The Experts below are selected from a list of 342 Experts worldwide ranked by ideXlab platform
Chun-hao Chen - One of the best experts on this subject based on the ideXlab platform.
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A distributed Server architecture supporting dynamic resource provisioning for BPM-oriented workflow Management systems
Journal of Systems and Software, 2010Co-Authors: Ching-hong Tsai, Kuo-chan Huang, Feng-jian Wang, Chun-hao ChenAbstract:Workflow Management systems have been widely used in many business process Management (BPM) applications. There are also a lot of companies offering commercial software solutions for BPM. However, most of them adopt a simple client/Server architecture with one single centralized workflow-Management Server only. As the number of incoming workflow requests increases, the single workflow-Management Server might become the performance bottleneck, leading to unacceptable response time. Development of parallel Servers might be a possible solution. However, a parallel Server architecture with a fixed-number of Servers cannot efficiently utilize computing resources under time-varying system workloads. This paper presents a distributed workflow-Management Server architecture which adopts dynamic resource provisioning mechanisms to deal with the probable performance bottleneck. We implemented a prototype system of the proposed architecture based on a commercial workflow Management system, Agentflow. A series of experiments were conducted on the prototype system for performance evaluation. The experimental results indicate that the proposed architecture can deliver scalable performance and effectively maintain stable request response time under a wide range of incoming workflow request workloads.
Bill Karakostas - One of the best experts on this subject based on the ideXlab platform.
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a peer to peer p2p architecture for dynamic workflow Management
Information & Software Technology, 2004Co-Authors: Georgios John Fakas, Bill KarakostasAbstract:Abstract This paper presents the architecture of a novel Peer to Peer (P2P) workflow Management system. The proposed P2P architecture is based on concepts such as a Web Workflow Peers Directory (WWPD) and Web Workflow Peer (WWP). The WWPD is an active directory system that maintains a list of all peers (WWPs) that are available to participate in Web workflow processes. Similar to P2P systems such as Napster and Gnutella, it allows peers to register with the system and offer their services and resources to other peers over the Internet. Furthermore, the architecture supports a novel notification mechanism to facilitate distributed workflow administration and Management. Employing P2P principles can potentially simplify the workflow process and provide a more open, scalable process model that is shared by all workflow participants. This would enable for example a WWP to connect directly to another without going through an intermediary, currently represented by the workflow process Management Server. P2P workflow becomes more efficient as the number of peers performing the same role increases. Available peers can be discovered dynamically from the WWPD. The few currently existing P2P based workflow systems fail to utilise state of the art Web technologies such as Web Services. In contrast, using the approach described here it is possible to expose interoperable workflow processes over the Internet as services. A medical consultation case study is used to demonstrate the proposed system.
Ching-hong Tsai - One of the best experts on this subject based on the ideXlab platform.
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A distributed Server architecture supporting dynamic resource provisioning for BPM-oriented workflow Management systems
Journal of Systems and Software, 2010Co-Authors: Ching-hong Tsai, Kuo-chan Huang, Feng-jian Wang, Chun-hao ChenAbstract:Workflow Management systems have been widely used in many business process Management (BPM) applications. There are also a lot of companies offering commercial software solutions for BPM. However, most of them adopt a simple client/Server architecture with one single centralized workflow-Management Server only. As the number of incoming workflow requests increases, the single workflow-Management Server might become the performance bottleneck, leading to unacceptable response time. Development of parallel Servers might be a possible solution. However, a parallel Server architecture with a fixed-number of Servers cannot efficiently utilize computing resources under time-varying system workloads. This paper presents a distributed workflow-Management Server architecture which adopts dynamic resource provisioning mechanisms to deal with the probable performance bottleneck. We implemented a prototype system of the proposed architecture based on a commercial workflow Management system, Agentflow. A series of experiments were conducted on the prototype system for performance evaluation. The experimental results indicate that the proposed architecture can deliver scalable performance and effectively maintain stable request response time under a wide range of incoming workflow request workloads.
Georgios John Fakas - One of the best experts on this subject based on the ideXlab platform.
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a peer to peer p2p architecture for dynamic workflow Management
Information & Software Technology, 2004Co-Authors: Georgios John Fakas, Bill KarakostasAbstract:Abstract This paper presents the architecture of a novel Peer to Peer (P2P) workflow Management system. The proposed P2P architecture is based on concepts such as a Web Workflow Peers Directory (WWPD) and Web Workflow Peer (WWP). The WWPD is an active directory system that maintains a list of all peers (WWPs) that are available to participate in Web workflow processes. Similar to P2P systems such as Napster and Gnutella, it allows peers to register with the system and offer their services and resources to other peers over the Internet. Furthermore, the architecture supports a novel notification mechanism to facilitate distributed workflow administration and Management. Employing P2P principles can potentially simplify the workflow process and provide a more open, scalable process model that is shared by all workflow participants. This would enable for example a WWP to connect directly to another without going through an intermediary, currently represented by the workflow process Management Server. P2P workflow becomes more efficient as the number of peers performing the same role increases. Available peers can be discovered dynamically from the WWPD. The few currently existing P2P based workflow systems fail to utilise state of the art Web technologies such as Web Services. In contrast, using the approach described here it is possible to expose interoperable workflow processes over the Internet as services. A medical consultation case study is used to demonstrate the proposed system.
Kuo-chan Huang - One of the best experts on this subject based on the ideXlab platform.
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A distributed Server architecture supporting dynamic resource provisioning for BPM-oriented workflow Management systems
Journal of Systems and Software, 2010Co-Authors: Ching-hong Tsai, Kuo-chan Huang, Feng-jian Wang, Chun-hao ChenAbstract:Workflow Management systems have been widely used in many business process Management (BPM) applications. There are also a lot of companies offering commercial software solutions for BPM. However, most of them adopt a simple client/Server architecture with one single centralized workflow-Management Server only. As the number of incoming workflow requests increases, the single workflow-Management Server might become the performance bottleneck, leading to unacceptable response time. Development of parallel Servers might be a possible solution. However, a parallel Server architecture with a fixed-number of Servers cannot efficiently utilize computing resources under time-varying system workloads. This paper presents a distributed workflow-Management Server architecture which adopts dynamic resource provisioning mechanisms to deal with the probable performance bottleneck. We implemented a prototype system of the proposed architecture based on a commercial workflow Management system, Agentflow. A series of experiments were conducted on the prototype system for performance evaluation. The experimental results indicate that the proposed architecture can deliver scalable performance and effectively maintain stable request response time under a wide range of incoming workflow request workloads.
