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NaradaBrokering is an open-source technology, based on the publish/subscribe paradigm, supporting a suite of capabilities for reliable/robust flexible messaging. This middleware infrastructure is designed around a scalable distributed network of cooperating message routers and processors. NaradaBrokering supports:

• High-performance Collaborative environments.
• Core Web and Grid capabilities

NaradaBrokering is funded in part by the United States National Science Foundation (NSF) and the Open Middleware Infrastructure Institute (OMII) of the United Kingdom.

Contact:
Geoffrey Fox (gcf@indiana.edu)
Shrideep Pallickara (spallick@indiana.edu)
URL: http://www.naradabrokering.org

Current Capabilities: Transport and Pub/Sub capabilities

• Multiple transport support: Transport protocols supported include TCP, Parallel TCP streams, UDP, Multicast, SSL, HTTP and HTTPS.
• Subscription Formats: Communications through authenticating proxies/firewalls & NATs. Subscription can be Strings, Integers, XPath queries, Regular Expressions, SQL and tag=value pairs.
• Messaging Related Compliance: Java Message Service (JMS) 1.0.2b compliant. Support for routing P2P JXTA interactions.

Current Capabilities: Quality Of Services and Grid/Web application support

• Reliable delivery: Robust and exactly-once delivery of messages in presence of failures
• Ordered delivery:
  - Producer Order and Total Order over a message type
  - Time Ordered delivery using Grid-wide NTP based absolute time
• Recovery and Replay:
  - Recovery from failures and disconnects.
  - Replay of messages while preserve time-spacing between them.
• Security: Secure end-to-end delivery of messages
• Message Payload options:
  - Compression and Decompression of payloads
  - Fragmentation and Coalescing of payloads
• Grid Application Support:
  - NaradaBrokering enhanced Grid-FTP.
  - Bridge to the Globus Toolkit-3.
  
• Web Services: WS-Eventing, WS-ReliableMessaging and WS-Reliability

Forthcoming features

• Redundancy and Failure resilience
• Support for fault-tolerant replicated distributed stable storage

Applications using NaradaBrokering

• Shared Display for collaborative applications
• PDA cell phone integration with Grid sharing applications, whiteboard, audio/video and SVG
• Message-based MVC clients with SVG as example
• Collaborative PowerPoint and OpenOffice
• SERVOGrid Earthquake Prediction Grid
• Audio/Video Conferencing applications (GlobalMMCS)

Copyright 2005, The Trustees of Indiana University