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A PPARC funded project
AG/AVO grid-tech work
Guy Rixon
AstroGrid Consortium meeting
April 2004
WG Activity
Grid-tech report
OGSA-DAI experiments
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Grid Data Warehouse
GridFTP experiments
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Working code
Could be added to MySpace
Certification proposal
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In-house management of PKI
Needs a prototype
GGF involvement
Standards input to IVOA (imminent)
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Asynchronous activities
Security
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OGSA-DAI etc
GDW works…
…for a lenient value of ‘works’.
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Pre-loaded data
Read-only data
Small results sets
OGSA-DAI not yet up to the job
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Off-the-shelf grid services
GridFTP
OGSA-DAI ( maybe)
ELDAS (OGSA-DAI clone)
Urmm…
Nothing else seems both standard and useful.
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DFDL
Data Format Description Language
Map between XMLish structures and binary
tables storage?
Current version based on W3C XML schema
Need help in defining/testing it.
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GGF architecture & plumbing
Open Grid Services Architecture (OGSA):
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Still vapourous; nothing we can use.
Open Grid Services Infrastructure (OGSI):
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Dead as a parrot.
WS-ResourceFramework (WS-RF)
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Replaces OGSI
Subject of OASIS technical committee
Useful to IVO:
 Connect IVO web-services to grid
 Manage asynchronous activities
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Few/no implementations yet
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The squeeze on OGSA
OGSA’s job eroded by IVOA and industry products?
Original plan, c. GGF5
Current reality, c. GGF10
Projection, c. GGF13
Grid Applications
Grid Applications
OGSA
IT Industry standards
OGSA
Grid Applications
O
G
DFDL GridFTP GSI?
S
A
IT Industry standards
IT Industry standards
If so, we get more benefit from GGF standards that assist the
junction of apps and industry
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The way forward
As per the agreement at the Strasbourg IVOA
meeting:
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Do ‘vanilla’ web services (WS-I etc.)
Use grid/GGF/OASIS plumbing with caution
 GridFTP
 Grid-style security
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Hide grids as ‘intragrids’
Plus, in 2004/2005:
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Maybe use WS-RF to serve our own ends
Re-integrate with the GGF grid later
(2005/2006?)
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