the rented server. When the publisher publishes pre- recorded videos, he has to select a server from many server services in the Internet. In order to allow publishers themselves to select the optimal rented server (with the fastest response) in the Internet to publish the pre-recorded video, some indicators for selection are required. This study first...
We investigate how to manage an interactive service, where response time is a critical performance metric, to maximize the benefits of green energy produced from variable sources such as solar and wind. Specifically, we design, prototype, and evaluate a distributed structured storage system, GreenCassandra, which is representative of a class of important subsystems underlying many interactive cloud...
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