Paul%20Groth,%20Simon%20Miles,%20Luc%20Moreau - PowerPoint PPT Presentation
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Paul%20Groth,%20Simon%20Miles,%20Luc%20Moreau
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SOA based model of process. Actors communicate via message passing ... deployment consistency. ease of development. Workflow is executed on one machine ... – PowerPoint PPT presentation
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Title: Paul%20Groth,%20Simon%20Miles,%20Luc%20Moreau
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Paul Groth, Simon Miles, Luc Moreau
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Outline
- Process Documentation for Provenance
- Power of the P-Structure
- P-assertion Recording Protocol
- PReServs Functionality
- Performance
- Pitch ?
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Provenance
- The Provenance Question
- Lots of definitions
- Boil it down to a question.
- What is the process that led to a particular
result? - How do we answer this question?
- Search through documentation.
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Documentation
- Process Documentation
- encompasses all other documentation
- SOA based model of process
- Actors communicate via message passing
- Actors make ASSERTIONS to document process.
Termed p-assertions. - How to organise these p-assertions
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P-Structure
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P-Structure View
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Benefits
- Domain independent queries
- That are provenance specific
- P-structure is a shared logical organisation of
p-assertions - Does not prescribe how p-assertions are exactly
stored in an implementation.
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PReP
- Introduces the Provenance Store
- A Separate entity for maintaining process
documentation - PReP specifies how an actor can communicate with
the Provenance Store. - PReP has a number of nice properties.
- Statelessness
- Idempotence
- Terminiation
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An Implementation
- What is PReServ?
- A Web Services implementation of a Provenance
Store - Implements
- PReP for recording
- XQuery for querying
- Provides libraries and wrappers for making
applications provenance aware.
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PReServ Implementation Diagram
Provenance Store
WS Calls
Java Calls
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Implementation cont.
- Caching mechanism to improve performance
- Berkeley Java Database 2.0
- No setup required
- Completely Transactional
SOAP Msg
SOAP Msg
Dispatcher
Store Plug In
Query Plug In
Backend Store Interface
Java Object Database
Memory
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Requirements
- Apache Tomcat 5.0
- Apache Ant 1.6.2
- Java 1.5 (1.4 supported with some help)
- Pure Java, tested on
- Windows
- Mac OS X
- Debian Linux
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Evaluation Deployment
- Protein Compressibility Experiment
- HPDC05
- Workflow runs under VMWare
- deployment consistency
- ease of development
- Workflow is executed on one machine
- PReServ runs on another machine
- Version 0.1.5 of PReServ
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Record Performance
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Query Performance
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Applications
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Conclusion
- The p-structure allows for domain independent,
provenance specific queries using XQuery. - Both recording and query times are linear
- PReServ has a extensible architecture allowing
for further functionality to be easily added.
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Download!
- Try it out!
- Download PReServ 0.2
- The AHM release ?
- Released under Open Source MIT License
- www.pasoa.org
- Click software
- Contact us, we will try to help you make your
application provenance-aware.
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Configuration
- Redhat Linux 9.1 on VMWare on Windows XP
- Pentium P4 2.8 GHZ 1.5 GB RAM
- PReServ on another machine
- Database backend Berkley JDB
- 100 Mb local ethernet
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