Copyright © TIBCO Software Inc. All Rights Reserved
Copyright © TIBCO Software Inc. All Rights Reserved


Chapter 28 Domain Objects Configuration : Configuring Domain Object Settings

Configuring Domain Object Settings
TIBCO BusinessEvents Express  This section relates to Cache OM functionality and does not apply to TIBCO BusinessEvents Express edition.
Domain object settings let you configure various behaviors for objects generated by the inference engines and stored in a cache. Many options relate to the way objects move between cache and backing store, so that you can tune memory usage and performance as needed.
You can configure the various behaviors globally (at the default level) and you can set overrides at the object type level. (Not all object level settings, however, are overrides.)
The main options are as follows. (Other options pertain to more specific situations and all are documented in the reference tables.)
The mode: Cache plus Memory, Cache Only, or Memory Only. See Chapter 8, Cache Modes and Project Design in TIBCO BusinessEvents Architect’s Guide to understand the effect of the different modes. Cache plus Memory (Cache + Memory in the UI) is a deprecated feature.
At the individual object type level only, you can also configure the following:
The settings are applied at the object level. For example, a contained concept can have a different limited cache setting from its container concept, and could be evicted from the cache at a different time.
Configuring Preloading Options
Preloading refers to the loading of the cache with objects from the backing store, at system startup. If you do not preload, then the objects are loaded as needed, which can affect performance the first time each object is requested, depending on the size of the objects.
At the default level, you can choose to preload or not preload two types of items separately: the objects themselves, and the handles to the objects, which are stored in a separate table called the object table. You can also specify the number of objects to preload (one setting for both types of items).
At the individual object level, you can override the preload setting as follows:
You can also specify (or override) how many objects to preload.
To Configure the Cluster Tab Domain Object Settings and Properties
1.
Add a CDD as explained in Adding a Cluster Deployment Descriptor (CDD), or open an existing CDD, configured for Cache OM.
2.
3.
a.
b.
At the Entity Selection dialog, select the ontology object type or types you want to configure and click OK. The first entity in the list is selected and the configuration section for the entity displays on the right.
c.
Select the /uri node for each selected entity in turn and configure the settings on the right as needed. You can also edit existing override entries, and remove entries not needed (by clicking Remove). See CDD Cluster Tab Domain Object Override Settings Reference.
4.

Copyright © TIBCO Software Inc. All Rights Reserved
Copyright © TIBCO Software Inc. All Rights Reserved