An important basis for cloud computing are public IaaS cloud services as offered e.g. by Amazon, Rackspace, VmWare. Since IaaS cloud services are often used as a flexible infrastructure for SaaS cloud services, it is important to investigate IaaS cloud services as a basis to realise regulatory requirements in cloud computing, e.g the European Data Protection Directive and the E-Privacy Directiv...

Solving of tasks for Cloud Computing is impossible without maintaining of high availability level of Infrastructure as a Service (IaaS) Cloud. Several large IaaS Cloud providers try to solve this problem by means of increasing number of physical machines (PMs) in multiple pools. However, migrations of available PMs from one pool to another and also repairs, diagnostic instances of failed physic...

Open source IaaS is hot topic in cloud computing and every year a new IaaS with a different design is announced. This paper provides a closer look into three common IaaS; Eucalyptus, OpenStack & Nimbus. OpenStack is currently the best choice of public cloud providers due to its aim at standardization and scalability while Eucalyptus is more appropriate for private cloud deployments.

Security is an important concern to improve in emerging cloud computing to store, manage, analyze and share the sensitive data. Infrastructure as a Service (IaaS) is a provision cloud model attracting all business customers to use cloud by offering on-demand and pay-per-use hardware, storage, servers and other networking components. Present single cloud architectures are having numerous securit...

Infrastructure-as-a-Service (IaaS) is the most acceptable Cloud computing delivery model that IT managers are exploring as they relook at their IT infrastructure. Since the beginning of Cloud computing as a new and emerging paradigm, the field of Distributed Systems is amidst a stage of redefinition. Due to this, there are a wide variety of Cloud solutions, ranging from virtualization technolog...

The cloud architecture is usually composed of several XaaS layers—including Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). The previous work studies efficient resource allocation to optimize objectives of cloud users, IaaS provider and SaaS provider in cloud computing. This work proposes the composition of different layers in the cloud, such a...

Makespan minimization in tasks scheduling of infrastructure as a service (IaaS) cloud is an NP-hard problem. A number of techniques had been used in the past to optimize the makespan time of scheduled tasks in IaaS cloud, which is propotional to the execution cost billed to customers. In this paper, we proposed a League Championship Algorithm (LCA) based makespan time minimization scheduling te...

Results of researches in different areas of science and technique confirm that an effective route in order to solve important tasks is the possibility of migrating data resource within the cloud. Therefore Cloud Computing services including Infrastructure as a Service Cloud (IaaS Cloud) should have high availability level. It is serious problem, because even large cloud providers face with sudd...

IaaS clouds are major enablers of data-intensive cloud applications because they provide necessary computing capacity for managing Big Data environments. In a typical IaaS cloud, virtual machine (VM) instances deployed on physical machines (PM) are provided to the users for their computing needs. Recently, IaaS cloud providers are realizing that merely providing the basic functionalities for Bi...

Cloud Computing has caught the imagination of the CIOs across the world with rapid scalability being the most important feature of Cloud Computing, with very high degree of provisioning capability from the Cloud vendors in comparison to on premise IT infrastructure. It provides for the shift of spend from capital expenditure in IT budgets to a more flexible and manageable operating expenditure ...