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Stories about service outages in cloud environments have been making the headlines recently. In many cases, the reliability of cloud infrastructure Application Programming Interfaces (APIs) were at fault. Hence, understanding the factors affecting the reliability of these APIs is important to improve the availability of cloud services. In this study, we mined bugs of 25 modules within the 5 most important...
Recently, with the advent of Internet of things, mobile devices are expected to carry on more and more computation-intensive applications, and mobile cloud computing also comes in to help mitigate the burden of mobile devices. However, due to the rapidly growing density of mobile devices, the current single cloud environment will still encounter resource depletion, which will lead to application offloading...
In this paper we propose a task based load distribution framework for Massively Multiplayer Online Games running in hybrid cloud environments. Our solution breaks down high level tasks into subtasks in such a way that i) core subtasks (those with strong timing constraints) are executed at private resources owned by game operators; while ii) background subtasks (those with looser timing/reliability...
With increasing critical business organizations focusing on the quality of service in cloud applications, high availability (HA) has become critical for the product level cluster of cloud applications. Existing availability evaluation methods or testing projects for cloud platforms, however, cannot sufficiently verify cluster tolerance to various reasonable environmental faults. This paper proposes...
Cloud computing has been evolved from server based context to service-oriented context. This transformation poses lots of challenges to a cloud environment in terms of cloud service reliability and information security. In most of the aspects of current cloud service environment, lot of information exchange taking place without much security. In this context cloud computing, with reliability and security...
The phenomenon of high availability (HA) is of vital importance in cloud architecture. This paper proposes an HA verification framework, called HAVerifier, for OpenStack, a popular open source cloud platform. Fault injection technology has been adopted to verify the system's reliability by determining its health status after injecting faults. The framework proposed in this paper verifies the availability...
Data-driven research is increasingly ubiquitous and data itself is a defining asset for researchers, particularly in the computational social sciences and humanities. Entire careers and research communities are built around valuable, proprietary or sensitive datasets. However, many existing computation resources fail to support secure and cost-effective storage of data while also enabling secure and...
Nowadays, Universities have become more reliant on Information and Communication Technology (ICT) to provide educational services for their stakeholders. While most of the Universities in Europe and North America has harnessed the capabilities of cloud services to provide large scale flexibly electronic educational services. In Saudi Arabia, most of the Universities are start-ups with limited IT Staff...
Cloud computing brings new technologies and concepts that favor communication services and data storage. Services like OneDrive, Google Drive and DropBox increase data availability and provide new features as synchronization and collaboration. This article aims to assess the availability and performance of private cloud storage service. A set of models that use a hierarchical strategy is proposed...
A private machine-cloud architecture and the associated Self-reliant Control System (SCS) for industrial applications are presented in this paper. The machine-to-machine (M2M) IP-based local area network creates a backbone for the proposed architecture, in which the traditional analogue input and output (I/O) or field-bus subsystems of a traditional process control system are not required. The proposed...
In recent years, cloud service is developing rapidly with its advantages of on-demand service, elastic extension and low-cost. Although the development of the cloud service is rapidly, more and more accidents also occur. So reliability of cloud services becomes the important factor that hinders its development, and in recent years the reliability of cloud services is becoming a research hotspot. In...
Cloud computing software systems are customizable using various configurations based on users needs. Performance of such software systems vary depending on selected configurations and interaction among these configurations. Most of the users of a software system, that consists of several hundreds of configurations, use only very few configurations that are common. Failure of such important or common...
The widespread utilization of cloud computing services has brought in the emergence of cloud service reliability as an important issue for both cloud providers and users. To enhance cloud service reliability and reduce the subsequent losses, the future status of virtual machines should be monitored in real time and predicted before they crash. However, most existing methods ignore the following two...
Online graph analytics and large-scale interactive applications such as social media networks require low-latency data access to billions of small data objects. As a consequence, more and more distributed in-memory systems are proposed allowing to keep all data always in memory. However, these systems also need fault-tolerance mechanisms to mask node failures and power outages. We propose a novel...
In nowadays cloud computing systems, leveraging the virtualization technology, the customer's requested data computing or storing service is accommodated by a set of mutual-communicated Virtual Machines (VM) in a scalable and elastic manner. These VMs are placed in one or more datacenter nodes according to nodes' capacities, failure probabilities, etc. The VM placement availability refers to the probability...
Atomic multicast is a group communication primitive that allows disseminating messages to multiple distributed processes with strong ordering properties. As such, atomic multicast is a widely-employed tool to build large-scale systems, in particular when data is geo-distributed and/or replicated across multiple locations. However, all the most efficient atomic multicast algorithms suffer from a convoy...
Smart grid is an enhancement of traditional electric grid which provides two way communication and information technologies and computational facilities for data storage across all sectors of electricity to achieve efficient, secure and reliable electric system. Reliability of nation's bulk power system can be improved by incorporating an interconnection wide real time monitoring system to provide...
Cloud federation is a group of aggregated providers, who are mutually cooperating and collaborating to share their resources in order to improve each other services. It has lured the attention of commercial industries towards itself for its effective utilization of cloud resources. Effective management of the resource is very much required in order to increase the profits of an individual service...
At present, cloud computing is used widely. Cloud services through the cloud platform provide various services to users. And cloud services will play an increasingly important role in the economy and society. Service level agreement (SLA) is an indispensable part of information service in the cloud environment. It is not only the legal protection of the quality of the cloud services, but also provides...
Recent years have witnessed the explosion of the data universe. Facing the rapid growth of the data size, cloud storage is proposed as an approach to provide cost-efficient and reliable data storage service. As data size grows, data centers providing cloud storage service need more storage resources to meet the ever-increasing requirements. Data deduplication is a technology aiming to remove redundant...
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