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international conference on distributed computing systems Workshop

作者： G. Kastidou E. Pitoura G. Samaras Department of Computer Science University of Ioannina (UoI) Greece Department of Computer Science University of Cyprus Cyprus

In this paper, we propose a novel mobile agent tracking mechanism based on hashing. To allow our system to adapt to variable workloads, dynamic rehashing is supported The proposed mechanism scales well with both the number of agents and the number of moving and querying operations. We also report on its implementation in the Aglets platform and present performance results.

关键词： Mobile agents Computer science Mobile communication Network servers Mobile computing Real time systems Information retrieval Open systems Merging Load management

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Migrating Deep Learning Data and Applications among Kubernetes Edge Nodes 23

Migrating Deep Learning Data and Applications among Kubernet...

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23rd IEEE international conference on High Performance computing and Communications, 7th IEEE international conference on Data Science and systems, 19th IEEE international conference on Smart City and 7th IEEE international conference on Dependability in Sensor, Cloud and Big Data systems and Applications, HPCC-DSS-SmartCity-DependSys 2021

作者： Mangkhangcharoen, Suchanat Haga, Jason Rattanatamrong, Prapaporn Thammasat University Department of Computer Science Pathum Thani Thailand National Institute of Advanced Industrial Science and Technology Tsukuba Japan

ISBN: (纸本)9781665494571

Many current IoT applications deployed at the edge use deep learning (DL) in their real-time processing and analytics. Not only inference but also training is moving to edge devices. DL application and dataset migration among these devices are mandatory for scenarios like node failure, user mobility or when nodes need to collaborate (e.g., distributed training). Container technologies and Kubernetes (K8s) are being increasingly adopted to manage infrastructure at the edge. Unfortunately, there is no built-in mechanism in K8s to support migration of stateful containers between its cluster nodes. The K8s cluster's master node generally launches a new fresh container in another node to replace the failed one. While there is an existing mechanism for migrating a Pod between K8s nodes, there is no past work investigating the migration of DL datasets and containerized DL applications among K8s cluster nodes. In this paper, we present our 1) comprehensive study on the effectiveness and limitations of existing checkpointing mechanisms for containerized DL applications and 2) our comparative performance study of several approaches in migrating DL datasets and applications in a K8s cluster. Our results show that migrating states of DL applications and restoring them from their previous states enables faster recovery (reducing training time by 10 to 73 percent) than re-running these models from the beginning regardless of the percentage of epochs that have completed. Additionally, our experimental results show that transferring a dataset between K8s workers using the K8s persistent volume with kubectl cp is generally suitable and efficient. However, when network latency is high, using our customized middleware with a feedback controller to migrate data in parallel can speed up total migration time compared to the K8s's persistent volume approach alone. © 2021 IEEE.

关键词： Training Deep learning Checkpointing Computers Containers Real-time systems Internet of Things

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The tangible file system

The tangible file system

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international conference on distributed computing systems Workshop

作者： A. Karypidis S. Lalis Distributed Systems Laboratory Foundation for Research & Technology Hellas Institute for Computer Science Greece Department of Computer and Communication Engineering University of Thessally Greece

The "tangible file system"/sup 1/ is a document management and access infrastructure for the ubiquitous computing era. It provides a transparent user interface which takes advantage of physical user actions for the purpose of directory management, data sharing and document location tracking. This is achieved by digitally augmenting both documents and document containers to detect the location of physical information and to trigger corresponding update actions in the electronic world. The system is built using the Datlet [9] architecture to allow any 'tool-objects' to be applied to 'data-objects', thereby enabling an even more natural user interaction based on affordances.

关键词： File systems Pervasive computing Ubiquitous computing User interfaces distributed computing Physics computing Laboratories Computer science Technology management Engineering management

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CKDS: An efficient combinatorial key distribution scheme for wireless ad-hoc networks

CKDS: An efficient combinatorial key distribution scheme for...

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23rd IEEE international Performance, computing, and Communications conference (IPCCC 2004)

作者： Moharrum, M Mukkamala, R Eltoweissy, M Old Dominion Univ Dept Comp Sci Norfolk VA 23529 USA

ISBN: (纸本)0780383966

computing and communications in wireless ad hoc networks (WAHNs) generally require collaboration among groups of peers. this, in addition to a growing number of group applications over WAHNs, have motivated research in secure group communication services as a means for efficient and secure communications in WAHNs. Key distribution is at the heart of secure group communications. Existing key distribution schemes, designed for infrastructure networks, tend to be inappropriate for the infrastructure-less WAHNs. Also, most of these schemes assume network-level multicast which is difficult to implement in WAHNs. We propose a new efficient and scalable Combinatorial Key Distribution Scheme (CKDS) to support secure group communications in WAHNs. CKDS partitions nodes over a virtual Cartesian key space and uses combinatorial exclusion basis systems for key distribution over application-level multicast. We employ a fully distributed unicast key distribution underlying a virtual application-level multicast infrastructure. Two variants of CKDS are proposed, namely, m-dimensional multicast and 2D multicast. Performance analysis shows that these schemes achieve lower network traffic overhead as well as lower computational overhead per node compared to other unicast key distribution schemes in WAHNs. We also show our scheme to be scalable with respect to both computational and storage needs.

关键词： Wireless telecommunication systems

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Interacting agents in networks: E-auction and emergence in E-marketing

Interacting agents in networks: E-auction and emergence in E...

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international conference on distributed computing systems Workshop

作者： V.K. Murthy E.V. Krishnamurthy School of Computer Science UNSW@ADFA University of New South Wales Canberra ACT Australia Computer Sciences Laboratory Australian National University Canberra ACT Australia

This paper describes how a set of agents can be used for collaboration in E-marketing and-E-Auction. We have formalized an integrated model consisting of the salient features of several agent paradigms, and link it with the distributed software engineering methodology. The integrated model proposed here has the simplicity and adaptability for realisation as a distributed transaction based paradigm for negotiation and other E-marketing problems. Also it can provide an insight into the self-organized criticality in a network of agents.

关键词： Intelligent networks Collaboration Australia Software engineering distributed computing Multiagent systems Computer science Laboratories Information systems Mobile agents

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Agent patterns for ambient intelligence

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ER 2004 workshops held in Conjunction with the 23rd international conference on Conceptual Modeling

作者： Bresciani, P Penserini, L Busetta, P Kuflik, T IRST ITC I-38050 Trento Italy

ISBN: (纸本)3540237232

The realization of complex distributed applications, required in areas such as e-Business, e-Government, and ambient intelligence, calls for new development paradigms, such as the Service Oriented computing approach which accommodates for dynamic and adaptive interaction schemata, carried on on a per-to-peer level. Multi Agent systems offer the natural architectural solutions to several requirements imposed by such an adaptive approach. This work discusses the limitation of common agent patterns, typically adopted in distributed information systems design, when applied to service oriented computing, and introduces two novel agent patterns, that we call Service Oriented Organization and Implicit Organization Broker agent pattern, respectivelly. Some design aspects of the Implicit Organization Broker agent pattern are also presented. The limitations and the proposed solutions are demonstrated in the development of a multi agent system which implements a pervasive museum visitors guide. Some of the architecture and design features serve as a reference scenario for the demonstration of both the current methods limitations and the contribution of the newly proposed agent patterns and associated communication framework.

关键词： Multi agent systems

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DESIGN PROBLEMS OF CONTROL systems FOR MANUFACTURING AND INSTRUMENTATION EQUIPMENT 21

DESIGN PROBLEMS OF CONTROL SYSTEMS FOR MANUFACTURING AND INS...

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21st international conference on Applied computing 2024, AC 2024 and 23rd international conference on WWW/Internet 2024, ICWI 2024

作者： Platunov, Alexey Kluchev, Arkady Pinkevich, Vasiliy Kolchurin, Maxim Kluchev, Vladislav Asminkin, Fedor ITMO University Saint Petersburg Russia

ISBN: (纸本)9789898704627

Modern automation systems are extremely diverse. Traditional multilevel distributed systems of industrial and infrastructural automation, multi-operational manufacturing equipment, instrument automation and other segments can be highlighted. computing components of automation systems are now considered as parts of cyber-physical systems (CPS), which allowed the engineering community to make a few significant advances in design technologies, while introducing a new level of problems. To reduce design deadlines and improve the quality of increasingly complex automation systems, we consider the further development of high-level design stages of control systems as a promising trend. The paper discusses the design space domains of computing part of CPS. We identified domains where development of engineering solutions causes serious difficulties today. This problem is defined by complexity and inconsistency of technical specifications with the abundance of solutions and technologies offered on the market, which analysis and comparison are difficult. We give examples of the proposed design abstractions usage for the analysis and selection of engineering solutions at the architectural and microarchitectural level. © 2024 Proceedings of the international conferences on Applied computing and WWW/Internet 2024. All rights reserved.

关键词： Smart manufacturing

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Controlled availability of pervasive Web services

Controlled availability of pervasive Web services

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international conference on distributed computing systems Workshop

作者： P. Robinson S. Hild Computer Laboratory University of Cambridge Cambridge UK IBM Zurich Research Laboratory Ruschlikon Switzerland

The increasing use of computers to manage everyday business poses problems for workers when they are away from their home environment. There are two key problems: . How can a mobile worker share a limited part of their home environment with colleagues in a foreign environment while maintaining its security? . How can a mobile worker identify and interact with local services available in a foreign environment? This paper describes a scheme for controlling access to pervasive Web services together with a tangible user interface for their presentation.

关键词： Availability Web services User interfaces Pervasive computing Mobile computing Personal digital assistants Home computing Costs Environmental management Embedded computing

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Building auto-adaptive distributed applications: the QuO-APOD experience

Building auto-adaptive distributed applications: the QuO-APO...

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international conference on distributed computing systems Workshop

作者： M. Atighetchi P.P. Pal C.C. Jones P. Rubel R.E. Schantz J.P. Loyall J.A. Zinky BBN Technologies Limited Liability Company USA

Exploiting autonomic adaptation in defending a distributed application is a relatively new research area. We describe how the QuO adaptive middleware was used to implement auto-adaptive defenses ranging from simple rapid response sensor-actuator tactics to more sophisticated containment and outrun strategies. In addition, we report on two experiments where live red team attacks were used to evaluate our auto-adaptive defense technology.

关键词： Middleware Adaptive systems distributed computing Open source software Availability Contracts Software tools Performance evaluation Technology transfer Monitoring

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Job-shifting: An algorithm for online admission of non-preemptive aperiodic tasks in safety critical systems

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JOURNAL OF systems ARCHITECTURE 2018年 85-86卷 14-27页

作者： Syed, Ali Perez, Daniel Gracia Fohler, Gerhard Tech Univ Kaiserslautern Kaiserslautern Germany Thales Res & Technol Orsay France

Modern safety critical systems require certification in order to guarantee correct operation before system deployment. The certification process requires rigorous verification and validation, the efforts for which can be greatly reduced by using resource partitioning. However, Lackorzyriski et al. demonstrated that bandwidth reservation for event-triggered (ET) activities in partitioned systems may lead to significant bandwidth loss. In contrast, the online admission of ET activities can prevent bandwidth losses. However, the state-of-the-art approaches for online admission of ET activities fail to fulfill the requirements of safety critical systems as they do not support (i) partitioning, (ii) the industrial mixed-criticality task model or (iii) non-preemptive task execution. In this paper, we present job-shifting algorithm for online admission of non-preemptive aperiodic tasks in partitioned time-triggered environment. Our approach circumvents the bandwidth loss issue with partitioning, and provides guarantees similar to the bandwidth reservation technique such that the certification process of safety critical systems need not be modified. Our approach can be implemented on top of variety of hypervisors and can provide lower response-times for aperiodic tasks. Through evaluation, we demonstrate that our approach efficiently utilizes processor bandwidth and only incurs small scheduling overheads.

关键词： Real-time systems Scheduling algorithms Mixed-criticality Hierarchic scheduling Online aperiodic admission

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