Transcript A discussion for potential research topics

Information Services
• Configuration, performance, monitoring, … , the
information about the grid entities should be made
available to the users /applications in a timely,
consistent & easy to use manner.
• An understanding of alternative designs of a Grid
information service. (MDS2/LDAP/Directory
services, Relational databases, and MDS3/Grid
services)
MDS2/LDAP/Directory Services
• Hierarchical model.
• Pro: Naturally decomposes across
administrative boundaries.
• Con: cannot reflect complex relationships
among data objects; perform poorly when
frequently updates; lack of powerful query
languages.
Relational models
RGIS
R-GMA
Users
Apps
Web
SOAP
Producer
Authentication
Query Mgr.
Registry
Update Mgr.
Consumer
Oracle 9i
Some notes about relational models
• RGIS:
One server per site.
representing, updating, querying.
• R-GMA:
one “RDBMS” per VO.
It’s relational in the sense of SQL.
Goes to web service.
MDS3 (Grid Services)
• Resource layer: Service data (XML).
Service type (WSDL).
• Collective layer: index, aggregator.
• OGSA framework.