1. © 2007Open Grid Forum OGF22, 25th February 2008 OGSA Data Architecture Mario Antonioletti

2. © 2007 Open Grid Forum 2 OGF IPR Policies Apply I acknowledge that participation in this meeting is subject to the OGF Intellectual Property Policy. Intellectual Property Notices Note Well: All statements related to the activities of the OGF and addressed to the OGF are subject to all provisions of Appendix B of GFD-C.1, which grants to the OGF and its participants certain licenses and rights in such statements. Such statements include verbal statements in OGF meetings, as well as written and electronic communications made at any time or place, which are addressed to: the OGF plenary session, any OGF working group or portion thereof, the OGF Board of Directors, the GFSG, or any member thereof on behalf of the OGF, the ADCOM, or any member thereof on behalf of the ADCOM, any OGF mailing list, including any group list, or any other list functioning under OGF auspices, the OGF Editor or the document authoring and review process Statements made outside of a OGF meeting, mailing list or other function, that are clearly not intended to be input to an OGF activity, group or function, are not subject to these provisions. Excerpt from Appendix B of GFD-C.1: Where the OGF knows of rights, or claimed rights, the OGF secretariat shall attempt to obtain from the claimant of such rights, a written assurance that upon approval by the GFSG of the relevant OGF document(s), any party will be able to obtain the right to implement, use and distribute the technology or works when implementing, using or distributing technology based upon the specific specification(s) under openly specified, reasonable, non- discriminatory terms. The working group or research group proposing the use of the technology with respect to which the proprietary rights are claimed may assist the OGF secretariat in this effort. The results of this procedure shall not affect advancement of document, except that the GFSG may defer approval where a delay may facilitate the obtaining of such assurances. The results will, however, be recorded by the OGF Secretariat, and made available. The GFSG may also direct that a summary of the results be included in any GFD published containing the specification. OGF Intellectual Property Policies are adapted from the IETF Intellectual Property Policies that support the Internet Standards Process.

3. © 2007 Open Grid Forum 3 Contents Background Brief Overview Current Status Issues, Future Work, Impacts Where to Next?

4. © 2007 Open Grid Forum Background Group established in September 2005 Aim: Substantiate how data is handled in OGSA Means: Informational document Achieved: Published OGSA-Data Architecture GFD.121, 7 th December 2007 http://www.ogf.org/documents/GFD.121.pdf 4

5. © 2007 Open Grid Forum 5 Overview: OGSA Data Scope Places a stake in the ground Covers: Files and databases (& storage) No stream management, session management, … Identify services and interfaces: Storage, Access, Transfer Replication, Caching, Federation, Metadata catalogues Cross-cutting themes: Security, Policies, … Part of/Consistent with the bigger OGSA picture: E.g. Naming, Workflow, Transactions, Scheduling, Provisioning, …

6. © 2007 Open Grid Forum 6 Overview: Architecture Document Services Data Transfer Data Access Storage Resource Management Data Cache Data Replication Data Federation Metadata Catalogues Appendices Specifications referenced Mappings to specifications DAIS ByteIO SRM DMI … Glossary

7. © 2007 Open Grid Forum 7 Sink/ Source Overview: Basic Structure Access Description Access Description Storage Managed Storage Stored Data Resources Other Data Resources Service interface Resource interface Client APIs (non-OGSA) / Other services Data Service Storage Management

8. © 2007 Open Grid Forum 8 Sink/ Source Transfer Overview: Transfer and Replication Access Sink/ Source Description Access Description ReplicationTransfer Data Resources Service interface Resource interface Transfer Protocols Client APIs (non-OGSA) / Other services Data Service Replication

9. © 2007 Open Grid Forum 9 Sink/ Source Access Overview: Composite Entities Sink/ Source Description Service interface Resource interface Data Service Access Sink/ Source Description Federation Sink/ Source Access Description Cache

10. © 2007 Open Grid Forum 10 Status: Two Informational Documents OGSA Data Architecture 79 pages Describes services and their interfaces OGSA Data Scenarios 50+ pages Explores service compositions to address scenarios (exercise the architecture) Stalled (since OGF19) Some scenarios still need work Integration with execution management services

11. © 2007 Open Grid Forum Status: Where are we? Group has completed its charter Would be nice to complete Scenarios doc Identified gaps that need resolving: Memo to data area chairs Top of the doc root of OGSA-D-WG in Grid Forge https://forge.gridforum.org/sf/go/doc15052?nav=1 11

12. © 2007 Open Grid Forum Issues: Architectural Gaps Standardized tokens with fixed semantics Identify query languages, data formats, transport protocols, … Needed in DAIS, DMI, ByteIO, … Data catalogs & Registries Discovery an important part of Grids Replication/Cache Services/Federation Need to be standardized 12

13. © 2007 Open Grid Forum Future: for the next spec version? Sessions Understanding how these impact the data architecture Streams Architecture only deals with stored data What needs to change to encompass streams? Notification Need to be incorporated into the architecture 13

14. © 2007 Open Grid Forum Future: More … Provisioning Architecture deals with existing data How are new data sources added/removed? Workflow What is the impact of these on the data architecture? 14

15. © 2007 Open Grid Forum Architectural Impacts Adoption of Uniform Naming Scheme OGSA Naming doing this WS-Naming and Resource Namespace Service (RNS) OGF GFS Defined RNS for human readable and hierarchical names Need to take this into account in the Architecture Not universally adopted WS-DAI & SRM do not use the scheme Need to find out if there are issues 15

16. © 2007 Open Grid Forum Architectural Impacts: More … OGF Info-D Information dissemination and eventing Not taken into account in the current architecture document OGF DFDL Describe data formats Impact on the Data Architecture Storage Network Industry Association (SNIA) Standards in the area of networked storage Generally low level but moving to higher levels Need to collaborate for consistency 16

17. © 2007 Open Grid Forum Even More … !! Policies and Agreements Necessary for : Specifying policies Negotiating agreements Evolve Architecture when these are better defined Security !!! Privacy Increasingly becoming a requirement for data Grid Interoperation Now! (GIN) Need feedback about the Architecture Evolve accordingly 17

18. © 2007 Open Grid Forum Where to next: How? Step 1: need new chairs. Current chairs resigned (too busy): Dave Berry, NeSC Allen Luniewski, IBM Step 2: establish a new work plan. Could: Resolve currently identified issues Finish the Scenarios document Produce a new iteration of the Architecture Take the group in new directions 18

19. © 2007 Open Grid Forum If not … Group: Closes/Disbands Hibernates Would be nice to carry on the work NEED NEW BLOOD Will require re-chartering Questions/Discussion … 19

20. © 2007 Open Grid Forum 20 Full Copyright Notice Copyright (C) Open Grid Forum 2008. All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. The limited permissions granted above are perpetual and will not be revoked by the OGF or its successors or assignees.