Application designers are faced with a series of design decisions when considering the number of available cloud services that can be used nowadays to host one or more parts of the application. Each one of these services comes with a different pricing ...

The cloud computing platform provides an efficient and flexible way to offer services and computation facilities to users. However, reliability in the cloud is an important factor to measure the performance of a virtualized cloud computing platform. ...

This paper describes a provenance-based access control system for the cloud. The system relies on provenance (PROV-DM, PROV-O) and access-control models (RBAC) together with a distributed rule-based mechanism. The system allows rule propagation (in the ...

Cloud Computing promises a cost-effective and administration-effective solution to the traditional needs of computing resources. While bringing efficiency to the users thanks to the shared hardware and software, the multi-tenency characteristics also ...

The success of cloud computing has radically changed the way in which services are implemented and deployed, and made accessible to external and remote users. The cloud computing paradigm, in fact, supports a vision of distributed IT where software ...

Parallel processing plays an important role for large-scale data analytics. It breaks a job into many small tasks which run parallel on multiple machines such as MapReduce framework. One fundamental challenge faced to such parallel processing is the ...

One of the main contributions of the paper is that we introduce "performance as a service" as a key component for future cloud storage environments. This is achieved through demonstration of the design and implementation of a multi-tier cloud storage ...

Cloud computing is a computational paradigm in which resources such as storage, applications and networking infrastructures can be offered as services over the internet. Due to dynamic and virtualized nature of cloud environments and diversity of client ...

Cloud service providers (CSPs) often overbook their resources with user applications despite having to maintain service-level agreements with their customers. Overbooking is attractive to CSPs because it helps to reduce power consumption in the data ...

The current pay-per-use model adopted by public cloud service providers has influenced the perception on how a cloud should provide its resources to end-users, i.e. on-demand and access to an unlimited amount of resources. However, not all clouds are ...

Virtual Machines (VM) offer data-center and cloud owners the option to lease computational resources such as CPU cycles, Memory, Disk space and Network bandwidth to end-users. Optimal usage of the resources of the Physical Machines (PM) that make up the ...

Along with a large amount of data being outsourced to the cloud, it is imperative to enforce a secure, efficient and privacy-aware access control scheme on the cloud. Decentralized Attribute-based Encryption (ABE) is a variant of multi-authority ABE ...

Dynamic resource scaling is a key property of cloud computing. Users can acquire or release required capacity for their applications on-the-fly. The most widely used and practical approach for dynamic scaling based on predefined policies (rules). For ...

An important feature of cloud computing is its elasticity, that is, the ability to have resource capacity dynamically modified according to the current system load. Auto-scaling is challenging because it must account for two conflicting objectives: ...

With more data generated and collected in a geographically distributed manner, combined by the increased computational requirements for large scale data-intensive analysis, we have witnessed the growing demand for geographically distributed Cloud ...

MapReduce is a software framework for processing data-intensive applications with a parallel manner in cloud computing systems. There are also an increasing number of MapReduce jobs that require deadline guarantees. The existing deadline-concerning ...

Hybrid clouds, geo-distributed cloud and continuous upgrades of computing, storage and networking resources in the cloud have driven datacenters evolving towards heterogeneous clusters. Unfortunately, most of MapReduce implementations are designed for ...

Today, IaaS cloud providers are dynamically minimizing the cost of data centers operations, while maintaining the Service Level Agreement (SLA). Currently, this is achieved by the live migration capability, which is an advanced state-of-the-art ...

The broad diffusion of Cloud Computing has fostered the proliferation of a large number of cloud computing providers. The need of Cloud Brokers arises for helping consumers in discovering, considering and comparing services with different capabilities ...

More and more enterprises have set up their own private clouds by applying virtualization to their data centers, the benefit is flexible resource supply to different internal demands. Aiming to meet the peak demand in their resource provisioning, ...