OGSI'NET Hosting Environment

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OGSI.NET Hosting Environment
Glenn Wasson and Marty Humphrey Grid Computing
Group University of Virginia
GT3 Developers Administrators Workshop
GlobusWorld, Jan 16-17, 2003
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What is a hosting environment?

• Dispatch framework
• Execution container (sandbox)
• Marshalling engine
• Term definitions
• Framework, container, engine

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UVAs History with OGSI TPs

• Early, eager proponents of OGSA
• Developed GSI support for TP3 clients
• Used TP4 and .NET in CHARMM demo at SC2002 NPACI
  booth

4
Protein Folding on the Grid
Job Manager Web Service
Unix
.NET
Username / password
https
Input / output URIs
Based on OGSI TP 4
Asynch. message delivery
DAG URI, Sink URI
Poll request
Start job, send URIs
Status updates
Retrieve credentials
Retrieve DAG file
GridFTP
DAG file
Input files
GridFTP
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GSS vs. GT3 vs. Axis

• There is a working code artifact (TP5)
• Influences on shape of that artifact
• The Grid Service Specification
• The marshalling/dispatch environment
• Axis Apache Tomcat JAX-RPC
• Tech Preview design decisions
• Inter-op and validation

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OGSI .NET Service Hosting Issues

• Dispatch
• HttpHandlers
• HttpModules
• WSE filter pipeline

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OGSI .NET Service Hosting Issues

• Dynamic Service Creation
• Persistent services with ASP.NET web services
• Modify the file system
• Actually just virtual directories
• .NET Remoting
• These objects dont even need IIS

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OGSI .NET Service Hosting Issues

• Inter-operability with other OGSI environments
• If you think XML guarantees inter-op.
• TP5s java and .NET FindServiceData clients can
  successfully process different XML returned
  from queried service
• Relates back to understanding spec vs.
  implementation differences

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OGSI .NET Service Hosting Issues

• Validation
• How do you know if your hosting environment is
  compliant?
• Is there a validation test suite?
• Test directories in TP5?

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Demo

• Use TP5s java FindServiceDataByName client
• Retrieve CurrentTime service data element
• First from java service
• Then from .NET hosted service

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Future Directions

• Remoting
• Grid Service class improvements
• Integration of WSE features
• Facilitate/Integrate .NET hosting developments
  from other groups
• e.g. Pierluigi Ritrovato, University of Salerno