XCAT Science Portal Status

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XCAT Science PortalStatus Future WorkJuly
15, 2002

• Shava Smallen
• Extreme! Computing Laboratory
• Indiana University

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Outline

• Current Status
• Architecture
• Case Study Grappa
• US-ATLAS
• GriPhyN
• Future Work
• Recent developments
• Web portal frameworks portlets
• Application Factory Web Services (AFWS)
• Web Services for Remote Portals (WSRP)
• xportlets

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Motivation

• Lots of Grid tools services
• Requires a good deal of expertise to
• develop an application
• use an application (more than what many users
  want to know)

XCAT Science Portal screenshot

• Grid portal
• web portal by which users can access Grid tools
  services
• common approach

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XCAT Science Portal
(previously known as Active Notebook project )

• Grid portal framework for building personal
  science portals
• Active notebook (execution management)
• HTML pages to describe the features of the
  notebook and how to use it
• HTML forms which can be used to launch
  parameterizable scripts
• Results archived - parameters stored in a
  sub-notebook

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Scripts

• Very flexible
• Jython - access to Java classes
• Globus Java CoG kit
• XCAT
• XMESSAGES
• Not every user has to write scripts
• Notebooks can be shared among users
• Import/export capability

parameters
Invoke jython interpreter
jython script
portal
Launch app1
Grid
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XCAT Science Portal Architecture
Users Web Browser
Portal Web Server (tomcat server java servlets)
Jython Intepreter
Notebook Database
GSI Authentication
Grid
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Case Study Grappa

• Grappa Grid access portal for physics
  applications
• provide a Grid portal front-end by which
  physicists can manage computation and data
• Joint work with Rob Gardners group (IU Physics
  U. of Chicago Physics)
• Part of the ATLAS collaboration (US-ATLAS)
• Subproject of Grid Physics Network (GriPhyN)

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ATLAS

• Detector for the Large Hadron Collider (LHC) at
  CERN
• 2000 physicists, 150 universities
  laboratories, 34 countries

ATLAS detector

• Expected to be on-line in 2006
• Why the Grid?
• Raw data 2 PB/yr
• Analysis 8 PB/yr
• Participant in several Grid projects LCG,
  GridPP, INFN Grid, DataGrid, PPDG, GriPhyN/IVDGL

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XCAT Science Portal ATLAS

• Athena ATLAS software framework
• Athena Notebook Prototype/Demo
• ATLAS Software Week (March)
• Allow user to submit sequence of Athena job
  options files to US-ATLAS testbed resources
• File staging, remote job option file editing,
  basic monitoring, ad-hoc viz
• Packaged with Pacman installed with single
  command
• Distributed to US-ATLAS testbed this month
• Interactive jobs
• Production scripting interface to launch and
  portal to monitor

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GriPhyN Grid Physics Network

• Targets data-intensive applications
• ATLAS, CMS, LIGO, and SDSS

• Provide a set of tools for collaborative data
  analysis
• 90 of data is derived
• Virtual data - transparency with respect to
  location and materialization
• Data replicated distributed transfer or
  recompute

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Virtual Data Browser

• Search virtual data
• Publish virtual data create transformations and
  derivations

• User Profile bookmarks, credential mgmt,
  resource mgmt, etc.
• Provide functionality analogous to that of a web
  browser

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Outline

• Current Status
• Architecture
• Case Study Grappa
• US-ATLAS
• GriPhyN
• Future Work
• Recent developments
• Web portal frameworks portlets
• Application Factory Web Services (AFWS)
• Web Services for Remote Portals (WSRP)
• xportlets

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Web Portal Frameworks

• Separation of appearance functionality
• User customization of appearance (multi-user
  support)
• Functionality packaged into portlets

Jetspeed screenshot

• Examples IBM Websphere, Apache Jetspeed, etc.
• Many Grid portal efforts
• Encourages interoperability

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Application Factories

• Applications are difficult to deploy
• Libraries, licensing, environment setup, etc.
• E.g., Athena 10 GB library, Redhat 6.1
• Web services approach
• XCAT implementation
• App. factory web service (AFWS) is a stateless,
  persistent service and launches one instance of
  the application
• Distributed component applications
• Both individual components and composite
  application are web services

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WSRP Specification

• Web Services for Remote Portals
• Generic proxy portlet
• Talks to any remote WSRP-enabled web service
• Web service handles content
• WSRP web service registry
• Advantage?
• No installation required just contact WSRP web
  service

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Putting It Together
AFWS Registry
Portal
Grid
AFWS Application Factory Web Service
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xportlets

• Use Jetspeed as web portal framework
• Open source from apache
• xportlets bundle of portlets
• AFWS proxy portlet
• MyProxy portlet
• Xmessages pull
• GridFTP File Browser
• Scripting API to create Application Factories
• Different kinds XCAT, notebooks, etc.

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Summary

• Current XCAT Science Portal architecture
• Active notebooks, scripts
• Case Study Grappa
• US-ATLAS
• GriPhyN
• Redesign to portlet web services architecture
• Jetspeed takes care of presentation
• Interoperability pluggable into any
  portlet-enabled portal framework
• Easy deployment web services generic proxy

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More Information

• Extreme! Computing Laboratory
• http//www.extreme.indiana.edu
• XCAT Science Portal
• http//www.extreme.indiana.edu/xcatsp
• Grappa
• http//iuatlas.physics.indiana.edu/grappa
• xportlets (coming soon)
• http//www.extreme.indiana.edu/xportlets
• Email
• ssmallen_at_cs.indiana.edu

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Putting It Together
Archiving (sub-notebooks)
AFWS Registry
Portal
AFWS
Grid
jython scripts
Notebook(s)
AFWS Application Factory Web Service