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11th IEEE symposium on object/Component/Service-oriented real-time distributed computing

作者： Lee, Joonwoo Hwang, Jaeil Shin, Dong-Hoon Nah, Yunmook Bae, Hae-Young Kim, Doo-Hyun Dankook Univ Gyeonggi Do South Korea Inha Univ Incheon South Korea Konan Univ Seoul South Korea

ISBN: (纸本)9780769531328

As ITS technology evolves, very large volume of traffic data can be obtained in real-time. Traffic data are continuously produced and they can be considered as a kind of stream data. Currently, such traffic data are not maintained permanently because of the storage limitations of operational systems. Therefore, it was impossible to compare temporal historical patterns over long time periods. In this paper, we propose a traffic data management scheme, which can handle historical data as well as current data. The proposed scheme is based on the GALIS architecture, which is a cluster-based distributed computing system architecture that consists of multiple data processors, each dedicated to keeping records relevant to a different geographical zone and a different time zone. Some experimental results showing performance factors are also explained.

关键词： Information management

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Non-functional information transmission patterns for distributed real-time Java

Non-functional information transmission patterns for distrib...

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13th IEEE international symposium on object/Component/Service-oriented real-time distributed computing (ISORC)

作者： Basanta-Val, P. Garcia-Valls, M. Estevez-Ayres, I. Univ Carlos III Madrid DREQUIEM Lab Madrid Spain

Many real-time systems use preemptive priority-based scheduling in their internals to guarantee certain real-time performance. This includes technologies that range from The real-time Specification for Java (RTSJ) to middleware like real-time Common object Request Broker Architecture (RT-CORBA), which offers additional models and policies that blend client and server information. This decision eases the integration of real-time admission tests and dispatching policies in these types of infrastructures. In this paper, we analyze different trade-offs that emerge from the definition of different propagation models for distributed real-time Java. The paper covers technological integration aspects as impact on interfaces and other practical issues mainly related to the performance that this model offers to a real-time application and non-functional overhead. The contribution described in the paper may help in the development of The distributed Specification for Java (DRTSJ). Copyright (C) 2011 John Wiley & Sons, Ltd.

关键词： RTSJ DRSTJ RT-JRMP RT-RMI

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Adapting system execution traces for validation of distributed system QoS properties

Adapting system execution traces for validation of distribut...

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15th IEEE international symposium on object/Component/Service-oriented real-time distributed computing, ISORC 2012

作者： Peiris, T. Manjula Hill, James H. Dept. of Computer and Information Science Indiana University-Purdue University Indianapolis Indianapolis IN United States

ISBN: (纸本)9780769546438

System execution traces are useful artifacts for validating distributed system quality-of-service (QoS) properties, such as end-to-end response time, throughput, and service time. With proper planning during development phase of the software lifecycle, it is possible to ensure such traces contain required properties to facilitate analysis for QoS validation. In some case, however, it is not possible to ensure system execution traces contain the necessary properties for QoS analysis. This paper presents the System Execution Trace Adaptation Framework (SETAF) for adapting system execution traces to support analysis of QoS properties. It also presents results from applying SETAF to externally developed applications. The results show that it is possible to validate QoS properties by automatically adapting system execution traces at analysis time instead of modifying the application's existing source code. © 2012 IEEE.

关键词： Quality of service

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HIDOORS - A high integrity distributed deterministic Java environment 7

HIDOORS - A high integrity distributed deterministic Java en...

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7th IEEE international Workshop on object-oriented real-time Dependable Systems (WORDS 2002)

作者： Ventura, J Siebert, F Walter, A Hunt, J Skysoft Portugal Portugal aicas GmbH Germany Forschungszentrum Informatik Germany

ISBN: (纸本)0769515762

This paper presents the design of HIDOORS, an integrated development environment suitable for embedded distributed real-time systems, based on the Java programming language. HIDOORS will cover all the life-cycle of real-time software development with extensions to existing tools (UML modeling, Java compiler, Java Virtual Machine, and a worst case execution time analysis tool) that will all be integrated into a single integrated development environment. The system will also assist the developer in distributing the application, by, providing faster RMI and a distributed event manager that provides strict timing guarantees. This paper is written at the beginning of HIDOORS development, and as such, it presents only the defined objectives and the early, architecture of the system;further developments will be the subject of future works.

关键词： Application software Computer languages Electrical equipment industry Embedded computing Embedded system Java Memory management Programming real time systems Safety

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distributed load balancing in heterogeneous peer-to-peer networks for web computing libraries 06

Distributed load balancing in heterogeneous peer-to-peer net...

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10th IEEE international symposium on distributed Simulation and real-time Applications

作者： Gehweiler, Joachim Schomaker, Gunnar Univ Gesamthsch Paderborn Heinz Nixdorf Inst Warburger Str 100 D-4790 Paderborn Germany

ISBN: (纸本)0769526977

In this work we present a novel architecture for distributed computing in a peer-to-peer network. In particular, we realize the Paderborn University BSP-based Web computing Library (PUBWCL), which was formerly used as a centralized client-server architecture for scheduling and load balancing, as a pure peer-to-peer system. By using distributed heterogeneous hash tables (DHHT), our architecture-features scheduling and load balancing of tightly coupled, massively parallel algorithms in the bulk-synchronous (BSP) style with a minimal number of migrations. Furthermore, our architecture is capable of heterogeneous BSP programs whereas the former version of PUBWCL could only handle homogeneous BSP programs.

关键词： Peer to peer computing Load management Computer networks distributed computing Libraries Computer architecture Network servers Service oriented architecture Processor scheduling Web server

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Implementing the multicast Inter-ORB protocol 6

Implementing the multicast Inter-ORB protocol

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6th IEEE international symposium on object-oriented real-time distributed computing, ISORC 2003

作者： Bessani, A.N. Da Silva Fraga, J. Lung, Lau Cheuk DAS CTC UFSC Campus Universitário Caixa Postal 476 - Trindade FlorianópolisSCCEP 88040-900 Brazil Graduate Program in Applied Computer Science Exact Sciences and Technology Center Pontifical Catholic University of Paraná CuritibaParaná Brazil

ISBN: (纸本)0769519288

This paper presents our experiments for integrating OMG MIOP (Mullicast Inter-ORB Protocol) specifications into a CORBA ORB. We proposed an integration model which allows the coexistence of two different protocol stacks (IIOP/TCP/IP and MIOP/UDP/IP multicast), making possible a large spectrum of middleware support for distributed objects communication. That integration model is discussed in this paper, giving evidence of the compatibility of our approach with the CORBA specifications. We also do some considerations about the implementation of this model in a CORBA compliant ORB. © 2003 IEEE.

关键词： Common object request broker architecture (CORBA)

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Adlets migration and handling in a distributed object environment 3

Adlets migration and handling in a distributed object enviro...

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3rd IEEE international symposium on object-oriented real-time distributed computing, ISORC 2000

作者： Gharib, H.I. Chen, Ping-Wen Kawata, Y. Chang, Shi-Kuo Department of Computer Science University of Pittsburgh PittsburghPA15260 United States

ISBN: (纸本)0769506070

Large distributed systems may contain millions of objects that have to be managed. This makes it impossible to specify management policies for individual objects. Instead it is necessary to specify policy for groups of objects. This paper describes a framework for the construction of the ADlets distributed Migration Mechanism (ADDMM), which is used by the Adlet System for the management of adlets. The Adlet System is a new approach for multimedia information retrieval and fusion based on the concept of active document advertising, whereby an adlet (the metadata of a document) travels in the network to seek out documents of interest to the parent document, and at the same time advertises its parent document to other interested adlets. ADDMM provides the Adlet System with the facility of managing migrating adlets. ADDMM supports location-independent transparency and minimal interface by utilizing the ADDNS naming system that provides a mechanism for transparent naming and locating adlets, which in turn supports ADDMM transparency at the adlet access level. With the ADDMM migration mechanism, various adlet migration protocols can be constructed and deployed. A visual diagram is introduced to specify such protocols for adlets migration, which can also be employed to specify distributed object management policies. © 2000 IEEE.

关键词： Transparency

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An object-oriented multitasking control environment for multirobot system programming and execution with 3D graphic simulation

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international JOURNAL OF PRODUCTION ECONOMICS 1999年 60-1卷 241-250页

作者： Yasuda, GI Nagasaki Inst Appl Sci Fac Engn Dept Mech Engn Nagasaki 85101 Japan

This paper describes an object-oriented distributed control environment for industrial multirobot applications. A distributed computing environment, where workpieces, robots, and other industrial devices such as a vision sensor are defined as software objects with class inheritance hierarchy, supports human-friendly task-level programming and automated robot program generation with 3D graphic simulation, and performs supervisory and real-time sensor-based coordinated control of multirobot systems. Using object-oriented multitasking control with a preemptive rescheduler, vision-based robot positioning and pick and place operations for exchange of a workpiece are demonstrated to validate the control performance of the computing environment. (C) 1999 Elsevier Science B.V. All rights reserved.

关键词： intelligent autonomous robot systems object-oriented modeling distributed processing 3D graphic simulation

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A fault-tolerant transactional agent model on distributed objects

A fault-tolerant transactional agent model on distributed ob...

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9th IEEE international symposium on object and Component-oriented real-time distributed computing

作者： Tanaka, Youhei Hayashibara, Naohiro Enokido, Tornoya Takizawa, Makoto Tokyo Denki Univ Tokyo 101 Japan Rissho Univ Tokyo Japan

ISBN: (纸本)076952561X

A transactional agent is a mobile agent to manipulate objects distributed on computers with some type of commitment condition. For example, a transactional agent commits only if at least one object could be successfully manipulated in the at-least-one commitment condition. Computers may stop by fault while networks are assumed to be reliable. In the client-server model, servers can be fault-tolerant according to traditional replication and checkpointing technologies. However, an application program cannot be performed if a client computer is faulty An application program can be performed on another operational computer even if a computer is faulty in the transactional agent model. For example, a transactional agent can move to another operational computer if some destination computer where the agent to move is faulty There are kinds of faulty computers for a transactional agent, current, destination, and sibling computers where a transactional agent now exist, will move, and has visited, respectively. We discuss how the transactinal agent can be tolerant of the types of faults. We show how a program reliably manipulating objects can be realized in a mobile agent in presence of computer faults.

关键词： Fault tolerant computer systems

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A tree-driven multiple-rate model of time measuring in object-oriented real-time systems 12th

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10 IPPS/SPDP 98 Workshops Held in Conjunction with the 12th international Parallel Processing symposium / 9th symposium on Parallel distributed Processing

作者： Mincev, V Milicev, D IRITEL Inst Telecommun & Elect Belgrade Yugoslavia Univ Belgrade Belgrade Yugoslavia

ISBN: (纸本)3540643591

This paper addresses the problem of measuring time in object-oriented event-driven real-time systems. Several possible implementations of the timing subsystem are considered. Some important consequences that an implementation can have on the overall time overhead are discussed. The paper proposes a modified multiple-rate policy of updating software timers. Timing ticks are distributed through a tree structure in a way that tends to minimize the overall overhead, while retaining a small variation of the overhead in different clock cycles. The paper presents the results of a comparative analysis of the described models. The analysis considers different exploitation conditions, in respect to the number of software timers and their resolutions.

关键词： object-oriented real-time systems event-driven systems time measuring

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