a pparc funded project votech astrogrid dsa update kona andrews institute for astronomy university...
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A PPARC funded projectVOTech AstroGrid DSA
Update
Kona Andrews
Institute for Astronomy University of Edinburgh
05-09-2006 VOTech PM4 DSA UPDATE 2
Kona Andrews
PM3 DSA Plans
Family of DSA components DSA/Catalogue DSA/SIAP DSA/STAP (Time, not Table) DSA/SLAP DSA/SkyNode DSA/Catalogue
DataMining extensions
05-09-2006 VOTech PM4 DSA UPDATE 3
Kona Andrews
DSA/SIAP
AG SIAP services exist, but implemented in Perl
Working on equivalent Java functionality
Standardised DB schema for image metadata to support generic component; image DB creation will probably be site-specific
Contact: Phil Nicolson
05-09-2006 VOTech PM4 DSA UPDATE 4
Kona Andrews
DSA/STAP
Simple Time Access Protocol (cf SIAP, but for start and end times)
Service implemented, working instance(s) sdeployed at MSSL
More work on installation packaging
Contact: Kevin Benson / Silvia Dalla
05-09-2006 VOTech PM4 DSA UPDATE 5
Kona Andrews
DSA/SLAP
Client functionality exists in AstroScope for finding spectra in pre-existing services
AG server-side component still to be developed
Can hopefully harness functionality and packaging from STAP
Contact: Keith Noddle
05-09-2006 VOTech PM4 DSA UPDATE 6
Kona Andrews
DSA/SkyNode
SkyNode and ADQL undergoing a period of significant revision
Have SkyNode client functionality in AG workbench
Will not implement server-side functionality until new SkyNode proposal stabilises
Contact: Kona Andrews
05-09-2006 VOTech PM4 DSA UPDATE 7
Kona Andrews
DSA/Catalog: Query model
Now supporting schema-compliant ADQL 0.7.4 -1.0, with validation (and schema bugfixes)
Model based on XMLBeans – “no maintenance”, good handles for manipulating queries
Region present in beans but presently disabled
Committed to XML as an implementation technology
05-09-2006 VOTech PM4 DSA UPDATE 8
Kona Andrews
DSA/Catalog: DBMS support
Built-in XSLT sheets (based on Aurélien’s original) supplied for: MySQL PostgreSQL Microsoft SQLServer HSQLDB
Easy to configure installation to use different XSLT, and to share XSLTs
Would like to test against other JDBC-compliant RDBMSs (Oracle, Sybase etc)
05-09-2006 VOTech PM4 DSA UPDATE 9
Kona Andrews
DSA/Catalog: Auth/Auth
Prototype DSA with digital signature checking available
Problems with Axis causing authentication issues
Contact: Guy Rixon
05-09-2006 VOTech PM4 DSA UPDATE 10
Kona Andrews
DSA/Catalog: Enhancements
Continual improvements to scalability and stability
Continual improvements to user interface, error reporting and installation documentation
Continual streamlining of software architecture, implementation and packaging
Core focus: Producing a robust, generic asynchronous querying engine, with a parallel effort to be responsive to user requests
05-09-2006 VOTech PM4 DSA UPDATE 11
Kona Andrews
Datamining extensions
Working collaboratively with the OGSA-DAI project, with emphasis on : 1. Ingestion of VOTable into RDBMS 2. Migration of tabular data between RDBMSs 3. Distributed queries
Large query result support (millions of rows)
Further work in DS6, M.Sc. student projects
05-09-2006 VOTech PM4 DSA UPDATE 12
Kona Andrews
DSA/Catalog: Interesting times
Major changes coming for ADQL? (including no XML standard?)
Major changes coming for SkyNode?
Lots of questions re coordinate systems etc
Again, focus on producing a robust, generic asynchronous query engine, and add interfaces / querying standards as they emerge
05-09-2006 VOTech PM4 DSA UPDATE 13
Kona Andrews
Contact details
Kona Andrews: [email protected]
Keith Noddle: [email protected]
Components: http://software.astrogrid.org