Holding slide prior to starting show

1. Holding slide prior to starting show

2. A Portlet Service Model for GECEM Maria Lin and David Walker Cardiff University

3. Project Collaborators • Cardiff University • Swansea University • BAE Systems • HP • Singapore Institute of HPC

4. Outline • Project Overview • Design • Screenshot • Future Work • Conclusion

5. Project Objective • Integration of mesh generation, large-scale linear system solver, and collaborative visualization within a Web service framework. • Problem domain is computational electromagnetics

6. UWS BAE SYSTEMS Geometry data Create geometry Generate mesh Other locations Output Mesh Output Output WeSC CEM simulation GECEM Prototype Grid

7. UWS BAE SYSTEMS Geometry data Create geometry Generate mesh Output Mesh Output Output Singapore CEM simulation GECEM Production Grid Other locations

8. Design • Use portal and portlets to provide end-user interfaces for using grid services • Use Globus Reliable File Transfer (RTF) Service • Use Globus Job Submission Service • Use MyProxy as a single user log-on

9. GECEM Portal • GridSphere • Grid Portlets • GECEM Portlets

10. GridSphere vs Jetspeed • http://www.gridsphere.org/gridsphere/gridsphere?cid=comparison

11. GridSphere • Provide login service • Different role base • Different user • Provide Portlet subscription • Provide layout selection • Allow third-party portlet

12. GridSphere • Based on IBM Websphere • Open source • Developed by people from GridLab • Based on MVC model • Compliant with JSR 168 • Use ActionPortlet Model : tags, beans and events

13. Grid Portlets • Registry Resource • Implement authentication and certification management through myproxy • Provide Job Submission Service • Reliable File Transfer Portlet

14. Registry Resource • Hand-written XML registry • Define Hardware resources • Define Service resources • For myproxy-server

15. Specifying resource <hardware-resource label=“Gecem Myproxy machine” description=“Myproxy resource” hostname=“myproxy.grid-support.ac.uk” <credential-repository label=Gecem Myproxy machine” port=“7512” certfile=“” keyfile=“” proxyfile=“/tmp/proxy.pem”/> </hardware-resource>

16. MyProxy • Store Credential in a MyProxy Server • Configure GridPortlets to apply single logon using myproxy credential • Retrieve credential using myproxy password • Next time logon using myproxy password

17. GECEM Portlets • Select Resources/Machines • Select Files • Submit Job to run meshes and solvers simulation

18. Select Files Data Meshers Solvers Code Swansea Geometry Files BAES Code Swansea

19. Job Submission • View input files • Use Gridportlets for myproxy authentication, Reliable File Transfer and Job Submission • Run script to automate execution of file transfer and job submission • Use Gnuplot to visualize output

20. Current Version • Use Gridsphere 1.1.2 as the portlet-based portal • Use Gridportlets for myproxy authentication, Credential Management and Retrieval • Data Portlets to select files • Job Submission Portlet • transfer file using GT3 Reliable File Transfer (RFT) Service • submit jobs for remote execution

21. GECEM portal File Selection Job Submission Portlet Data Mesh Solver RFT GRAM gnuplot GridSphere Portal + Tomcat Credential Management Logon MyProxy OGSA OGSI (GT3)

22. Deploy and startup • make sure $CATALINA_HOME environment variable is set to the rootdir of the tomcat installation • startup tomcat point your browser to http://localhost:8080/gridsphere/gridsphere

23. Gecem Portal Login

24. Gecem Portal

25. Configure GridPortlet

26. Credential Management

28. Select File

29. Submit Job

31. Visualize Output

32. Prerequisite Software Java 2 Standard Edition version 1.4.2 or higher.  Apache Ant version 1.6 + GridSphere 1.1.2 Grid portlets web application (CVS) Globus Toolkit (GT3) Software

33. Limitations • The standards and technology are changing • Globus 3 was still in development • GridSphere was still in development • Grid Portlets web application was still in CVS version

34. Limitations • The codes are not stable • The codes was not compatible between versions especially from Gridportlets • Credential Management • File Transfer • File Browser • Difficult to integrate the works done from one version to the other

35. Advantages of GridSphere • User interface is great to hide the complexity of accessing grid resources • One single password is needed to access different resources • Portlet API similar to Java Servlet API • User Interface tag library • Use of third-party portlet • JSR-168 compliant

36. Related Work • Alliance Portal at Indiana University • Open Grid Computing Environment (OGCE) • Sakai Project (http://www.sakaiproject.org) • CHEF • Gridport 3.0

37. Under Development • Use GridSphere 2.0 as the portlet-based portal • GridPortlets • myproxy authentication, Credential Management and Retrieval • Use GridFTP for file transfer • Meshes and Solvers as OGSA grid services • Data Portlet to select files using a file browser • UDDI Portlet to publish and inquire web services • Portlets to invoke grid services

38. Future Work • Integrate with the Web Service provided by Swansea • Use workflow model • Extend GECEM grid to include all project partners

39. References • GridSphere • http://www.gridsphere.org/ • A Web Service Architecture for GECEM • Maria Lin, David Walker, Yu Chen and Jason Jones • At AHM2004