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# Synchronization

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You can configure synchronization strategy that a coordinated cache uses to determine what it broadcasts when an object changes. You can configure this at the project (see "Configuring Cache Coordination Change Propagation at the Project Level") or descriptor ("Configuring Cache Coordination Change Propagation at the Descriptor Level") level as follows:

- invalidate changed objects–Propagate an object invalidation that marks the object as invalid in all other sessions. This tells other sessions that they must update their cache from the data source the next time this object is read. Oracle recommends using this synchronization strategy.

- synchronize changes–Propagate a change notification that contains each changed attribute.

- synchronize changes and new objects–Propagate a change notification that contains each changed attribute. For new objects, propagate an object creation (along with all the new instance's attributes).