Some Basics of Globus Web Services Adarsh Patil http://www.adarshpatil.com/
GGF-Globus Grid Forum <ul><li>GGF4 was formed on Feb 2002 </li></ul><ul><li>Globus team and IBM proposed first OGSA specif...
OGSI-Open Grid Service Implementation <ul><li>It is an technical specification for the implementation of Grid Services as ...
WSRF-Web Service Resource Framework <ul><li>Globus Alliance + IBM + HP --> introduced WSRF to solve this issue  ( many imp...
Web Services <ul><li>Based on Service Oriented Architecture </li></ul><ul><li>Clients are service Requestors </li></ul><ul...
WSDL-Web Service Description Language <ul><li>It’s a XML based specification </li></ul><ul><li>It is used to describe Web ...
SOAP-Simple Object Access Protocol <ul><li>It’s a communication protocol for clients and servers to exchange messages in X...
UDDI- Universal Description, Discovery, and Integration <ul><li>Service discovery and registration </li></ul><ul><li>Used ...
OGSA- Open Grid Service Architecture <ul><li>Architecture to build service oriented Grid. </li></ul><ul><li>It is based on...
Credits/Acknowledgements <ul><li>http://www.globus.org </li></ul><ul><li>http://www.globusconsortium.com/  </li></ul><ul><...
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Gws adarsh

  1. 1. Some Basics of Globus Web Services Adarsh Patil http://www.adarshpatil.com/
  2. 2. GGF-Globus Grid Forum <ul><li>GGF4 was formed on Feb 2002 </li></ul><ul><li>Globus team and IBM proposed first OGSA specification to merge Globus and Web Services (globus 2.x to globus 3.x) </li></ul><ul><li>This is a body for designing standards for the Grid. </li></ul>
  3. 3. OGSI-Open Grid Service Implementation <ul><li>It is an technical specification for the implementation of Grid Services as described in the OGSA specification </li></ul><ul><li>Globus Toolkit 3 and 4 are OGSA complaint and are Service Oriented Grid Systems </li></ul><ul><li>Grid services are transient and stateful. Due to heavy specifications in one and only OGSI (too many specification in OGSI) it does not fit in web services and xml protocols </li></ul>
  4. 4. WSRF-Web Service Resource Framework <ul><li>Globus Alliance + IBM + HP --> introduced WSRF to solve this issue ( many implementations in specification of OGSI) </li></ul><ul><li>WSRF standard promises this effort </li></ul>
  5. 5. Web Services <ul><li>Based on Service Oriented Architecture </li></ul><ul><li>Clients are service Requestors </li></ul><ul><li>Servers are service Providers </li></ul><ul><li>XML, http, SOAP, WSDL, UDDI, WS-Inspection language are used </li></ul><ul><li>Request, Publish, Registry </li></ul>
  6. 6. WSDL-Web Service Description Language <ul><li>It’s a XML based specification </li></ul><ul><li>It is used to describe Web Service </li></ul><ul><li>It describes </li></ul><ul><ul><li>What a service can do? </li></ul></ul><ul><ul><li>Where is its location? </li></ul></ul><ul><ul><li>How to invoke it ? </li></ul></ul>
  7. 7. SOAP-Simple Object Access Protocol <ul><li>It’s a communication protocol for clients and servers to exchange messages in XML format over http </li></ul><ul><li>It specifies rules, header, body(URI) </li></ul><ul><li>The message contains </li></ul><ul><ul><li>SOAP envelope </li></ul></ul><ul><ul><li>SOAP schema </li></ul></ul><ul><ul><li>XML schema definition </li></ul></ul>
  8. 8. UDDI- Universal Description, Discovery, and Integration <ul><li>Service discovery and registration </li></ul><ul><li>Used to advertise services </li></ul><ul><li>Used to find appropriate services </li></ul><ul><li>Use to publish/obtain services </li></ul><ul><li>Provider, User, Registry - white pages, yellow pages , green pages </li></ul>
  9. 9. OGSA- Open Grid Service Architecture <ul><li>Architecture to build service oriented Grid. </li></ul><ul><li>It is based on web services </li></ul><ul><li>It uses protocols such as xml, http </li></ul><ul><li>Concept of Grid Services was introduced in OGSA </li></ul><ul><li>It defines various aspect of Grid Service and interfaces that are needed. </li></ul><ul><li>OGSA-WG is the work group which works on the design of OGSA specification </li></ul>
  10. 10. Credits/Acknowledgements <ul><li>http://www.globus.org </li></ul><ul><li>http://www.globusconsortium.com/ </li></ul><ul><li>http://www.globusworld.org/ </li></ul><ul><li>http://www.ggf.org/ </li></ul><ul><li>Text Books </li></ul><ul><li>The Grid 2: Blueprint for a New Computing Infrastructure (The Morgan Kaufmann Series in Computer Architecture and Design) </li></ul><ul><li>The Grid : Core Technologies </li></ul><ul><li>Grid Computing: Making The Global Infrastructure a Reality </li></ul>

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