Pub Date : 2001-10-08DOI: 10.1109/CMPSAC.2001.960625
Lap-Sun Cheung, Yu-Kwong Kwok
Several load balancing schemes have been proposed for distributed object computing systems, which are widely envisioned to be the desired distributed software development paradigm due to the higher modularity and the capability of handling machine and operating system heterogeneity. However, while the rationales and mechanisms employed are dramatically different, the relative strengths and weaknesses of these approaches are unknown, making it difficult for a practitioner to choose an appropriate approach for the problem at hand. In this paper, we describe in detail three representative approaches, which are all practicable, and present a quantitative comparison using our experimental distributed object computing platform. Among these three approaches, namely, JavaSpaces based, request redirection based, and fuzzy decision based, we find that the fuzzy decision based algorithm outperforms the other two considerably.
{"title":"A quantitative comparison of load balancing approaches in distributed object computing systems","authors":"Lap-Sun Cheung, Yu-Kwong Kwok","doi":"10.1109/CMPSAC.2001.960625","DOIUrl":"https://doi.org/10.1109/CMPSAC.2001.960625","url":null,"abstract":"Several load balancing schemes have been proposed for distributed object computing systems, which are widely envisioned to be the desired distributed software development paradigm due to the higher modularity and the capability of handling machine and operating system heterogeneity. However, while the rationales and mechanisms employed are dramatically different, the relative strengths and weaknesses of these approaches are unknown, making it difficult for a practitioner to choose an appropriate approach for the problem at hand. In this paper, we describe in detail three representative approaches, which are all practicable, and present a quantitative comparison using our experimental distributed object computing platform. Among these three approaches, namely, JavaSpaces based, request redirection based, and fuzzy decision based, we find that the fuzzy decision based algorithm outperforms the other two considerably.","PeriodicalId":269568,"journal":{"name":"25th Annual International Computer Software and Applications Conference. COMPSAC 2001","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121851012","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}
Pub Date : 2001-10-08DOI: 10.1109/CMPSAC.2001.960615
Galo Gimenez, K. Kim
The time-triggered message-triggered object (TMO) programming scheme has been established to remove the limitation of conventional object programming techniques and tools in developing applications containing real-time (RT) distributed computing components. It is a unified approach for efficient design and implementation of both RT and non-RT distributed applications. As a cost-effective facility for supporting TMO-structured distributed RT programming, a middleware architecture that can be adapted to various well-established commercial software/hardware platforms has been established. It has been named the TMO support middleware (TMOSM). In this paper, an adaptation of TMOSM to the Windows CE platform is discussed. The internal structure of the prototype implementation, TMOSM/CE, and some implementation techniques adopted are discussed.
{"title":"A Windows CE implementation of a middleware architecture supporting time-triggered message-triggered objects","authors":"Galo Gimenez, K. Kim","doi":"10.1109/CMPSAC.2001.960615","DOIUrl":"https://doi.org/10.1109/CMPSAC.2001.960615","url":null,"abstract":"The time-triggered message-triggered object (TMO) programming scheme has been established to remove the limitation of conventional object programming techniques and tools in developing applications containing real-time (RT) distributed computing components. It is a unified approach for efficient design and implementation of both RT and non-RT distributed applications. As a cost-effective facility for supporting TMO-structured distributed RT programming, a middleware architecture that can be adapted to various well-established commercial software/hardware platforms has been established. It has been named the TMO support middleware (TMOSM). In this paper, an adaptation of TMOSM to the Windows CE platform is discussed. The internal structure of the prototype implementation, TMOSM/CE, and some implementation techniques adopted are discussed.","PeriodicalId":269568,"journal":{"name":"25th Annual International Computer Software and Applications Conference. COMPSAC 2001","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132159913","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}
Pub Date : 2001-10-08DOI: 10.1109/CMPSAC.2001.960605
C. Hofmeister, R. Nord
Although originally developed to describe OO design, today UML is also being used to describe software architecture. However, using the same notation for different levels of abstraction can create confusion. In this paper we illustrate some of the important differences between software architecture models and implementation models in UML.
{"title":"From software architecture to implementation with UML","authors":"C. Hofmeister, R. Nord","doi":"10.1109/CMPSAC.2001.960605","DOIUrl":"https://doi.org/10.1109/CMPSAC.2001.960605","url":null,"abstract":"Although originally developed to describe OO design, today UML is also being used to describe software architecture. However, using the same notation for different levels of abstraction can create confusion. In this paper we illustrate some of the important differences between software architecture models and implementation models in UML.","PeriodicalId":269568,"journal":{"name":"25th Annual International Computer Software and Applications Conference. COMPSAC 2001","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126274983","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}
Pub Date : 2001-10-08DOI: 10.1109/CMPSAC.2001.960651
S. Kamouskos
Denial of service (DoS) attacks is a well-known problem with victims even among prestigious commercial sites. Such attacks in traditional networking are difficult to recognize and to handle. An active infrastructure that can dynamically respond to event-triggered requests can deal better with recognition and handling of DoS attacks. We present a DoS attack response system architecture and we demonstrate via an application scenario its dynamicity and flexibility in dealing with this kind of attack. The approach is based on agent-enabled active programmable infrastructures and makes heavy use of mobile agent technology in order to asynchronously respond to critical situations. Finally, we comment on the pros and cons of our approach and discuss future directions that could be followed.
{"title":"Dealing with denial-of-service attacks in agent-enabled active and programmable infrastructures","authors":"S. Kamouskos","doi":"10.1109/CMPSAC.2001.960651","DOIUrl":"https://doi.org/10.1109/CMPSAC.2001.960651","url":null,"abstract":"Denial of service (DoS) attacks is a well-known problem with victims even among prestigious commercial sites. Such attacks in traditional networking are difficult to recognize and to handle. An active infrastructure that can dynamically respond to event-triggered requests can deal better with recognition and handling of DoS attacks. We present a DoS attack response system architecture and we demonstrate via an application scenario its dynamicity and flexibility in dealing with this kind of attack. The approach is based on agent-enabled active programmable infrastructures and makes heavy use of mobile agent technology in order to asynchronously respond to critical situations. Finally, we comment on the pros and cons of our approach and discuss future directions that could be followed.","PeriodicalId":269568,"journal":{"name":"25th Annual International Computer Software and Applications Conference. COMPSAC 2001","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125066331","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}
Pub Date : 2000-10-01DOI: 10.1109/CMPSAC.2001.960650
J. A. D. Pace, M. Fayad, Federico Trilnik, M. Campo
Enforcing framework adaptability is one of the key points in the process of building an object-oriented application framework. When it comes to simulation, some adaptation mechanisms to configure components on-the-fly are usually required in order to produce quality software artifacts and alleviate development effort. The paper reports on an experience using a simulation multi-agent framework, initially conceived to be used in fluid flow problems. The framework architecture demonstrated during its evolution a great potential regarding to flexibility and modularity, tackling a wide range of other problems ranging from a network protocol simulation to a soccer simulation.
{"title":"Accomplishing adaptability in simulation frameworks: the Bubble approach","authors":"J. A. D. Pace, M. Fayad, Federico Trilnik, M. Campo","doi":"10.1109/CMPSAC.2001.960650","DOIUrl":"https://doi.org/10.1109/CMPSAC.2001.960650","url":null,"abstract":"Enforcing framework adaptability is one of the key points in the process of building an object-oriented application framework. When it comes to simulation, some adaptation mechanisms to configure components on-the-fly are usually required in order to produce quality software artifacts and alleviate development effort. The paper reports on an experience using a simulation multi-agent framework, initially conceived to be used in fluid flow problems. The framework architecture demonstrated during its evolution a great potential regarding to flexibility and modularity, tackling a wide range of other problems ranging from a network protocol simulation to a soccer simulation.","PeriodicalId":269568,"journal":{"name":"25th Annual International Computer Software and Applications Conference. COMPSAC 2001","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126675574","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}
Pub Date : 1900-01-01DOI: 10.1109/CMPSAC.2001.960607
A. Barros, A. Hofstede, C. Szyperski
Sudden and significant demand for B2B process automation has seen the entry of workflow management systems (WFMS) into the component arena. Workflows offer highly expressive and graphical process control constructs for the coordinative component assembly, however, current provisions seem more suitable for internal process pipelines in single organizations, built without future reuse in mind. In this paper, we identify particular areas of workflow legacy which obstruct flexible reuse and composition under B2B assembly. New abstractions are identified for the tighter multi-lateral coupling of workflows such that: synchronization is possible across encapsulated workflows boundaries and external interactions occur through blackbox interfaces. Against the stifled efforts of loosely-coupled WFMS interoperability, a top-down architectural strategy is charted, where regulation can occur "above" workflow components - at a higher-tier workflow component framework accepting heterogeneous WFMSs as "plug-ins".
{"title":"Retrofitting workflows for B2B component assembly","authors":"A. Barros, A. Hofstede, C. Szyperski","doi":"10.1109/CMPSAC.2001.960607","DOIUrl":"https://doi.org/10.1109/CMPSAC.2001.960607","url":null,"abstract":"Sudden and significant demand for B2B process automation has seen the entry of workflow management systems (WFMS) into the component arena. Workflows offer highly expressive and graphical process control constructs for the coordinative component assembly, however, current provisions seem more suitable for internal process pipelines in single organizations, built without future reuse in mind. In this paper, we identify particular areas of workflow legacy which obstruct flexible reuse and composition under B2B assembly. New abstractions are identified for the tighter multi-lateral coupling of workflows such that: synchronization is possible across encapsulated workflows boundaries and external interactions occur through blackbox interfaces. Against the stifled efforts of loosely-coupled WFMS interoperability, a top-down architectural strategy is charted, where regulation can occur \"above\" workflow components - at a higher-tier workflow component framework accepting heterogeneous WFMSs as \"plug-ins\".","PeriodicalId":269568,"journal":{"name":"25th Annual International Computer Software and Applications Conference. COMPSAC 2001","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132540179","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}
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