OGSA is an open standard for service-oriented grids developed by the Global Grid Forum (now the Open Grid Forum) to allow grids to operate as single virtual systems through standardization. It specifies services for infrastructure, execution management, data, resource management, security, self-management, and information. Implementations include the Globus Toolkit which has been used for commercial data centers, severe storm modeling, online media, and national research collaborations.

1. OGSA Dragos Sb îrlea

2. SUMMARY What is OGSA? Who and Why developed OGSA? What does OGSA offer? What implementations exist?

3. WHAT IS OGSA ? Open Grid Services Infrastructure Service-oriented Architecture (SOA) Based on WebServices D esigned for Grids

4. WHO AND WHY CREATES OGSA? Global Grid Forum (GGF) , now Open Grid Forum IBM, Intel, HP Purpose : Standardisation Usage of best practices in Grid architecture

5. WHO AND WHY CREATES OGSA ? (2) “ Key to the realization of this Grid vision is standardization, so that the diverse components […] can be discovered, accessed, allocated, monitored, accounted for, billed for, etc., and in general managed as a single virtual system—even when provided by different vendors or operated by different organizations.” The Open Grid Services Architecture Specifications

6. WHAT IS SPECIFIED BY OGSA? Infrastructure services Execution Management services Data services Resource Management services Security services Self-management services Information services

7. IMPLEMENTATION Globus Alliance -> Globus Toolkit Usecases: Commercial Data Center Severe Storm Modeling Online Media and Entertainment National Fusion Collaboratory (NFC) Grid Resource Reseller Grid Lite

8. QUESTIONS ?

9. Thank You!