The proceedings contain 11 papers. The topics discussed include: integrating existing scientific workflow systems: the Kepler/Pegasus example;workflow adaptation as an autonomic computing problem;supporting large-scal...
ISBN:
(纸本)9781595937155
The proceedings contain 11 papers. The topics discussed include: integrating existing scientific workflow systems: the Kepler/Pegasus example;workflow adaptation as an autonomic computing problem;supporting large-scalescience with workflows;on the black art of designing computational workflows;WS-VLAM: towards a scalable workflow system on the grid;a semantic workflow authoring tool for programming grids;a workflow approach to designed reservoir study;myExperiment: social networking for workflow-using e-scientists;GRIDCC: real-time workflow system;and cache for workflows.
The proceedings contain 11 papers. The topics discussed include: myExperiment: social networking for workflow-using e-scientists;GRIDCC: real-time workflow system;cache for workflows;integrating existing scientific wo...
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ISBN:
(纸本)1595937153
The proceedings contain 11 papers. The topics discussed include: myExperiment: social networking for workflow-using e-scientists;GRIDCC: real-time workflow system;cache for workflows;integrating existing scientific workflow systems: the Kepler/Pegasus example;workflow adaptation as an autonomic computing problem;workflow automation for processing plasma fusion simulation data;supporting large-scalescience with workflows;on the black art of designing computational workflows;WS-VLAM: towards a scalable workflow system on the grid;a semantic workflow authoring tool for programming grids;and a workflow approach to designed reservoir study.
largescale scientific applications require extensive support from middleware and frameworks that provide the capabilities for distributed execution in the Grid environment. In particular, one of the examples of such ...
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ISBN:
(纸本)9781595937155
largescale scientific applications require extensive support from middleware and frameworks that provide the capabilities for distributed execution in the Grid environment. In particular, one of the examples of such frameworks is a Grid-enabled workflow management system. In this paper we present WS-VLAM workflow management system, describe its current design and the developments targeting to support efficient and scalable execution of large workflow applications on the Grid. Copyright 2007 ACM.
Current workflow systems support data flow through complex analyses in a distributed environment. The scope of scientific workflow systems could expand to support the entire scientific research cycle, which includes d...
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ISBN:
(纸本)9781595937155
Current workflow systems support data flow through complex analyses in a distributed environment. The scope of scientific workflow systems could expand to support the entire scientific research cycle, which includes data flow, design flow, and knowledge flow tasks. Example tasks and requirements within each of these are explored, illustrated by a use case in environmental science. Nexus points between scientific tasks and potential workflow support mechanisms are identified and described. Several new ideas, or modifications of existing ideas are introduced: science dashboards, meta-provenance, eventdriven workflows, extreme workflow development, and collective thinking workflows. Copyright 2007 ACM.
The performance of long running scientific workflows stands to benefit from adapting to changes in their environment. Autonomic Computing provides methodologies for managing run-time adaptations in managed systems. In...
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ISBN:
(纸本)9781595937155
The performance of long running scientific workflows stands to benefit from adapting to changes in their environment. Autonomic Computing provides methodologies for managing run-time adaptations in managed systems. In this paper, we apply the monitoring, analysis, planning and execution (MAPE) model from autonomic computing to support the runtime modification of workflows with the aim of improving their performance. We systematically identify run-time adaptations and indicate how such behaviours can be captured using the MAPE model from the Autonomic Computing community. By characterising these as autonomic computing problems we make a proposal about how workflow adaptation can be achieved. Copyright 2007 ACM.
This paper discusses the motivation for the design of a decentralised data-caching scheme for Internet scale distributed computing applications. We provide three target scenarios in distributed cycle sharing applicati...
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ISBN:
(纸本)9781595937155
This paper discusses the motivation for the design of a decentralised data-caching scheme for Internet scale distributed computing applications. We provide three target scenarios in distributed cycle sharing applications, music information retrieval workflows and for workflow-based audio visual searching across distributed information servers. We argue that extensions are needed in existing toolkits to advance super peer topologies to support the caching of application data as well as adverts for specific applications. We discuss the Alchemist system that defines super peer style overlays for caching application data by employing the use of dynamic groups which are flexible in defining replicating, forwarding and security policies. This framework is built on top of existing technologies, such as P2PS and WSPeer and exploits standardised Web services technologies as well as SOAP and more recently defined Web services specifications. We present results to indicate the usefulness of such a data caching approach for distributing workflows and application data, and discuss future simulations that aim to sustain the evolution of the system. Copyright 2007 ACM.
Computational workflows have recently emerged as an effective paradigm to manage large-scale distributed scientific computations. Workflow systems can automate many execution-level details and provide assistance in co...
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ISBN:
(纸本)9781595937155
Computational workflows have recently emerged as an effective paradigm to manage large-scale distributed scientific computations. Workflow systems can automate many execution-level details and provide assistance in composing and validating workflows. However, there is still a significant effort involved in creating these workflows since they often represent collaborative and exploratory science experiments. Therefore, current practice is effective in producing results but not cost-effective for widespread adoption. Drawing from our previous research in computational workflows across scientific disciplines, this paper analyzes the tasks and overall process for designing these workflows. We discuss software engineering methodologies and their relevance to creating workflows as a unique kind of software artifact. We also discuss our ongoing work to make workflow applications more cost effective and lower the barriers for widespread adoption of workflow technologies. Copyright 2007 ACM.
The Center for Plasma Edge Simulation project aims to automate simulation monitoring, data processing, and result archival using scientific workflows. We describe these tasks and requirements, and the newly developed ...
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ISBN:
(纸本)9781595937155
The Center for Plasma Edge Simulation project aims to automate simulation monitoring, data processing, and result archival using scientific workflows. We describe these tasks and requirements, and the newly developed Kepler workflow components that provide the required functionality for our automated workflow solution. Besides functionality, the focus is on the robust execution of the workflow. To this end, a user-level checkpointing model has been developed that allows a workflow to restart and re-execute operations that failed during a previous run. Copyright 2007 ACM.
The Grid is a concept which allows the sharing of resources between distributed communities, allowing each to progress towards potentially different goals. As adoption of the Grid increases so are the activities that ...
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ISBN:
(纸本)9781595937155
The Grid is a concept which allows the sharing of resources between distributed communities, allowing each to progress towards potentially different goals. As adoption of the Grid increases so are the activities that people wish to conduct through it. The GRIDCC project is a European Union funded project addressing the issues of integrating instruments into the Grid. This increases the requirement of workflows and Quality of Service upon these workflows as many of these instruments have real-time requirements. In this paper we present the workflow management service within the GRIDCC project which is tasked with optimising the workflows and ensuring that they meet the pre-defined QoS requirements specified upon them. Copyright 2007 ACM.
We present the Taverna workflow workbench and argue that scientific workflow environments need a rich ecosystem of tools that support the scientists' experimental lifecycle. workflows are scientific objects in the...
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ISBN:
(纸本)9781595937155
We present the Taverna workflow workbench and argue that scientific workflow environments need a rich ecosystem of tools that support the scientists' experimental lifecycle. workflows are scientific objects in their own right, to be exchanged and reused. myExperiment is a new initiative to create a social networking environment for workflow workers. We present the motivation for myExperiment and sketch the proposed capabilities and challenges. We argue that actively engaging with a scientist's needs, fears and reward incentives is crucial for success.
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