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Daniel Zinn Bertram Ludäscher University of California at Davis Presented at IPAW 2010

Abstract Provenance Graphs: Anticipating and Exploiting Schema-Level Data Provenance. Daniel Zinn Bertram Ludäscher University of California at Davis Presented at IPAW 2010. Motivation. Phylogenetic Tree of Primates. Scientific Workflows. Newick Tree. Aligned AA-Sequences.

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Daniel Zinn Bertram Ludäscher University of California at Davis Presented at IPAW 2010

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  1. Abstract Provenance Graphs: Anticipating and Exploiting Schema-Level Data Provenance Daniel Zinn Bertram Ludäscher University of California at Davis Presented at IPAW 2010

  2. Motivation Phylogenetic Tree of Primates

  3. Scientific Workflows Newick Tree Aligned AA-Sequences AA-Sequences Clustal DrawTree Quicktree Actors Tokens int, string, record{..}, array[..], .. Ports Channels SciWF = Executable specification of Scientific Method

  4. Virtual Data Assembly Lines (COMAD in Kepler) Data is organized as XML-like tree structures Encapsulate actor within a configurableshell XML XML XML XML Three configuration parameters: Scopeσ – to select scope of actor invocation Input assemblerγ – to create inputs for wrapped component Write expressionω – to write results back into data stream

  5. Workflow execution and Provenance

  6. Ex1: Phylogenetics Workflow Configurations Workflow Graph APG

  7. Ex2: BUG! Idle Actor – No Input No input Configurations Workflow Graph APG No input

  8. Ex3: Bug! Wrong input Configurations Workflow Graph APG

  9. Bigger Picture

  10. Types and such

  11. In the paper…

  12. APGs for the Three Examples • Ex1: Desired result Ex2: Bug - No input Ex3: Bug - Too much input

  13. Time-Collapsed Flowgraph • Only Show Collection-Structure at the End Collapse Provenance

  14. Structure-Collapsed Flowgraph • Collapse the Collection edges

  15. Summary • Abstract Provenance Graphs • … summarize potential Provenance graphs via graph homomorphisms • … are constructed via static analysis of the workflow without running the WF • … explain workflow’s data-flow • … make it easier to spot certain configuration bugs

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