As we approach the next major Isode release, R14, we'll be publishing whitepapers and making a series of announcements highlighting some of the benefits of that release.
Today we're publishing a new whitepaper on the Isode website "Sending FLASH Messages Quickly: Techniques for Low Latency Message Switching and Precedence Handling", which should be of particular interest to those involved with X.400 messaging.
Military Messaging systems, and other messaging systems with time critical operational requirements such as Aviation (AMHS), require that high precedence messages are submitted, transferred and delivered very quickly.
In this whitepaper we look at how messages can be handled to achieve message switching times of a few hundred milli-seconds, for both low and high volumes of traffic. The importance of Permanent Associations as a way of avoiding delays in opening a connection is described and consideration is given to Precedence Handling, describing techniques that ensure high precedence traffic gets optimum (low) latency. The paper explains why message pre-emption is not a useful approach and why DiffServ is important when there are bandwidth limitations.
The use of DiffServ to set IP packet precedence based on message precedence is one of the enhancements made to M-Switch X.400 in R14.
The whitepaper which, like all Isode whitepapers, is free and can be viewed without registration, is available here.