Simon LawsIBM UK Hursley LaboratoryHursley Services and Technology

OGSA: The Platform for UK e-Science

OGSA In UK eScience Unification

• What is a service?• There is a line between specs that must be the

standards (WSDL?) and specs where there is bound to be variety (BPEL4WS / WS-C)

Patterns• High level things (Registries / Service Domains)• Lower level things (State vs Context / Big “F” and little

“f” factories / Policy and agreement)• Models (Resource / Agreement)

Adoption• What is the roadmap (Non OGSA / OGSA today / OGSA

tomorrow)

Patterns

Policy

Consumer 1 Application Service Provider 1

Appl. Service 1

(invoke)

Agreement Provider 1

(negotiate)

(monitor)

Initiator 1Agreement AgreementFactory

Agreement 1

S.T. R.A.

Agreement 2

S.T. R.A.

(bind

s)

Diagram from OGSI-Agreement Presentation to GRAAP-WG GGF8

Unification

Web Services

Business integration

Secure and universal access

Applications on demand

Grid Protocols

Vast resourcescalability

Global Accessibility

Resourceson demand

ContinuousAvailability

access manageshare

Open Grid Services Architecture

Web Services & Grid Protocols

Adoption (Roadmap)

1. Intra-Grids

2. Extra-Grids

3. Inter-Grids

GridGrid

NAS/SANNAS/SAN

Grid

NAS/SAN

VPN

Cactus

NTG

(SF) Express Project

MFG

Fin.Services

A Function of Business Need, Technology and Organizational Flexibility