Sun Microsystems iPlanet Integration Server 3.0, Process System Manual

Page: 155 / 368

Performing Application Upgrades
Chapter 5 Managing Registrations 155
Rolling Upgrades
Rolling upgrades must be used in production situations where work cannot be
interrupted and client applications cannot be upgraded monolithically. In a rolling
upgrade, the changeover from an earlier version to an upgraded version takes
placed gradually. It requires that the engine simultaneously support client
applications based on the earlier user profile as well as on the updated user profile.
To support differing versions of a user profile, designers create upgraded versions
of the validation and the assignment rules that can accommodate both the new and
old user profiles. Client application developers can then create new client
applications based on the new user profile.
➤
To perform a rolling upgrade
1.
Register the upgraded user profile, validation, and assignment rule
dictionaries.
2.
Deploy each upgraded client application to nodes supporting that client
application.
3.
When they choose to upgrade, users close sessions with the engine, shut down
their old client applications, start up their new, upgraded client applications,
open sessions with the engine, and resume work.