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Enabling Enterprise Blockchain AppDev Teams

Enabling Enterprise Blockchain AppDev Teams

引用

international conference on Advanced computing and Communications (ADCOM)

作者： Prateek Reddy Yammanuru Ayush Jain Harihara Vinayakaram Wipro Technologies

ISBN: (纸本)9781538669129;9781538669112

Blockchain is the latest buzzword in the FinTech scene and all companies big and small are vying to launch blockchain enabled products. At the basic technology level Blockchain is a distributed technology application. The challenges of operating such an application are known [1]. But the techniques of developing distributed applications by large enterprise teams, in a typical SDLC lifecycle (Develop, Test, Deploy and Upgrade) is not well known. Without proper methodologies / Formal Tools as is the case with most blockchain systems, bugs slip in easily. Studies on failures point to developers missing low handing bugs as most of the errors are simulated with 3 nodes or less [2]. The developer ecosystem is fast changing with technologies like containers and the emerging Micro Services architectures and Cloud Native computing. The decisions on setup, build, CI/CD, Automated Testing are not taken at the beginning and as pointed out by [3] affect the entire project. The good news is that there are lot of tools available in the Open source domain that addresses the needs. The bad news is that picking the right combination to work in team sizes of 5 or more is not straight forward. This paper details our journey and lessons learnt on setting up Application Development Teams for Rapid Development in Blockchain using multiple blockchain tools like Ethereum and the HyperLedger Fabric. It details both our application architecture and the modifications needed to enable a Cloud Native architecture and the build/ deploy/ testing frameworks that we used.

关键词： Blockchain Tools Testing Computer architecture distributed ledger Fabrics Chaos

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CPU Load Prediction Using Support Vector Regression and Kalman Smoother for Cloud

CPU Load Prediction Using Support Vector Regression and Kalm...

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international conference on distributed computing systems Workshop

作者： Rongdong Hu Jingfei Jiang Guangming Liu Lixin Wang School of Computer National University of Defense Technology Changsha China National Supercomputer Center Tianjin China

Cloud service provider's revenue is tightly related with the QoS and resources utilization. One optimal strategy is to timely allocate resources in a fine-grained mode according to the actual resources demand of applications. The necessary precondition of this approach is obtaining future load information in advance. CPU has a significant effect on the performance of applications. So CPU load prediction is one of the most important requirements in the Cloud resources provisioning. We propose a multi-step-ahead CPU load prediction method based on Support Vector Regression which is suitable for the dynamic characteristics of applications and the complex Cloud computing environment. Kalman smoothing technology is integrated to further reduce the prediction error. Real trace data were used to verify the prediction accuracy and stability of our method, comparing with AR, BPNN and standard SVR.

关键词： Kalman filters Support vector machines Predictive models Cloud computing Autoregressive processes Accuracy Load modeling

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Online Auctions with Dynamic Costs for Ridesharing

Online Auctions with Dynamic Costs for Ridesharing

引用

international conference on Parallel and distributed systems (ICPADS)

作者： Chaoli Zhang Fan Wu Xiaofeng Gao Guihai Chen Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiao Tong University China

ISBN: (纸本)9781538632086

Uber, Lyft and some other companies achieve great business success in the area of ridesharing. However, there are still many issues to be addressed, for instance, the lack of a well-designed rush hour (i.e., when supply is much less than demand) pricing strategy, the seat resources waste and so on. The online ridesharing model fits better to reality but brings significant design challenges. In this paper, we propose a complementary online auction design: No Preemption auction. The auction in ridesharing needs to deal with dynamic costs, which is different from most of the existing auctions and brings significant challenges. We design corresponding online auction mechanism for this model. Our mechanism is truthful with Risk Aversion Hypothesis, budget balanced (i.e., the payment is not less than the cost), computational efficient, individually rational, and make the best use of the seat resources. We give theoretical proof of the truthfulness, budget balance, computational efficiency and individual rationality. We also give a discussion about the general online ridesharing mechanism performance. Finally, we evaluate the performance of our mechanism based on real taxi-trace data in Shanghai. The results show that our mechanism can achieve rather good revenue and social welfare.

关键词： Automobiles Resource management Pricing Surges Companies Public transportation

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Revealing Potential Performance Improvements by Utilizing Hybrid Work-Sharing for Resource-Intensive Seismic Applications

Revealing Potential Performance Improvements by Utilizing Hy...

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Euromicro conference on Parallel, distributed and Network-Based Processing

作者： Patrick Siegl Rainer Buchty Mladen Berekovic Chair for Chip Design for Embedded Computing (C3E) Technische Universität Carolo-Wilhelminazu Braunschweig

Heterogeneous system architectures are becoming more and more of a commodity in the scientific community. While it remains challenging to fully exploit such architectures, the benefits in performance and hybrid speed-up, by using a host processor and accelerators in parallel in a non-monolithic matter, are significant. Hereby, the energy efficiency is becoming an increasingly critical challenge for future high-performance computing (HPC) systems, which do want to exceed the Exascale barrier with several competing architecture concepts ranging from high-performance CPUs, combined with GPUs acting as floating-point accelerators, to computationally weak CPUs, paired with dedicated and highly-perform ant FPGA-based accelerators. In this paper, we realize and evaluate a hybrid computing approach based on a two-dimensional seismic streaming algorithm with several heterogeneous system architectures, including conventional HPC approaches based on powerful CPUs and GPUs. Furthermore, we elaborate the effort on an embedded system platform claiming to be a "mini supercomputer" [1]. Several CPU and accelerator combinations are utilized in a manual work-sharing manner with the aim of achieving significant performance speed-ups and a detailed energy-efficiency study. Based on roofline models and experimental evaluations, the paper provides an insight into the fact that hybrid computing is mostly unconditionally beneficial for balanced systems regarding the performance as well as the energy efficiency, aiding the programmer in the decision whether or not costly, manually tuned, homogeneous implementations are worthwhile.

关键词： Graphics processing units Computer architecture Partitioning algorithms Benchmark testing Instruction sets Computational modeling Performance evaluation

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Container Live Migration for Latency Critical Industrial Applications on Edge computing

Container Live Migration for Latency Critical Industrial App...

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IEEE international conference on Emerging Technologies and Factory Automation

作者： Keerthana Govindaraj Alexander Artemenko Robert Bosch GmbH Renningen Corporate Sector Research and Advance Engineering Germany

A new level of factory automation demands processing vast amounts of data, complex orchestration of cyberphysical systems, and coordination of computation as well as communication resources in real-time. Virtualization and decentralized computation is becoming a de-facto solution for factory automation. Edge computing (EC) is a promising approach to achieve the low latencies required by many industrial systems. It employs resource rich edge servers distributed within a factory that are placed close to end devices and assist them in executing computation intensive tasks and also in coordinating with each other. This paper discusses the requirements and challenges of EC for factory automation applications. In a distributed EC infrastructure, safe and timely operation of industrial applications require load balancing and mobility support and thus a seamless service migration between the edge servers. With the recent advances in virtualization and due to its advantages, virtual machine (VM) and container technologies are pavings its way into factory. Though containers have some distinctive advantages over VMs in EC, the service live migration has comparatively high downtime. This paper proposes a novel live migration scheme called redundancy migration that reduces the downtime by a factor of 1.8 compared to the stock migration in linux containers.

关键词： Containers Factory automation Downtime Latency Stateful Migration

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Ambient telephony: Designing a communication system for enhancing social presence in home mediated communication

Ambient telephony: Designing a communication system for enha...

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international conference on Affective computing and Intelligent Interaction and workshops, ACII

作者： Jorge Peregrín Emparanza Pavan Dadlani Boris de Ruyter Aki Härmä Industrial Design Faculty Delft University of Technnology Netherlands Philips Research Eindhoven Netherlands

The experience of telephonic communication in the home environment has remained very similar for decades: practical, but intrusive, and providing little experience of social presence. This paper presents the work aiming at improving the experience of social presence experience in telephony. We present the results of several user studies on telephone usage and based on these, propose the use of distributed speakerphone systems (or ambient telephones). We report empirical research comparing two different ambient telephone systems. The first system is an ambient system where the arrays of loudspeakers and microphones are embedded in the ceiling and the home audio system around the home. In the second experiment, we replaced the embedded system by a distributed set of clearly visible and tangible speakerphone units. We report lessons learned and implications for the design of ambient telephone systems.

关键词： Telephony Loudspeakers Microphone arrays Context Communication industry Audio systems Embedded system Auditory displays Prototypes Testing

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A Proximity-Aware Load Balancing Algorithm in P2P systems

A Proximity-Aware Load Balancing Algorithm in P2P Systems

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international conference on Grid and Pervasive computing workshops, GPC

作者： Jianhua Sun Lijuan Li Hao Chen Huailiang Tan Advanced Internet and Media Laboratory School of Comp. and Comm. Hunan University Changsha China

In structured P2P systems, the heterogeneity of node capacity and semantic relativity of keys can cause load imbalance among nodes. Aiming at the problem of tasks distributed unbalancedly among nodes in large-scale DHT networks, an efficient proximity - aware algorithm is presented in this paper. The node with light load constructs a star-like structure with other nodes physically close to it. The physical location information is generated by network positioning algorithm. And then, load can be transferred within the star-like structure. Simulation experiments show that the algorithm can achieve good load balance and the load movement cost reduction rate is above 40%.

关键词： Load management Peer to peer computing Bandwidth Fault tolerant systems Internet Costs Pervasive computing Sun Large-scale systems Computer networks

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Modeling and Prediction of Performability of Safety Critical Computer Based systems Using Petri Nets

Modeling and Prediction of Performability of Safety Critical...

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IEEE international conference on Software Reliability Engineering workshops (ISSRE Wksp)

作者： Lalit Kumar Singh Gopika Vinod A.K. Tripathi Department of Atomic Energy NPCIL R&D-Electronics Systems Mumbai Govt. of India Department of Atomic Energy Reactor Safety Mumbai Govt. of India Department of Computer Engineering Indian Institute of Technology (BHU) Varanasi India

ISBN: (纸本)9781467350488

Computer based safety critical systems are progressively replacing analog systems in safety-critical applications like nuclear power plants. Hence these systems require modeling techniques to estimate performability in the early stages of the system development life cycle. This paper addresses the dynamic modeling of Test Facility of a safety critical system used in Nuclear Power plant. System function and its architecture have been explained. No details of the system have been shown that can jeopardize the confidentiality & hence exact details have been concealed. Special attention has been paid to the modeling part of a communication module of this system in between the two computer based subsystems that are running on different platform, VxWorks and Linux, using a mathematical formalism, Petri Net. Also, formalism of Petri nets with particular emphasis on the application of the methodology in the area of the performance and reliability modeling and analysis of the computer based systems, taking Test Facility system as a case study, is illustrated in this paper. This paper also describes the use of TimeNET (Timed Net Evaluation Tool), a software package for the modeling and evaluation of stochastic Petri nets with non-exponentially distributed firing times to evaluate performability.

关键词： Firing Markov processes Computers Petri nets Test facilities Computational modeling Safety

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A reference model for IT management responsibilities

A reference model for IT management responsibilities

引用

international Workshop on Enterprise distributed Object computing, EDOCW

作者： Magnus Gamemlgård Åsa Lindström Mårten Simonsson Royal Institute of Technology Stockholm Sweden

This reference model for IT management responsibilities covers the most important aspects when modeling, analyzing and evaluating enterprise architecture, EA. The reference model can be employed to support IT management in their quest to make well-informed decisions, e.g. to derive architectural principles in order to obtain a proper scope for EA activities, measure the status of the current EA, follow up changes committed, and evaluate alternative EA scenarios. The model is based on extensive literature studies and has been tested in a series of empirical studies.

关键词： Organizational aspects Technology management Testing Management information systems Current measurement Decision making Business communication Context modeling Hardware conference management

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Query Performance Comparison of PostgreSQL vs. Neo4j. A Basic distributed Setup on OpenStack 23

Query Performance Comparison of PostgreSQL vs. Neo4j. A Basi...

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23rd RoEduNet conference: Networking in Education and Research, RoEduNet 2024

作者： Fotache, Marin Teaca, Nicoleta Esanu, Codrin-Stefan Cluci, Marius-Iulian Pinzaru, Ciprian Gasner, Paul Cuza University of Iasi Alexandru Ioan Dept. of Accounting Information Systems and Statistics Iasi Romania Cuza University of Iasi Alexandru Ioan Iasi Romania Cuza University of Iasi Cegeka Romania Iasi Alexandru Ioan Romania Cuza University of Iasi S.C. HVM SRL IaşIasi Alexandru Ioan Romania Cuza University of Iasi Faculty of Physics Alexandru Ioan Iasi Romania

ISBN: (纸本)9798331540388

Among the NoSQL technologies, Neo4j is one of the most popular solutions for managing graph databases and an early adopter of transactions (contrary to other NoSQL systems). Neo4j also provides a powerful high-level data processing language-Cypher. Despite its popularity, there are few comprehensive studies about benchmarking the query performance of Neo4j relative to SQL or other NoSQL counterparts. In this paper, we present a module for converting the TPC-H benchmark database from PostgreSQL to Neo4j, and we built a set of 110 SQL queries that were translated into Cypher. For both database servers, the queries were executed with a 10-minute timeout on OpenStack setups following nine scenarios by combining three database scale factors (1 GB, 5 mGB, and 10 GB) with three data distribution variants (with 1,5, and 10 nodes). Results provide support for query performance assessment of these two big data products. © 2024 IEEE.

关键词： Structured Query Language

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