1. Gateway and Web Services
PTLIU Laboratory for Community Grids
Geoffrey Fox, Marlon Pierce
Computer Science, Informatics, Physics
Indiana University
Bloomington IN 47404

2. XML based Interfaces WSDL
Java C++ .. Proxy
HPC Engine
MPI ..
SOAP IIOP RMI …..
XML based Interfaces WSDL
Data
base
Persistent Storage
Parallel I/O …
Simulation Component
Data Component
Backend Resources
Middle Tier
Client

3. Have Portal – will make Web Service
Gateway ( is a relatively mature portal supporting Job submission, management and some visualization for codes like ANSYS – developed for DoD HPC centers
backend
SOAP wrapper
Add Castor Java to XML
backend
Globus rcp/rsh
Will replace historical CORBA
By EJB
CORBA
Corba middle tier SECIOP with Java modules
JSP SSL
Available
For GCE testbed January 2002
WSDL

4. Have Collaboration System – will build Collaborative Portal
is Garnet collaboration system used for distance education and simple collaborative computing with Gateway
Education is a nice web service!
Can use with Access Grid
Garnet uses GXOS XML events supported by Java message service for synchronous and asynchronous publish/subscribe
Garnet will be integrated with JXTA using a common message queue middle tier with multiple dynamic event brokers
Gateway can use GXOS – need to understand evolving Grid event models – allows more powerful collaborative portal as can dynamically share any event type
GXOS/Grid Event Schema needs extension to describe base scientific data types (arrays as in XSIL HDF) and higher level (e.g. meshes as in ICE)

5. Community P2P Grid Data base Generate “Automatically” GXOS Server JMS
JXTA Rendezvous