Infrastructure-as-a-Service (IaaS) cloud platforms rent computing resources with different cost and availability tradeoffs. For example, users may acquire virtual machines (VMs) in the spot market that are cheap, but can be unilaterally terminated by the cloud operator. Because of this revocation risk, spot servers have been conventionally used for delay and risk tolerant batch jobs. In this pa...

By building Moodle learning environment in the cloud platform , and the design of teaching process of the corresponding with the author's teaching practice in Moodle from the cloud platform selection, learning environment to build and curriculum design, with adult education computer course as an example, the blended learning based on Moodle was discussed, the teaching practice shows that cloud ...

As different Cloud Management Frameworks and resource providers are settling in the market there is the need to grasp the interoperability problems present in current infrastructures, and study how existing and emerging standards could enhance user experience in the cloud ecosystem. In this paper we will review the current open challenges in Infrastructure as a Service cloud interoperability an...

Cloud Computing, i. e. providing on-demand access to virtualised computing resources over the Internet, is one of the current megatrends in IT. Today, there are already several providers offering cloud computing infrastructure (IaaS), platform (PaaS) and software (SaaS) services. Although the cloud computing paradigm promises both economical as well as technological advantages, many potential u...

Cloud computing is an emerging paradigm with three basic service models such as Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). This paper focuses on different kinds of PaaS frameworks. PaaS model provides choice of cloud, developer framework and application service. In this paper, detailed study of four open PaaS frameworks like AppScale, Clo...

Cloud computing refers to Internet based development and utilization of computer technology. It is a style of computing, in which dynamically scalable (and often virtualized) resources are provided as a service over the Internet. The concepts behind cloud computing incorporate Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS), and Infrastructure-as-a-Service (IaaS), respectively. In to...

This paper describes an approach for automated security analysis of network access controls in operational Infrastructure as a Service (IaaS ) cloud computing environments. Our objective is to provide automated and experimental methods to analyze firewall access control mechanisms aiming at protecting cloud architectures. In order to determine the accessibilities in virtual infrastructure netwo...

Infrastructure as a Service (IaaS) cloud provides resources as a service from a pool of compute, network, and storage resources. Cloud providers can manage their resource usage by knowing future usage demand from the current and past usage patterns of resources. Resource usage prediction is of great importance for dynamic scaling of cloud resources to achieve efficiency in terms of cost and ene...

The availability of powerful computing hardware in IaaS clouds makes cloud computing attractive also for computational workloads that were up to now almost exclusively run on HPC clusters. In this paper we present the VM-MAD Orchestrator software: an open source framework for cloudbursting Linux-based HPC clusters into IaaS clouds but also computational grids. The Orchestrator is completely mod...

When service providers move to IAAS Clouds, whether their service is delivered by a legacy application, either it has been developed by a deployable open platform, the provisioning and the management workflow of the computing infrastructure really changes. Here we describe a set of tools which can be used to orchestrate agents’ based services, which provide facilities for provisioning, manageme...