WSVLAM Introduction Systems and Network Engineering group Institute

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

Introduction • This presentation gives a quick introduction to the WSVLAM 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 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 GT 4= Globus Toolkit version 4 • More detailed description of the presented work can be found in the section of publication of the WS-VLAM home page 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 presentation You are an application developer: it will be enough for you to read the Developer’s guide & the WS-VLAM developers presentation WS-VLAM Introduction presentation

Outline • Introduction • Architecture of the WS-VLAM • Hierarchical workflow compositions & execution • Interoperability with other WMS • Conclusions WS-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. Uv. A, Amsterdam June 2007 WS-VLAM Introduction presentation

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

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

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

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

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

Second the Workflow developers … Workflow composition Workflow Distributed Workflow Management system Workflow execution Web Service Interface Application Templates Web service OGSA DAI Web Service Interface Workflow Grid Engine Services Application Webservice Services Web web service Grid Middleware: Data management Grid Middleware: Process & resource management Network & storage Resources Network & Computing Resources Data Management Stack Process Management Stack 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 (GT 4) Workflow Composer (GUI) o Thin client Repository for workflow components o Implemented also as WSRF service. WS-VLAM Introduction presentation

Conclusions • WSRF compliant middleware such as GT 4 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 WS-VLAM Introduction presentation

http: //www. vl-e. nl/ Uv. A, Amsterdam June 2007 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) 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 (GT 5 -GRAM, Direct, etc) • Fault tolerance • Control flow • Data provenance • Semantic Service discovery Uv. A, Amsterdam June 2010 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/ Uv. A, Amsterdam June 2010 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 GT 4 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. Uv. A, Amsterdam June 2010 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 GT 4 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. Uv. A, Amsterdam June 2010 WS-VLAM Introduction presentation

Workflow interoperability: Execute a VLAM workflow from Kepler/Taverna workbench Das 2 or Po. C facilities. GT 4 Java Container e ervic (2) S tion a Invoc VLAM Actor RTSM Client or Workfow Taverna processor Description (XML) (1) De Pro leg xy ate GRAM RTSM pre-ws-GRAM services Factory RTSM-GT 4 Web service RTSM Worker nodes Instance Delegation service Workflow components 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. Uv. A, Amsterdam June 2010 WS-VLAM Introduction presentation

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 GT 4 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, IPAW 2010, Troy, NY, USA Uv. A, Amsterdam June 2010 WS-VLAM Introduction presentation

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 1 st 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 Uv. A, Amsterdam June 2010 WS-VLAM Introduction presentation