WebSphere Application Server - Express, Version 6.0.x     Operating Systems: AIX, HP-UX, Linux, Solaris, Windows

Interoperating with schedulers

Why and when to perform this task

Schedulers support forward compatibility. Tasks created in previous versions of WebSphere Application Server Enterprise Edition 5.0 or WebSphere Business Integration Server Foundation 5.1 continue to run in WebSphere Application Server, Version 6 schedulers. Tasks that you create using Version 6 are not compatible with product schedulers from Version 5 or earlier. Version 5 schedulers do not run any Version 6 tasks.

All schedulers that are configured to use the same database and tables are considered a clustered scheduler. To guarantee that your tasks will run correctly, all servers in a scheduler cluster must be at the same version. If the servers are at different versions, tasks created with a Version 6 scheduler may not run. If a mixed-Version environment is required for a short period of time, then all scheduler poll daemons should be stopped on all Version 5 servers to allow a Version 6 server to run all tasks. This action allows the Version 6 schedulers to obtain leases and run tasks that have been created with a Version 6 scheduler.

Running tasks created with schedulers prior to Version 5.0.2 is not supported. See the topic, "Interoperating with the Scheduler service," in the WebSphere Application Server Enterprise Edition Version 5.0.2 information center for details on how to migrate these tasks to a more recent version. See the Information Center Library to access the Version 5.0.2 information center.

[Version 6.0.2]The 6.0.2 scheduler has several features that are enabled through custom properties and through new com.ibm.websphere.scheduler.Scheduler API methods. Version 6.0 or 6.0.1 schedulers ignore the new feature settings when tasks run that use a redundant or clustered scheduler. Mixed-version scheduler nodes (Version 6 and higher) are permitted only if no Version 6.0.2 features are used. See the Learn about scheduler topic for a summary of the new features.




Related tasks
Configuring schedulers

Related reference

Task topic    

Terms of Use | Feedback

Last updated: Jun 8, 2005 12:45:23 PM EDT
http://publib.boulder.ibm.com/infocenter/wasinfo/v6r0/index.jsp?topic=/com.ibm.websphere.express.doc/info/exp/scheduler/tasks/tsch_interop.html

© Copyright IBM Corporation 2004, 2005. All Rights Reserved.
This information center is powered by Eclipse technology. (http://www.eclipse.org)