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1 Open Grid s Architecture (OGSA) Web services for Grid Computing Steve Graham IBM Software Group, Emerging Technologies Definition - OGSA Open Grid s Architecture (OGSA) A service-oriented architecture for the Grid Model of a computing system as a set of distributed computing patterns realized as applications/extensions of Web services Integrated with existing platforms Based on open standards Extend and apply Web services Standardize within the Global Grid Forum The fundamental basis for the next generation of Grid middleware Grid application interface Web services 2 1

2 How did we arrive at Web s? http Web GET/POST s 3 Application Humans provide Integration adaptability over a network using Internet Technologies html Web (web s pages) Oriented Architecture (SOA) 4 Registry Find Publish Requestor Bind Provider 2

3 Web services: Application Integration 5 An architectural approach -Oriented Architecture Make everything a Web service Publish, Find, Bind A collection of open internet-influenced standards XML, SOAP, WSDL, UDDI, WS-Security, WS-Transaction, WS-Coordination, BPEL4WS, etc. A focus on interoperability Between platforms, programming languages, etc. A collection of tooling and runtimes Open source and/or vendor supported Web s Properties 6 Loose-coupling Dynamic discovery of and binding to collaborators Programming-language-neutral Platform-neutral Built on existing Internet technologies XML HTTP, FTP, SMTP, etc. Focus on the Interface Minimal shared understanding between service requestor and service provider 3

4 Web services integration: Wrappering 7 Legacy Client Hard-wired invocation Adapter Requestor Bind Bind Web Runtime Legacy Application Find Descrip tion (WSDL) Registry Publish Description (WSDL) Web s Stacks 8 Context Transactions Messaging Extn n Security SOAP SLA SLA Process Flow Flow QoS QoS WSDL XML Schema Directory Inspection Protocols Descriptions Discovery 4

5 A good Web services book 9 Here is an amazon url: obidos/asin/ ISBN: Architecture Framework OGSA Structure 10 Applications System Management System Management s s Autonomic Capabilities Security OGSI Open Grid s Infrastructure Web s Workflow Web s General Database Middleware File Systems Other Grid Grid Other s Grid s Directory Messaging Professional s Servers Storage Network 5

6 Architecture Framework OGSA Structure OGSI Base set of distributed computing patterns Factory, registry, collection 11 Exploits System Management existing Web s services properties Other Grid s Interface abstraction (WSDL) Protocol, language, OGSI hosting Open platform Grid s independence Infrastructure Enhancement Discovery to Lifecycle Web services Registry Management State Management Event Notification Referenceable Handles Lifecycle Management Data Extension Web s Factory Notification HandleMap Architecture Framework OGSA Structure Open Hosting 12 System Management s Other Grid s Discovery OGSI Open Grid s Infrastructure Lifecycle Registry Management Other Hosting Possible platform Hosting Factory Notification HandleMap Platforms (Java) (environments) Web s Python Globus (C/C++) Microsoft (C#) 6

7 Architecture Framework OGSA Structure Software Evolution 13 System Management s Cluster Resource Policy Problem Management Logging Management Determination Provisioning Other Grid s Data Replication File Transfer Job Scheduling Collections OGSI Open Grid s Infrastructure w ww.globus.org Globus Toolkit 3 the globus project tm Discovery Lifecycle Registry Management Factory Notification HandleMap Web s Open Grid Infrastructure (OGSI) Anatomy of a Grid 14 Data Access Lifetime Management Grid (required) Other Interfaces (Optional) creation (Factory) collections Notification Handle Management Handle Element Element Element Data Grid Implementation Other functions e.g. Quality of Level Agreements Resource Management Hosting Environment 7

8 Open Grid Infrastructure (OGSI) Grid Implementation Independence 15 Abstract service interface remains the same Implementation Hosting Environment Other Middleware Operating System Hardware Open Grid Infrastructure (OGSI) Grid Implementation - Examples 16 Abstract service interface remains the same Registry Implementation Hosting Environment - J2EE JNDI JDBC Other Middleware LDAP Database (DB2) Operating System Hardware 8

9 Architecture Framework OGSA Software Evolution 17 Applications Autonomic Capabilities Restructured ISV Software Existing ISV Software OGSI Open Grid s Infrastructure Web s General Middleware Professional s Servers Storage Network Architecture Framework OGSA Software Evolution 18 System Management s Other Grid s Restructured ISV Software OGSI Open Grid s Infrastructure Web s 9

10 Architecture Framework OGSA Software Evolution 19 System Management s Other Grid s OGSI Open Grid s Infrastructure Web s Architecture Framework Products and s for Grids 20 Autonomic Capabilities System Management Sevices Security Workflow Database File Systems Grid s the globus project tm OGSI Open Grid OGSA s w w w.globus.org Infrastructure Directory Messaging IBM Global s 10

11 Distributed Computing 21 First We linked all the machines together Internet, TCP/IP Second We linked all the documents together WWW, HTTP, HTML, XML Third We linked all the applications together Web services: SOAP, WSDL, UDDI, etc. Now We are linking everything else together Grid: OGSA Future Deployment 22 When the network is as fast as the computer's internal links, the machine disintegrates across the net into a set of special purpose appliances - (George Gilder) 11

12 Questions? 23 12

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