The OGSA Vision for Service Oriented Architectures Dave Berry Research Manager, NeSC Co-chair, GGF OGSA Data WG European Grid Technology Days 2005 Concertation Meeting, June 1 st 2005

Overview What is OGSA? Web Service specifications The OGSA roadmap

OGSA: Open Grid Services Architecture Open service-oriented architecture Based on Web Services, addressing Grid scenarios Resources as First Class Entities Dynamic service/resource creation and destruction Component Based Elements of the Architecture are pluggable Customizable Support for dynamic, domain-specific content,... Within the same standardized framework GGF ’ s flagship architecture and the blueprint for industry standard grid computing

OGSA Contributors Industry (Fujitsu, IBM, HP, NEC, Hitachi, Platform, Univa, …) Academia (UK e-Science, CERN, Argonne, ISI, …) Continuing in this spirit of collaboration, many of the following slides are the work of other people Hiro Kishimoto, Ian Foster, Dave Snelling,…

Why Web Services? Interoperability is key When crossing organisational boundaries Globus, GLite, OMII, ChinaGrid, …? Web Services provide a common infrastructure And industry support Distributed and heterogeneous environment Much work left to do Existing specifications provide a foundation

Context Services Info Services Infra Services Security Services Rsrc Mgmt Services Execution Mgmt Services Data Services Policy Mgmt VO Mgmt Access Integration Transfer Replication Boundary Traversal Integrity Authorization Authentication WSRFWSNWSDM Event Mgmt MonitoringDiscovery Job Mgmt Logging Execution Planning Workflow Mgmt Workload Mgmt Provisioning Execution DeploymentConfigurationReservation Naming Self Mgmt Services Heterogeneity Mgmt Service Level Attainment QoS Mgmt Optimization Information Services Infrastructure Services Self Mgmt Services Security Services Resource Mgmt Services Execution Mgmt Services Data Services Context Services

Relevant Specifications SYSTEMS MANAGEMENT UTILITY COMPUTING GRID COMPUTING Core Services Base Profile WS-Addressing Privacy WS-Base Notification CIM/JSIM WSRF-RAP WSDM WS-Security Naming OGSA-EMSByteIO GFD-C.16 GGF-UR Data Model HTTP(S)/SOAP GRID Computing, Distributed Computing and Utility Computing are different views of the same important problem domain. Discovery SAML/XACML WSDL WSRF-RL Trust WS-DAI VO Management Information Distributed query processing ASP Data Centre Use Cases & Applications CollaborationMulti MediaPersistent Archive Data Transport WSRF-RP X.509

A Perspective on SOA Specifications From OGSA Status and Future, Hiro Kishimoto and Ian Foster, GGF12 slide originally from Michael Behrens, DISA consultant

Of particular relevance to OGSA … W3C WS-Addressing OASIS WSRF and WS-Notification WS-Security, etc. WSDM DMTF Utility Computing CIM Server management

W3C is an international consortium where Member organizations, a full-time staff, and the public work together to develop Web standards. Founded in 1994, ~80 published recommendations, staff on 3 continents Members of W3C range from l eading technology companies to non-profit organisations and individuals. Best known for fundamental web standards, including: XML XML Schema XHTML XSL/XSLT MathML SSML CCS OWL Several working groups are relevant to grid standards projects including: WS- Addressing WSDL 2.0 Binary data W3C: World-Wide Web Consortium

DMTF is an industry organization leading the development of management standards and integration technology. Founded in 1992 Best known for standards that address system management in enterprise and Internet environments, including: CIM WBEM DMI Several working groups are relevant to grid standards projects including: CIM Core Utility Computing Server Management DMTF: Distributed Management Task Force

OASIS is a member-led, international nonprofit standards consortium concentrating on structured information and global e-business standards Founded in 1993, ~65 projects, staff on 3 continents Members of OASIS are Vendors, users, academics and governments Organizations, individuals and industry groups Best known for e-business standards that address real world business requirements, including UDDI SAML ebXML WS-Security WSRP WS-Reliability SPML XACML UBL Host for key grid standards projects including WSDM WSRF WS-N OASIS: Organization for the Advancement of Structured Information Standards

OGSA Working Group History Announced at GGF4 (2/02) WG created (9/02) Declared as GGF ’ s flagship architecture at GGF10 (3/04) OGSA roadmap draft at GGF12 (9/04) OGSA Usecase document publication (11/04) OGSA document v1 and glossary publication (3/05) OGSA roadmap submitted to GGF14 (6/05) 2+ regular weekly teleconferences > 300 mailing list subscribers

OGSA document structure Roadmap document Concepts and Fundamentals Usecase document Scenario Service Description Profile Actual specs consistent inform and guide inform and guide feedback refer Proposed recomendation informational All specs produced by other GGF WGs or other SDOs Root documents Documents produced by OGSA WG or other GGF WGs

E.g. OGSA Data working group Brings together: Domain experts within OGSA Chairs of other WG/RGs Output is included in OGSA specification OGSA-WG OGSA Data working group DAIS-WG GSM-WG GFS-WG ByteIO WG Tele cons, F2F meetings OGSA WG Design Teams do the same for Execution Services, Information Services, Security, …

Forthcoming Specifications JSDL: Job Submission Description Language OGSA BES: Basic Execution Service ByteIO: POSIX-like IO WS-DAI: Data Access and Integration RNS: Resource Namespace Service WS-Naming: Abstract Names

OGSA Basic Profile v1.0 OGSA needs a stable Web Services infrastructure… …but it is a design objective that OGSA be infrastructure agnostic Hence WSRF basic profile for OGSA There could be other basic profiles for OGSA Normative reference specifications WS-I Basic profile 1.1 & Basic security profile 1.0 WS-addressing WS Resource Framework & WS Notification WS-security

OGSA schedule Base document Scenarios & service descriptions Recommended Profile Normative specifications OGSA-WG Architecture V1.0 OGSA-WG V1.5 OGSA-data Data architecture OGSA-ByteIO ByteIO Usecase OGSA-WG WSRF Basic Profile OGSA-ByteIO OGSA-BES ByteIO Basic Execution Service GFS RNS Left edge: public comment start, Right edge: GFD publication JSDL WS-DAI

OGSA-based Open Source Grids OGSA-DAI Several Grid projects are implementing OGSA components