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Storage demands in the data centers are growing dramatically for most internet and cloud service providers today. More and more service providers are adopting Software-Defined Storage (SDS) instead of traditional fiber channel based storage appliances due to the lead time, expense, and flexibility. However, data centers are held back by storage I/O that cannot keep up with ever-increasing demand,...
We consider the problem of proactive (i.e. predictive) content caching that is aware of the costs of retention of the content in the cache. Prior work on caching (whether proactive or reactive) does not explicitly take into account the storage cost due to the duration of time for which a content is cached. This new problem, which we call retention aware caching, is motivated by two recent technological...
In this paper we present a correctness proof for Infosoft e-Detailing 1.0 presentation software using Isabelle proof assistant. This work illustrates a method of proving correctness of parallel software using proof assistants. Here we concentrate on the state-based approach for proving a safety property. We also give a comparison of this approach with the correctness proof method that was applied...
Due to the expensive hardware and complex management of the traditional middlebox, a concerted effort towards the virtualized middlebox has been launched in both academia and industry. In this paper, we propose a unified middlebox model, MBBrick, which is composed of three operation modules (classifier, rewriter, forwarder) and a control module (the mcontroller). We then design a language, MG, to...
Oracle's Real Application Cluster (RAC) allows multiple database instances to run on different server nodes in a cluster against a shared set of data files. A critical aspect of an Oracle RAC system is that of instance recovery. When a node suffers from a hardware failure, or a database instance suffers from a software failure, instance recovery is performed by a surviving instance to ensure that...
With the rapid development of web, mobile apps and IoT devices, a huge volume of data are created every day. In fact, these data are not only large, but also generated quickly and with a variety of different formats. Many companies are forced to face the problem of processing these large data in near real-time. Within different application domains, some data are required to be processed in real-time,...
It has been observed that there has been a great interest in computing experiments which has been useful on shared nothing computers and commodity machines. We need multiple systems running in parallel working closely together towards the same goal. Frequently it has been experienced and observed that the distributed execution engine named MapReduce handles the primary input-output workload for such...
GTS is a new service in GÉANT that allows users to set up wide-area virtual networks via a web-based automatic provisioning system. The virtual networks are built within minutes over the underlying physical infrastructure and thus allow the researcher to carry out network experiments with great flexibility and enable rapid prototyping and innovation. The individual network environments are isolated...
Batch processing is an essential technique to improve packet rates under high-speed network, which has been widely used in high-performance packet IO frameworks. Conventionally, we need to make a tradeoff between high latency at low input loads and high throughput at high loads. In this work, we intend to leverage the smart batching mechanism to dynamically balance the input traffic rate and the available...
In order to realize the function of accurate measurement, multipoint collection and wireless transmission on various environmental monitoring factors in the workshop, a workshop environment monitoring system is proposed based on the technology of internet of things. A number of wireless monitoring nodes are set up in each workshop to collect a variety of environmental information, then transmit the...
The emerging field of Immersive Analytics investigates how novel display and interaction technologies can enable people to visualise and analyse data and complex information. In this paper, we present ContextuWall, a system for interactive local and remote collaboration using touch and mobile devices as well as displays of various sizes. The system enables groups of users located on different sites...
Virtual Network Functions (VNFs) promise great efficiencies in deploying and operating new services, in terms of performance, resiliency and cost. However, today most operational VNF clouds are still generally static after their initial instantiation, thus not realizing many of the potential benefits of virtualization and enhanced orchestration. In this paper, we explore a large-scale operational...
The energy consumption of cloud servers has dramatically increased. In order to meet the growing demands of users and reduce the skyrocketing cost of electricity, it is critical to have performance guaranteed and cost-effective job schedulers for clouds. In recent years, there has been a growing body of research which focus on improving resource utilization to improve energy efficiency, system throughput...
Network is the direction of development for industrial control, application of PROFIBUS-DP network consisting of S7-300 PLC S7-200 PLC produced by Siemens is becoming more and more widely. WinCC is powerful PC monitoring configuration software, often need to read and write datum of master-slave PLC in the network. This paper discusses the method of direct communication between WinCC and master-slave...
Network functions are widely deployed in modern networks, providing various network services ranging from intrusion detection to HTTP caching, for the purpose of performance, security or policy compliance. According to a recent survey [6], network function deployments are ubiquitous: on par with the number of L3 infrastructures. Application or user requirements may specify policies that require flows...
In this paper it was reviewed several existing investigations about minimization power consumption of data centers. It was suggested several approaches of task distribution in computing networks to minimize power consumption and management system for such networks.
This paper is concerned with the problem of reliability-aware embedding of Virtual Networks (VN), where substrate nodes exhibit heterogeneous and independent failure rates. In this context multiple problems emerge, particularly the concern of estimating the reliability of a VN. Further, a reliable embedding solution may result in a service with over-provisioned reliability (hence waste of network...
Cloud computing has become a cost-effective model for deploying online services in recent years. To improve the Quality-of-Service (QoS) of the provisioned services, recently a number of proposals have advocated to provision both guaranteed server and network resources in the form of Virtual Data Centers (VDCs). However, existing VDC scheduling algorithms have not fully considered the reliability...
Dedicated servers are deployed by companies to meet the ever growing computing demand. More storage and more security are sought after by companies. The inefficient scaling of hardware, higher deployment time, installation of old operating systems on new hardware are just some of the areas where dedicated servers suffer. Cloud severs can be used in lieu of dedicated servers. This will not only decrease...
Many power-aware resource allocation problems in packet networks can be modeled as single-server queueing systems, in which the power consumption depends on the actual service rate. We consider the scenario in which the queue service rate is controlled to minimize server power consumption. We show that power control methods that tune the service rate by using the queue length or the arrival rate exhibit...
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