In this paper we discuss use of WebFlow for a seamless access to remote resources. We illustrate ... more In this paper we discuss use of WebFlow for a seamless access to remote resources. We illustrate our ideas with two WebFlow applications that require access to remote resources: the Landscape Management System (LMS) and Quantum Simulations (QS). For LMS we use WebFlow to retrieve data from many different sources as well as to allocate remote computational resources needed to solve the problem at hand. WebFlow transparently for the user controls the necessary data transfer between hosts. Quantum Simulations requires access to HPCC resources and therefore we layered WebFlow on top of Globus metacomputing toolkit. This way WebFlow plays the role of a job broker for Globus. We admit that WebFlow does not comprise a complete solution yet for the seamless access to remote resources. Many issues, notably security, still remain to be solved. We expect to leverage from the recent DATORR (Desktop Access to Remote Resources) initiative of the Java Grande Forum when tackling these issues. Overv...
We developed a platform independent, three-tier system, called WebFlow. The visual authoring tool... more We developed a platform independent, three-tier system, called WebFlow. The visual authoring tools implemented in the front end integrated with the middle tier network of servers based on CORBA and following distributed object paradigm, facilitate seamless integration of commodity software components. We add high performance to commodity systems using GLOBUS metacomputing toolkit as the backend. Programming tools that are simultaneously sustainable, highly functional, robust and easy to use have been hard to come by in the HPCC arena. This is partially due to the difficulty in developing sophisticated customized systems for what is a relatively small part of the worldwide computing enterprise. Thus we have developed a new strategy- termed HPcc High Performance Commodity Computing [1]- which
Summary We present here an approach towards visual authoring environments for Web/Commodity based... more Summary We present here an approach towards visual authoring environments for Web/Commodity based distributed object/omponentwarecomputing using the WebFlow system under development at NPAC as a case study. WebFlow is a 3-tier Java based visual dataflowsystem with applets based authoring, visualization and control front-ends, and with servlets based middleware management ofbackend modules that wrap legacy codes such as databases or high performance simulations. We summarize here the WebFlowarchitecture, we describe a set of demos and early applications in various areas of distributed computing (including imaging, col-laboration, condensed matter physics and military wargaming simulations), and we outline the next phase design, based on lesson slearned in the current prototype. New WebFlow uses JWORB (Java Web Object Request Broker) middleware and employsWOMA (Web Object Management Architecture) methodology to establish a testbed for testing, evaluating and integrating theemergent com...
This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). T... more This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). The Web-based implementation extends the Watershed Modeling System by adding the capability to download the input data directly from the Internet, and execute the simulation codes on a remote high-performance host. This makes it possible to run LMS anywhere from a networked laptop. Furthermore, our system allows for constructing complex simulations by coupling several independently developed codes into a single, distributed application. The Web-based LMS is implemented as a WebFlow application. WebFlow is a modern three-tier commodity standards-based High Performance Distributed Computing (HPDC) system that integrates a high-level graphical user interface (Tier 1), distributed scalable object broker middleware (Tier 2), and a high-performance back end (Tier 3).
Abstract This paper describes a pilot Web-based implementation of the Landscape Management System... more Abstract This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). The Web-based implementation extends the Watershed Modeling System by adding the capability to download the input data directly from the Internet, and execute the simulation codes on a remote high-performance host. This makes it possible to run LMS anywhere from a networked laptop. Furthermore, our system allows for constructing complex simulations by coupling several independently developed codes ...
Programming tools that are simultaneously sustainable, highly functional, robust and easy to use ... more Programming tools that are simultaneously sustainable, highly functional, robust and easy to use have been hard to come by in the HPCC arena. Thus we have developed a new strategy, HPcc: High Performance Commodity Computing, which builds HPCC programming tools on top of the remarkable new software infrastructure being built for the commercial web and distributed-object areas. This leverage of a huge industry investment naturally delivers tools with the desired properties with the one (albeit critical) exception that high performance is not guaranteed. Our approach automatically gives the user access to the full range of commercial capabilities (e.g., databases and compute servers), pervasive access from all platforms, and natural incremental enhancement as the industry software juggernaut continues to deliver software systems of rapidly increasing power. We add high performance to commodity systems using a multi-tiered architecture with the Globus meta-computing toolkit as the backe...
Programming tools that are simultaneously sustainable, highly functional, robust and easy to use ... more Programming tools that are simultaneously sustainable, highly functional, robust and easy to use have been hard to come by in the HPCC arena. This is partially due to the difficulty in developing sophisticated customized systems for what is a relatively small part of the worldwide computing enterprise. Thus we have developed a new strategytermed HPcc High Performance Commodity Computing[1]-which builds HPCC programming tools on top of the remarkable new software infrastructure being built for the commercial web and distributed object areas. We add high performance to commodity systems using multi tier architecture with GLOBUS metacomputing toolkit as the backend of a middle tier of commodity web and object servers. We have demonstrated the fully functional prototype of WebFlow during Alliance'98 meeting.
Abstract: In this paper we discuss use of WebFlow for a seamless access to remote resources. We i... more Abstract: In this paper we discuss use of WebFlow for a seamless access to remote resources. We illustrate our ideas with two WebFlow applications that require access to remote resources: the Landscape Management System (LMS) and Quantum Simulations (QS). For LMS we use WebFlow to retrieve data from many different sources as well as to allocate remote computational resources needed to solve the problem at hand. WebFlow transparently for the user controls the necessary data transfer between hosts. Quantum ...
Summary We present here an approach towards visual authoring environments for Web/Commodity based... more Summary We present here an approach towards visual authoring environments for Web/Commodity based distributed object/omponentware computing using the WebFlow system under development at NPAC as a case study. WebFlow is a 3-tier Java based visual dataflow system with applets based authoring, visualization and control front-ends, and with servlets based middleware management of backend modules that wrap legacy codes such as databases or high performance simulations. We summarize here the WebFlow ...
A WebFlow Application Technical Report, Apr 1, 1999
This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). T... more This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). The Web-based implementation extends the Watershed Modeling System by adding the capability to download the input data directly from the Internet, and execute the simulation codes on a remote high-performance host. This makes it possible to run LMS anywhere from a networked laptop. Furthermore, our system allows for constructing complex simulations by coupling several independently developed codes ...
In this paper we discuss use of WebFlow for a seamless access to remote resources. We illustrate ... more In this paper we discuss use of WebFlow for a seamless access to remote resources. We illustrate our ideas with two WebFlow applications that require access to remote resources: the Landscape Management System (LMS) and Quantum Simulations (QS). For LMS we use WebFlow to retrieve data from many different sources as well as to allocate remote computational resources needed to solve the problem at hand. WebFlow transparently for the user controls the necessary data transfer between hosts. Quantum Simulations requires access to HPCC resources and therefore we layered WebFlow on top of Globus metacomputing toolkit. This way WebFlow plays the role of a job broker for Globus. We admit that WebFlow does not comprise a complete solution yet for the seamless access to remote resources. Many issues, notably security, still remain to be solved. We expect to leverage from the recent DATORR (Desktop Access to Remote Resources) initiative of the Java Grande Forum when tackling these issues. Overv...
We developed a platform independent, three-tier system, called WebFlow. The visual authoring tool... more We developed a platform independent, three-tier system, called WebFlow. The visual authoring tools implemented in the front end integrated with the middle tier network of servers based on CORBA and following distributed object paradigm, facilitate seamless integration of commodity software components. We add high performance to commodity systems using GLOBUS metacomputing toolkit as the backend. Programming tools that are simultaneously sustainable, highly functional, robust and easy to use have been hard to come by in the HPCC arena. This is partially due to the difficulty in developing sophisticated customized systems for what is a relatively small part of the worldwide computing enterprise. Thus we have developed a new strategy- termed HPcc High Performance Commodity Computing [1]- which
Summary We present here an approach towards visual authoring environments for Web/Commodity based... more Summary We present here an approach towards visual authoring environments for Web/Commodity based distributed object/omponentwarecomputing using the WebFlow system under development at NPAC as a case study. WebFlow is a 3-tier Java based visual dataflowsystem with applets based authoring, visualization and control front-ends, and with servlets based middleware management ofbackend modules that wrap legacy codes such as databases or high performance simulations. We summarize here the WebFlowarchitecture, we describe a set of demos and early applications in various areas of distributed computing (including imaging, col-laboration, condensed matter physics and military wargaming simulations), and we outline the next phase design, based on lesson slearned in the current prototype. New WebFlow uses JWORB (Java Web Object Request Broker) middleware and employsWOMA (Web Object Management Architecture) methodology to establish a testbed for testing, evaluating and integrating theemergent com...
This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). T... more This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). The Web-based implementation extends the Watershed Modeling System by adding the capability to download the input data directly from the Internet, and execute the simulation codes on a remote high-performance host. This makes it possible to run LMS anywhere from a networked laptop. Furthermore, our system allows for constructing complex simulations by coupling several independently developed codes into a single, distributed application. The Web-based LMS is implemented as a WebFlow application. WebFlow is a modern three-tier commodity standards-based High Performance Distributed Computing (HPDC) system that integrates a high-level graphical user interface (Tier 1), distributed scalable object broker middleware (Tier 2), and a high-performance back end (Tier 3).
Abstract This paper describes a pilot Web-based implementation of the Landscape Management System... more Abstract This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). The Web-based implementation extends the Watershed Modeling System by adding the capability to download the input data directly from the Internet, and execute the simulation codes on a remote high-performance host. This makes it possible to run LMS anywhere from a networked laptop. Furthermore, our system allows for constructing complex simulations by coupling several independently developed codes ...
Programming tools that are simultaneously sustainable, highly functional, robust and easy to use ... more Programming tools that are simultaneously sustainable, highly functional, robust and easy to use have been hard to come by in the HPCC arena. Thus we have developed a new strategy, HPcc: High Performance Commodity Computing, which builds HPCC programming tools on top of the remarkable new software infrastructure being built for the commercial web and distributed-object areas. This leverage of a huge industry investment naturally delivers tools with the desired properties with the one (albeit critical) exception that high performance is not guaranteed. Our approach automatically gives the user access to the full range of commercial capabilities (e.g., databases and compute servers), pervasive access from all platforms, and natural incremental enhancement as the industry software juggernaut continues to deliver software systems of rapidly increasing power. We add high performance to commodity systems using a multi-tiered architecture with the Globus meta-computing toolkit as the backe...
Programming tools that are simultaneously sustainable, highly functional, robust and easy to use ... more Programming tools that are simultaneously sustainable, highly functional, robust and easy to use have been hard to come by in the HPCC arena. This is partially due to the difficulty in developing sophisticated customized systems for what is a relatively small part of the worldwide computing enterprise. Thus we have developed a new strategytermed HPcc High Performance Commodity Computing[1]-which builds HPCC programming tools on top of the remarkable new software infrastructure being built for the commercial web and distributed object areas. We add high performance to commodity systems using multi tier architecture with GLOBUS metacomputing toolkit as the backend of a middle tier of commodity web and object servers. We have demonstrated the fully functional prototype of WebFlow during Alliance'98 meeting.
Abstract: In this paper we discuss use of WebFlow for a seamless access to remote resources. We i... more Abstract: In this paper we discuss use of WebFlow for a seamless access to remote resources. We illustrate our ideas with two WebFlow applications that require access to remote resources: the Landscape Management System (LMS) and Quantum Simulations (QS). For LMS we use WebFlow to retrieve data from many different sources as well as to allocate remote computational resources needed to solve the problem at hand. WebFlow transparently for the user controls the necessary data transfer between hosts. Quantum ...
Summary We present here an approach towards visual authoring environments for Web/Commodity based... more Summary We present here an approach towards visual authoring environments for Web/Commodity based distributed object/omponentware computing using the WebFlow system under development at NPAC as a case study. WebFlow is a 3-tier Java based visual dataflow system with applets based authoring, visualization and control front-ends, and with servlets based middleware management of backend modules that wrap legacy codes such as databases or high performance simulations. We summarize here the WebFlow ...
A WebFlow Application Technical Report, Apr 1, 1999
This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). T... more This paper describes a pilot Web-based implementation of the Landscape Management System (LMS). The Web-based implementation extends the Watershed Modeling System by adding the capability to download the input data directly from the Internet, and execute the simulation codes on a remote high-performance host. This makes it possible to run LMS anywhere from a networked laptop. Furthermore, our system allows for constructing complex simulations by coupling several independently developed codes ...
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Papers by Erol Akarsu