Harness... the prototype

Features

Java Software Backplane

Portable (Java based), extensible (component based) and dynamic (event driven)
Loading and unloading plugins, VM (re)configuration, control console support

Distributed Control

Failure resilience, global state management
Arbitration algorithms, election,asynchronous updates

Native Language Support

C and dynamic library based plugin schemes for improved performance, legacy applications
Successfully tested on Solaris and WinNT, alternative to Java backplane

Programming Model Plugins

PVM plugin allows existing PVM applications to run unmodified
FT-MPI plugin provides fault tolerance within the MPI API
VIA plugin to exploit high performance communication within Harness

The HARNESS backplane is a 100% pure Java application written for Java 2 Platform. It has been successfully tested on Solaris, Win32, Irix and Linux.

Download Version 1.9.1

Download distribution: [ zip | tgz ]
Download sources: [ zip | tgz ]

What's new

Harness 1.9.1:

Bugfixes, bugfixes, ...
Threadable plugins and dynamically loaded native libraries no longer supported
Works with J2SE 1.4 (and, hopefully, 1.5, 1.6, ...)

Harness 1.9:

Stable version of PVM plugin
Improved p2p TCP transport plugin
Some bug fixes

Harness 1.9 beta:

PVM compatibility plugin rewritten from scratch
New spawner plugin
New multitransport plugin and extensions to p2p TCP transport plugin
Some bug fixes

Harness 1.9 alpha:

PVM compatibility plugin (alpha, proof of concept)
Numerous small improvements

Harness 1.8:

Harness Distributed Naming Service
Harness Distributed Meta-Debugger (alpha version)
2 new demo programs (benchmarking and Mandelbrot set generator)
reverse-DNS support to resolve local host names
customizable level of debug output

Harness 1.7:

First released distribution

Documentation

(See also: Papers)

HARNESS programming tutorial [Postscript]
Java Backplane control GUI user manual [Postscript] [PDF]
Javadocs for source files [HTML]

Browse CVS Repository