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Cloud computing is an emerging trend for online computing and resource management. OpenStack is one of the most widely used open source platform for establishing public and private clouds. Besides its implementation issues much of the importance is being given on its performance optimization. This paper focuses on such a study to improve performance of an OpenStack Cloud and its further optimization...
Test beds are essential in teaching and research on computer networks and security. However, designing and deploying a test bed is an expensive task. Various virtualization technologies make this task easier by enabling the creation and deletion of virtual machines (VMs) and their networks in less time on a single physical infrastructure. However, these VM based test beds are heavy-weight. In this...
Big Data technologies like hadoop are transforming analytics and processing, but is there a role mainframe can play in improving big data analytics deployed in organizations' private clouds? Over the period of 60 years, mainframe has contributed extensively to the IT industry but has been replaced by newer machines and methods these days. In this paper we will examine some potential advantages mainframe...
Recent years have seen a significant number of low-cost (sub-$100) Linux-based microcontroller systems introduced to the market. Initially targeted to the educational and hobbyist markets, the low cost, small physical package, low power consumption and high compute capability of these microcontrollers has made them interesting to research and technical communities. Many of the applications these platforms...
Insider threats are evolving constantly and misuse the granted resource access for various malicious activities. These insider threats make use of internal network flaws as the loop holes and are the root cause for data exfiltration and infiltration (Data leakage). Organizations are devising and deploying new solutions for analyzing, monitoring and predicting these insider threats. However data leakage...
The proliferation of (mobile/portable) devices with the ability to connect to multiple interfaces in parallel (e.g., LTE, Wi Fi, small cells, and even wired LAN in case of a laptop) has led to the emergence of a number of usecases involving bandwidth aggregation - i.e., scenarios where more than one available interface is used to support one application requiring higher bandwidth than each of those...
To function correctly Online, Data-Intensive (OLDI) services require low and consistent service times. Maintaining predictable service times entails requiring 99th or higher percentile latency targets across hundreds to thousands of servers in the data-center. However, to maintain the 99th percentile targets servers are routinely run well below full utilization. The main difficulty in optimizing a...
Cloud computing makes extensive use of virtual machines because they permit workloads to be isolated from one another and for the resource usage to be somewhat controlled. In this paper, we explore the performance of traditional virtual machine (VM) deployments, and contrast them with the use of Linux containers. We use KVM as a representative hypervisor and Docker as a container manager. Our results...
Most of the organizations not only compete in their field of expertise, but they also compete to be the leaders and the initiators of using modern applications and advanced technologies. Therefore, as the amount of data to be stored is inevitably increasing, the demand for faster data retrieval and sharing is getting higher and the level of security is becoming more critical. Most organizations enter...
This paper tries to establish relation between the power usage and software aging. Software aging is the performance degradation of long running software due to shrinking in physical memory, increase in swap read and write rate and increase in CPU utilization. This paper tries to establish the relation between the Software aging and the power usage. Experimental results demonstrate that CPU utilization...
Cloud computing is now leading-edge Internet technology and virtualization technology is one of the important part of cloud computing system. Virtualization, in computing, refers to the act of creating a virtual (rather than actual) version of something, including but not limited to a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Docker is...
Hadoop is an open source tool. It enables the processing and distributed storage of big data sets using commodity cluster computing. With Hadoop occupying a core status in the current processing era, its performance optimization is also being heavily studied. This paper introduces one such method to improve Hadoop cluster performance by using a Remote Procedure Call (RPC), rpcbind service of the Linux...
Virtualization provides the function of saving the whole execution environment status of the running virtual machine (VM), which makes check pointing flexible and practical for HPC servers or data center servers. However, the system-level check pointing needs to save a large number of data to the disk. Moreover, the overhead grows linearly with the increasing size of virtual machine memory, which...
In Infrastructure-as-a-Service (IaaS) clouds, users remotely manage the systems in virtual machines (VMs) called user VMs, e.g., Through VNC. To allow users to manage their VMs even on failures inside the VMs, IaaS usually provides out-of-band remote management. This VM management is performed indirectly via a VNC server in a privileged VM called the management VM. However, it is discontinued when...
The amount of data located in storage servers increases continually with the growth of cloud and social networking services. Storage systems with very large capacities are prone to poor reliability and long latency, which can be addressed by using hybrid disks that contain both mechanical and flash memory storage. In Linux, these two types of device can be combined using a caching technique provided...
While many cloud providers today offer powerful computing infrastructure as a service, and enterprises are already making routine use of it, the adoption of cloud computing for engineering and scientific applications is lagging behind. Despite the many benefits cloud resources provide, reasons for this slow adoption are many: complex access to clouds, inflexible software licensing, time-consuming...
Hypervisors are becoming increasingly ubiquitous with the growing proliferation of virtualized data centers. As a result, attackers are exploring vectors to attack hypervisors, against which an attack may be executed via several attack vectors such as device drivers, virtual machine exit events, or hyper calls. Hyper calls enable intrusions in hypervisors through their hyper call interfaces. Despite...
With the emergence of multi-core and multi-socket non-uniform memory access (NUMA) platforms in recent years, new software challenges have arisen to use them efficiently. In the field of high performance computing (HPC), parallel programming has always been the key factor to improve applications performance. However, the implications of parallel architectures in the system software has been overlooked...
This paper addresses the performance and service comparison of two different Cloud Computing platforms: Amazon AWS and Microsoft Azure. Platforms are tested in similar virtual environments, namely for micro instances. Performance is measured by the collection benchmark program called Phoronix Test Suite 3, and the results are presented for Apache and Dbench benchmarks.
The paper presents an implementation of client software for reception of television program from a SAT2IP server. The client software is written in C programming language, for Linux operatnig system. RTSP protocol is used for command connection, and RTP-RTCP for transmission of media stream. Both unicast and multicast operation are supported. The client can be integrated in Set Top Box software stack,...
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