1. WS-VLAM Introduction presentation WS-VLAM Introduction Systems and Network Engineering group Institute of informatics University of Amsterdam

2. WS-VLAM Introduction presentation Introduction This presentation gives a quick introduction to the WS- VLAM workflow management system It helps the reader understand the technology push which motivated our design, describes the current state and present the ongoing activities and planned ones. NOTE :  We are currently still working on the User ’ s and developer ’ s Guide, they are not available at this time. The presentations do not replace the documentation it just give a quick introduction.  Do not hesitate to contact us for further information Thanks for taking some of your time to read about the WS-VLAM work, any comments are more than welcome WS-VLAM developers gvlam-dev@lists.vl-e.nl

3. WS-VLAM Introduction presentation Needed background … To be able to follow the content of this presentation you will need to know about:  WSRF= Web Service Reference Framework WSRF  GT4= Globus Toolkit version 4 GT4 More detailed description of the presented work can be found in the section of publication of the WS-VLAM home pageWS-VLAM

4. WS-VLAM Introduction presentation Objective of this presentation… Why you should look at this presentations  You want to know how WS-VLAM works and interacts with the Grid middleware. Why you don ’ t have to worry if you do not understand the content on this presentation:  You are an end-user: it will be enough for you to read the User ’ s guide or the WS-VLAM composer presentationUser ’ s guide WS-VLAM composer  You are an application developer: it will be enough for you to read the Developer ’ s guide & the WS-VLAM developers presentationDeveloper ’ s guide WS-VLAM developers

5. WS-VLAM Introduction presentation Outline Introduction Architecture of the WS-VLAM Hierarchical workflow compositions & execution Interoperability with other WMS Conclusions

6. UvA, Amsterdam June 2007WS-VLAM Introduction presentation GVLAM: Enable end-users (scientists) to define, execute, and monitor e-science applications.  Location independent experimentation.  Application Domain portal. Provide application developers:  Abstract view of the Grid (shields the Grid details).  Easy way to port applications to the Grid.

7. WS-VLAM Introduction presentation The Virtual Laboratory for e-Science … Dutch telescience Data intensive science Medical diagnosis Generic e -science framework layer Application layer Bioinformatics ASP Bio diversity Food Informatics Grid layer

8. WS-VLAM Introduction presentation Process Management Stack Before and after OGSA/WSRF Network & Computing Resources Grid Middleware: Process & resource management Application Templates User Applications Workflow Management system Web Service Interface Data Management Stack Network & storage Resources Grid Middleware: Data management Web Service Interface

9. WS-VLAM Introduction presentation Process Management StackData Management Stack Workflow Management Systems Network & Computing Resources Grid Middleware: Process & resource management Application Templates User Applications Workflow execution Workflow composition Network & storage Resources Grid Middleware: Data management Workflow Management system Web Service Interface

10. WS-VLAM Introduction presentation Data Management StackProcess Management Stack Grid Service & OGSA-DAI Network & Computing Resources Network & storage Resources Grid Middleware: Process & resource management Grid Middleware: Data management Application Users Workflow execution Grid Services Grid Services Grid Services OGSA DAI Application Templates User Applications Workflow composition Workflow Management system Web Service Interface

11. WS-VLAM Introduction presentation Data Management StackProcess Management Stack First Application developers … Network & Computing Resources Network & storage Resources Grid Middleware: Process & resource management Grid Middleware: Data management Workflow execution Grid Services Application web service Grid Services Grid Services Application Templates User Applications Application Templates Web service Workflow composition Web Service Interface OGSA DAI Workflow Management system

12. WS-VLAM Introduction presentation Process Management Stack Second the Workflow developers … Data Management Stack Network & Computing Resources Network & storage Resources Grid Middleware: Process & resource management Grid Middleware: Data management Workflow execution Workflow composition Workflow Management system Grid Services Grid Services Grid Services Application Templates Web service Web Service Interface OGSA DAI Workflow Engine Web service Workflow Engine Web service Web Service Interface Application web service Distributed Workflow

13. WS-VLAM Introduction presentation WS-VLAM WMS… Goals  Create a WMS which adopt a Service Oriented Paradigm Approach  Workflow Engine (RTSM) o Implemented as a WSRF service using Globus 4 (GT4)  Workflow Composer (GUI) o Thin client  Repository for workflow components o Implemented also as WSRF service.

14. WS-VLAM Introduction presentation Conclusions WSRF compliant middleware such as GT4 offers useful basic services to develop a truly grid enabled workflow engine:  Delegation service and ws-notification mechanisms proved to be very useful Separating the workflow composition from execution suits better the Grid environments and improve interoperability OGSA-WG is collecting cases and input to decide which services should be standardized

15. UvA, Amsterdam June 2007WS-VLAM Introduction presentation http://www.vl-e.nl/

16. WS-VLAM Introduction presentation New workflow Components The workflow components developed the last year, can be still used and will be deployed on the shared workflow component repository on the rapid prototyping environment  Ridge-O-Grammar modules from (SP 1.5)  Kansk Toolbox from (SP 1.4)  AID web services (SP 2.2)  Virtual file system Web service (SP 2.4)  Generic workflow components (SP 2.5) o File Reader/Writer, o universal File Reader/Writer (SRB/GFTP/...) o Demos: MRIscanner, Histogram, Floatingball We will contact other SPs to integrate their components o Legacy code, or fully integrated code (java, C++, Python)

17. WS-VLAM Introduction presentation other tasks Access to the ws-vlam engine from Taverna Access to the ws-vlam engine from Kepler Parameter sharing among workflow components Job farming Support for more than one job submission mechanisms (GT5-GRAM, Direct, etc) Fault tolerance Control flow Data provenance Semantic Service discovery UvA, Amsterdam June 2010

18. WS-VLAM Introduction presentation References and download VLAM client can be downloaded from  www.science.uva.nl/~gvlam/wsvlam/ Documentation can be downloaded www.science.uva.nl/~gvlam/wsvlam/doc/ UvA, Amsterdam June 2010

19. WS-VLAM Introduction presentation Workflow interoperability: Execute a VLAM workflow from Kepler/Taverna A predefined Application workflow developed in VLAM can be executed as a single step in Kepler/Taverna  (no need to recompose graphically the whole workflow). The predefined Application workflow will be executed on any remote computing resource where the VLAM-RTSM GT4 Web service is installed. Advantages:  Compose workflow where sub-workflows (which require grid resources) are executed on grid-enabled resources, while the rest of the workflow is either executed using other Kepler actors or taverna processors  It is also more efficient, since it avoid the overhead which will result by wrapping every workflow component as a separated web service or a separate remote grid-execution.

20. UvA, Amsterdam June 2010WS-VLAM Introduction presentation Workflow interoperability: Execute a VLAM workflow from Kepler/Taverna A predefined Application workflow developed in VLAM can be executed as a single step in Kepler/Taverna  (no need to recompose graphically the whole workflow). The predefined Application workflow will be executed on any remote computing resource where the VLAM-RTSM GT4 Web service is installed. Advantages:  Compose workflow where sub-workflows (which require grid resources) are executed on grid-enabled resources, while the rest of the workflow is either executed using other Kepler actors or taverna processors  It is also more efficient, since it avoid the overhead which will result by wrapping every workflow component as a separated web service or a separate remote grid-execution.

21. UvA, Amsterdam June 2010WS-VLAM Introduction presentation Workflow interoperability: Execute a VLAM workflow from Kepler/Taverna GRAM services GT4 Java Container RTSM Factory Delegation service Worker nodes pre-ws-GRAM RTSM Instance Workflow components Kepler/Taverna workbench RTSM Client Workfow Description (XML) Das2 or PoC facilities. 1.Kepler/Taverna users can have access to some of the parameters of the Application workflow to change the default values 2.Kepler/Taverna users have to specify the location of the input data file as URL and will get back a URL if the Sigwin generate data files 3.Graphical output of the Application workflow are handled automatically by the VLAM Taverna processor /Kepler actor. RTSM-GT4 Web service VLAM Actor or Taverna processor (1) Proxy Delegate (2) Service Invocation

22. Some References 1.Science Z Zhao, A Belloum, M Bubak Editorial: Special section on workflow systems and applications in e-Future Generation Computer Systems 25 (5), 525-527 2.A. Wibisono, D. Vasyunin, V. Korkhov, AS.Z. Belloum WS-VLAM: a GT4 based workflow management system, The 2 nd International Workshop on Scientific Workflows, In conjunction with ICCS 2007, Beijing, China, 2007 3.A.S.Z. Belloum, V. Korkhov, S. Koulouzis, M. A Inda, and M. Bubak Collaborative e-Science experiments: from scientific workflow to knowledge sharing JULY/AUGUST, IEEE Internet Computing, 2011 4. Ilkay Altintas, Manish Kumar Anand, Daniel Crawl, Shawn Bowers, Adam Belloum, Paolo Missier, Bertram Ludascher, Carole A. Goble, Peter M.A. Sloot, Understanding Collaborative Studies Through Interoperable Workflow Provenance, IPAW2010, Troy, NY, USA UvA, Amsterdam June 2010WS-VLAM Introduction presentation

23. Some References 5.A. Belloum, Z. Zhao, and M. Bubak Workflow systems and applications, Future Generation Comp. Syst. 25 (5): 525-527 (2009) 6. Z. Zhao, A.S.Z. Belloum, et al., Distributed execution of aggregated multi domain workflows using an agent framework The 1st IEEE International Workshop on Scientific Workflows, Salt Lake City, U.SA, 2007 7.Zhiming Zhao, Adam Belloum, Cees De Laat, Pieter Adriaans, Bob Hertzberger Using Jade agent framework to prototype an e-Science workflow bus Authors Cluster Computing and the Grid, 2007. CCGRID 2007 UvA, Amsterdam June 2010WS-VLAM Introduction presentation