What is the fail over feature provided by the Application Module?

The fail over feature decides when and how often passivation happens. When this feature is turned on, the application module state is turned on everytime an application module instance is returned back to the AM pool by the data control.

The advantage of this feature is that the user application state (model state), remains intact.

When should this feature be enabled/used?
This feature should be enabled only in the applications where its absolutely critical not to lose the data entered by the users at any cost.
Mostly it should be enabled, when we are dealing with a clustered environment.

When should we keep away from using this feature?
When this feature is enabled, passivation/activation happens for every request. This brings down the performance of the system . So in applications where its not critical to lose data, do no enable this feature. Especially when we are not dealing with a clustered environment then do not enable this feature.

How to enable/disable it?
This feature can be enabled or disabled by selection appropriate properties in the application module configuration on the Pooling and Scalability tab of the Business Components Configuration dialog.

 What is the default configuration?
This feature is disabled by default.