Transcript VLAB Framework (afternoon)

VLAB Framework (afternoon)
Gordon Erlebacher
Principal IT Investigators
• University of Minnesota
– Prof. David A. Yuen : Dept. of Geology and Geophysics
• Martin D. Lyness
– Prof. Renata Wentzocvitch : Dept. of Chemical Engineering
and Materials Science
• Dr. Cesar da Silva
• Pedro da Silveira
• Florida State University
– Prof. Gordon Erlebacher : School of Computational Science
• Evan F. Bollig
• Indiana University
– Dr. Marlon Pierce : IU Community Grids Lab
Student Internships
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Ana Sallstrom (UMN): Workflow Visualization
Javier Roman (UMN): Making Vlab Secure
Frank Lyness (UMN): Remote Visualization, Ajax
Mike Nielson (UMN): Managing Vlab resources using J2EE
Dan Rao (UMN): Potential Repository
Laurie Labadie (FSU): Interactive Data Mining of
Workflows
• Celine Gestas (FSU): Lineplot Visualization
WATT: An Overview
On the Web: http://www.gorerle.com/vlabwiki/index.php?title=WATT
• The Web Automation and Translation Toolkit (WATT)
• Automates the conversion of software, specifically for
the internet.
• Translates source code to incorporate new
technologies.
• Translator was written in Ocaml language
• Currently supports direct compilation of VTK
(http://www.vtk.org) Tcl scripts into remote
visualization web services.
• Watt-live
– http://vlab2.scs.fsu.edu/watt-live/
WATT : Design
• Tcl scripts written for VTK are sent to our Watt Compiler
• WATT generates C++ calls for VTK and adds template calls to
gSOAP (http://www.cs.fsu.edu/~engelen/soap.html)
• gSOAP headers autogenerated by WATT are compiled by the
soapcpp2 compiler to produce SOAP enabled C++ objects
• WATT output plus additional gSOAP output are compiled together
to produce a single binary visualization web service
Watt: next steps
• Restructure Watt to avoid translation
from Tcl to C++ (time consuming)
• Automatically generate graphical user
interfaces:
proc AddContours { numContours rangeMin rangeMax } {
#WATT_GUI_SETVALUE "Generate Contours" "# of contours" "min"
"max”
….
Portlet Interfaces :: Overview
• Using Gridsphere 2.1 portlet container and
grid libraries (http://www.gridsphere.org)
– JSR 168 standard portlets
• VLab PWscf Portlets
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Already submitted and completed jobs
Project input revisions
Status and advanced submission monitoring
Visualization Clients
Pseudo-Potential Repository
Project Manager Portlets
The Project manager
(left two portlets) is
integrated into many
portal tabs to show
the user his/her
current project status
and an overview of
all projects
maintained by the
portal.
The input portlets
(right) walk you
through entering
important calculation
information about the
project.
Advanced Monitoring
Job monitor
tracks progress
of project
submission
Detailed view
allows for
advanced
manipulations
within each
workflow step
Charge Density Visualizations
• Uses multiple technologies:
Java Servlet, gSOAP Web
Service, JSR 168 Portlet,
AJAX, CSS2, & JSP
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Generates visualizations
using WATT generated web
services
•
Interacts dynamically with
the visualization service
using Java Reflection
libraries within a Servlet
which is accessed via AJAX
within the Gridsphere portlet
interface.
Pseudo-Potential Repository
Access to
multiple
databases
Create/delete/edit
atoms, pseudo
potentials and
exchangecorrelation
functionså
Workflow Visualization Applet
Getting it online
(simplifed workflow view)
• What’s left?
– Reading in projects
from the job monitor
– Rearranging the tree
to make reading
tasks easier
– Working on it!
Thermodynamic Visualization
• Built as a WebStart application based on
VisAd
• Takes output from Phonon code and allows
user to plot the data in one or multiple
output files
Future Perspectives
• Investigating Ruby on Rails framework as a viable
development platform.
– Highly abstracted for rapid development
• Enhanced Interface design using various CSS &
AJAX techniques
– JavaScript 3D for inline browser remote visualization
trackball style manipulations
• Expanding Services:
– Dynamic workflow generation
– Improved Visualization Services
Next steps
• Seek some physicists with no
knowledge of the portal system who
would be willing to try it out and provide
feedback
• We’d like to sollicit feedback for a fixed
time period before prioritizing issues
and addressing them
VLab Activities
On the web: http://vlab.msi.umn.edu/events/
• Workshops & Seminars
– Second VLab Workshop - will take place at the University of
Minnesota Walter Library Room 402, August 5-10, 2007.
• http://vlab.msi.umn.edu/events/secondworkshop.shtml
• Tutorials
– No currently scheduled events.
• Summer Research Internship (Univ. of Minnesota)
– Undergraduate students, each from unique educational disciplines
actively participate in research and development of novel
technologies for VLab.
• Nuggets: Short Research Bulletins
– Straight to the point updates as we accomplish new goals
– http://vlab.msi.umn.edu/reports/nuggets/
The WATT Compiler
• Uses type-inference to convert typeless Tcl to strictly-typed C++
• Compiler is language independent; configuration modules define
input and output syntax.
• Register and Interrupt systems allow the compiler to reconfigure
itself as it runs.
– Parser for input configuration files registers new types or
translations that are immediately available for use.
– Interrupts are invoked by registered inputs and result in unique
output (i.e. Tcl “set a 1” --> C++ “int a = 1;”)