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Wearable devices such as smart watches become popular, especially thanks to connectivity with smartphones. They are, however, sensitive to energy consumption that is caused by computation and networking capabilities. This motivates to develop task offloading techniques that enable to perform task computation on smartphones rather than on wearable devices. In this paper, we propose a new offloading...
The number of small-and mid-cap companies increases in recent decades due to the change on technologies. A considerable number of information systems are thus built for efficient production and management. As a result, a large number of operations and data are generated. The internal IT unit must have the ability to process the large amount of data, provide different services for each kinds of users,...
HDFS has been widely used for storing massive scale data which is vulnerable to site disaster. The file system backup is an important strategy for data retention. In this paper, we present an efficient, easy- to-use Backup and Disaster Recovery System for HDFS. The system includes a client based on HDFS with additional feature of remote backup, and a remote server with a HDFS cluster to keep the backup...
Nowadays, with the fast advancement of mobile technology, mobile devices are more energy hungry. Battery life has become the performance bottleneck of mobile devices. Short battery life greatly reduces user satisfaction. This paper proposes GScheduler – a dynamic energy-aware task scheduler for mobile devices. The goal of GScheduler is to turn mobile devices and computers at home/office into an energy-aware...
The convergence of high-performance computing and big data, which has become known as the field of extreme big data, is problematic in that file creation in storage systems such as distributed file systems is not optimized. That is, the large workload leads to the simultaneous creation of many files by many processes when creating checkpoints. The need to improve the file creation processes prompted...
With the introduction of the new NVIDIA Pascal GPU architecture, the need to evaluate its real performance in HPC environments arises. In this paper we briefly present some preliminary results. Compared to its predecessors, the new architecture clearly shows a great improvement.
NVMe is emerging as the standard protocol for communicating with high performance storage devices over the PCIe interface, independent of the underlying storage technology. Being a relatively new standard, there is a distinct lack of tools that can help in evaluating contemporary and future storage solutions built on NVMe. In this paper, we provide the design and analysis of FlexDrive, a software...
The wide spread of smart mobile devices such as tablets and phones makes mobile crowdsensing a viable approach for collecting data and monitoring phenomena of common interest. Smart devices can sense and compute their surroundings and contribute to mechanisms that examine social and collective behaviours. Crowdsensing offers a feasible alternative to exchange and compute sensing tasks and data between...
As more and more consumers access streaming video content over the internet, enterprises across the entire video distribution value chain experience tremendous pressure to deliver better performance and high quality of experience (QoE) to the end users. Enhanced video performance is highly desirable, starting from the Video Origin Servers through the core network and Content Delivery Networks (CDN)...
We consider a device-to-device coded caching system, where each user is guaranteed recover its requested file and is simultaneously prevented from recovering any file it did not request. We jointly optimize the cache placement and delivery policies such that a set of end users are able to satisfy their requests while preserving the confidentiality constraints. We develop an upper bound utilizing secret...
Pakistan is a rapidly growing cellular market with a growth rate of 185 % in number of mobile broadband users during 2014-16 and over 15.75 million mobile broadband users [4]. The exponential increase in broadband penetration demands investigation of mobile broadband performance from an end user perspective. To the best of our knowledge, no extensive study exists to document mobile broadband services...
An Open Ethernet Drive (OED) is a new technology that encloses into a hard drive (HDD or SSD) a low-power processor, a fixed-size memory and an Ethernet card. In this study, we thoroughly evaluate the performance of such device and the energy requirements to operate it. The results show that first it is a viable solution to offload data-intensive computations on the OED while maintaining a reasonable...
The overlay network has been widely developed in recent years. There may be various overlays that co-exist with each other upon the same underlying network. These overlays have heterogeneous performance goals, and they will compete for the physical resources, so that a sub-optimal performance of the overlays may be achieved. Moreover, the heterogeneity of the overlays makes them difficult to coordinate...
Many cloud-based applications employ a data centers as a central server to process data that is generated by edge devices, such as smartphones, tablets and wearables. This model places ever increasing demands on communication and computational infrastructure with inevitable adverse effect on Quality-of-Service and Experience. The concept of Edge Computing is predicated on moving some of this computational...
SPECjbb2015 is the latest benchmark suite from SPEC that evaluates Java application servers. In this paper, we present a preliminary study of power and performance analysis on SPECjbb2015, in particular, the power reduction by means of DFS parameter tuning and its trade-off against the service level agreement (SLA) based performance metrics. We run SPECjbb2015 on the Composite (standalone) and Distributed...
In recent times, the number of mobile Android devices has been growing exponentially not only in the expanding popularity of low-cost mobile devices but also for the great number of functionalities and applications. This new range of features has highlighted the need for greater capacity in mobile batteries to provide an extended time of use. Several studies have been done to minimize the impact on...
With the advent of network "softwarization", Network Functions Virtualization (NFV) is foreseen to provide flexibility and programmability levels that would essentially help in coping with tomorrow's demands. However, energy efficiency and the resulting complexity of network/service management pose serious sustainability and scalability issues that may hinder NFV's advantages. This paper...
Despite the vision-based traffic condition analysis system provides better data quality than those of traditional UTS-based applications, it still have a problem of inefficiency because it handles commonly large size of video data. In this paper, we designed a feature-based image examining method to reduce the load of the vision-based application by measuring similarity of feature data before handling...
Network Functions Virtualization (NFV) aims at replacing proprietary hardware appliances with software running on a standardized, general purpose computing platforms. Recently, the concept has gained traction in the industry and major deployments have been announced. However, benchmarking the performance characteristics of virtualized network functions (VNFs) is still an active research topic. VNFs...
This paper compares the I/O performance, flexibility and ease of use features of Linux file systems; Ext4, XFS, BtrFS running on storage stack systems namely LVM and ZFS with RADOS Block Devices (RBD) as the underlying block devices as replacement to physical disks. Experiment sets that have been conducted to evaluate performance of selected file systems; Ext4, XFS, BtrFS and ZFS are presented and...
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