Proceedings of the International Symposium on Distributed Objects and Applications最新文献

Integrating capabilities into the object model to protect distributed object systems 将功能集成到对象模型中，以保护分布式对象系统

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.794067

M. Díaz-Fondón, D. Álvarez-Gutiérrez, A. García-Mendoza-Sánchez, F. Álvarez-García, L. Tajes-Martínez, J.M. Cueva-Lovelle

引用次数: 2

Failure detectors as first class objects 作为第一类对象的故障检测器

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.794001

P. Felber, X. Défago, R. Guerraoui, Philipp Oser

{"title":"Failure detectors as first class objects","authors":"P. Felber, X. Défago, R. Guerraoui, Philipp Oser","doi":"10.1109/DOA.1999.794001","DOIUrl":"https://doi.org/10.1109/DOA.1999.794001","url":null,"abstract":"One of the fundamental differences between a centralized system and a distributed one is the notion of partial failures. The ability to efficiently and accurately detect failures is a key element underlying reliable distributed computing. In current distributed systems, however, failure detection is either left to the application developer or hidden from the programmer and provided in an ad-hoc manner behind the scenes. We plead for an intermediate approach where failure detectors are first-class objects. We view failure detection as an abstraction, the complexity of which is encapsulated behind well-defined interfaces. The various roles of a failure detection service are all represented as first-class objects. Following our approach, one can reuse existing failure detection protocols as they are, or, through composition or refinement, one can define new protocols that match the application requirements. We describe an interesting result of a composition that mixes push and pull failure monitoring, and we show how scalability issues may be addressed by using a hierarchical failure detection configuration. We also discuss the implementation of our failure service both in CORBA and in Java.","PeriodicalId":360176,"journal":{"name":"Proceedings of the International Symposium on Distributed Objects and Applications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129220525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 115

High performance distributed objects using caching proxies for large scale applications 为大规模应用程序使用缓存代理的高性能分布式对象

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.793995

Paul Martin, V. Callaghan, A. Clark

{"title":"High performance distributed objects using caching proxies for large scale applications","authors":"Paul Martin, V. Callaghan, A. Clark","doi":"10.1109/DOA.1999.793995","DOIUrl":"https://doi.org/10.1109/DOA.1999.793995","url":null,"abstract":"Initial implementations of middleware based on standards such as CORBA have concentrated on host and language transparency issues in order to demonstrate interoperability. They have largely adopted a no-replication approach and have frequently neglected performance-at-scale issues. This has led to continuing deployment of either non-scalable full-replication approaches or ad-hoc messaging-based middleware for applications such as intelligent networks, WWW applications and collaborative virtual reality. These applications require millions of objects globally distributed across hundreds of hosts and demand a very high throughput of low-latency method invocations. Our main research aim is to be able to reason about the performance of such applications when using scalable partial-replication and object-oriented approaches to middleware. Our approach is to use a simulator to explore potential design and implemention choices. Our current simulator-driven design, called \"MinORB\", has been fully implemented and tested. MinORB supports scalable high performance by a combination of techniques, including weak and application-specified consistency and partial replication using fine-grained proxy caching. Experimental results show that our work compares very favourably with other leading implementations, such as OmniORB. Scalability is unparalleled, with up to 1,000,000,000 objects per address space, a maximum throughput of 42,000 invocations per second and service times as low as 4 ms.","PeriodicalId":360176,"journal":{"name":"Proceedings of the International Symposium on Distributed Objects and Applications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121601958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

CORBA-based architecture for image workflow in a large consortium of hospitals 基于corba的大型医院联合体图像工作流体系结构

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.794040

O. Bukhres, Dong Hoang

{"title":"CORBA-based architecture for image workflow in a large consortium of hospitals","authors":"O. Bukhres, Dong Hoang","doi":"10.1109/DOA.1999.794040","DOIUrl":"https://doi.org/10.1109/DOA.1999.794040","url":null,"abstract":"Technology advances in digital imaging modalities and high speed network have enabled physicians to store digital medical images and integrate them with a patient's text information for fast access by computer. The Picture Archiving and Communication System (PACS) is an archival system for digital medical images. It can deliver images to a physician through user friendly interfaces for interpretation, diagnosis and study. While these technology advances support a large-scale filmless environment in radiology departments, they do not adequately support workflow management. Thus they have very limited use for streamline, automated, and monitoring processes. The paper presents the characteristics and system requirements of an Image Workflow Management System (IWFMS) in a large-scale consortium of hospitals. The paper outlines a run-time object oriented architecture for the implementation of IWFMS. This system is general purpose, open and consists of three layers: coordination, service and tasks. The components in each layer have been designed and implemented as a set of CORBA services that provides seamless integration of flexible high level CORBA distributed object computing middleware with low level image data management.","PeriodicalId":360176,"journal":{"name":"Proceedings of the International Symposium on Distributed Objects and Applications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133031590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Multicast group communication for CORBA CORBA的多播组通信

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.793993

L. Moser, P. Melliar-Smith, P. Narasimhan, R. Koch, K. Berket

引用次数: 13

An agent-based search engine based on the Internet search service on the CORBA 基于CORBA的Internet搜索服务的基于agent的搜索引擎

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.793979

Yue-Shan Chang, Hsin-Chun Hsieh, S. Yuan, Win-Tsung Lo

引用次数: 7

Active COM: an inter-working framework for CORBA and DCOM 活动COM: CORBA和DCOM的交互框架

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.794029

J. Daniel, B. Traverson, Vincent Vallée

引用次数: 8

Interoperability of Java-based applications and SAP's business framework state of the art and desirable developments 基于java的应用程序和SAP的业务框架的互操作性，以及理想的开发状态

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.794024

M. Aleksy, Axel Korthaus

引用次数: 3

Load distribution in a CORBA environment CORBA环境中的负载分布

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.794010

T. Barth, Gerd Flender, Bernd Freisleben, F. Thilo

引用次数: 35

PJRMI: remote method invocation for a persistent system PJRMI:持久系统的远程方法调用

Proceedings of the International Symposium on Distributed Objects and Applications Pub Date : 1999-09-05 DOI: 10.1109/DOA.1999.793983

Susan Spence

引用次数: 9