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Research 15: Semantic Metadata Generation for Large Scientific Workflows
Published on Feb 25, 20073174 Views
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Chapter list
Semantic Metadata Generation for Large Scientific Workflows 00:08
Outline00:28
Large scale workflows have a lot of parallelism01:09
Managing Creation of Large-Scale Scientific Workflows01:51
Wings/Pegasus Framework: Creation of Large-Scale Grid Workflows [Gil, Kim, Ratnakar, Deelman, OWLED-2006]02:56
Workflow Template (Seismic Hazard Analysis): No Data or Execution Information04:35
Workflow Instance (Workflow)06:26
Creation of Large-Scale Scientific Workflows: Challenges07:24
Metadata of Scientific Workflows 09:18
Our Approach10:45
Workflow Creation 12:03
Metadata Reasoning for Workflow Creation12:38
Generating Metadata while Creating a Large Workflow Instance12:52
Workflow Ontology13:32
Main Types of Metadata Constraints (in OWL ontology)14:57
Constraints on Files16:58
Constraints on Nested Collections18:01
Constraints on Nested Collections (cont)19:23
Component level constraints on metadata attributes of input/output files or collections19:37
Component level constraints (cont)20:19
Template level (global) constraints on metadata attributes of files or collections20:35
Interleaving Execution with Workflow Creation20:48
Executing sub-workflows for full workflow creation21:03
Bind&ValidateWorkflow (WorkflowTemplate wt, InputLinks ILinks) 1. Assign ILinks to LinksToProcess. 2. While LinksToProcess is not empty 2.2. Remove one from LinksToProcess and assign it t21:08
Generating Metadata while Creating a Large Workflow Instance22:05
Scale of Workflow Creation 22:12
Related Work23:17
Conclusions23:51