1. Data Services (sample)

2. OGSA cross WG discussion template2 Outline Requirements Key concepts/functionality Architecture/Model (if any) Services/portTypes (if any) Relation with invited groups

3. OGSA cross WG discussion template3 Requirements Need variety of interfaces … Address need for various transparencies, … Take into account wide variety of data types, … Different applications require different forms of support –… Support wide variety of potential data management interfaces –E.g., data caching, …

4. OGSA cross WG discussion template4 Key concepts Service-oriented treatment of data –Data treated in the same way as other resources Grid Service Handles as global names Manage the lifetime … Represent agreements concerning data access … Integrate data into registries and coordinate operations on data using service orchestration mechanisms. … Data virtualizations –Represented by, and encapsulated in, a data service –SDEs that describe key parameters –Operations to inspect, access data, derive new data virtualizations…, …

5. OGSA cross WG discussion template5 Architecture/Model

6. OGSA cross WG discussion template6 Proposed Services/portTypes (1) Four base data interfaces (WSDL portTypes) –DataDescription …. –DataAccess … –DataFactory … –DataManagement …. A data service is any OGSI-compliant WS that…

7. OGSA cross WG discussion template7 Proposed Services/portTypes (2) Higher-level data interfaces defined on top of base data interfaces: –Data access and movement. –Data replication and caching. –Data and schema mediation. –Metadata management and looking. Basic data access interfaces allow clients direct access … to different data types –e.g., files, directories, file systems, … –A “file access” service may …. –GridFTP, an existing data access service, provides …

8. OGSA cross WG discussion template8 Relation with invited groups Base data interfaces: DAIS,… Higher level interfaces: OREP, PA-RG, GFS-WG,…