5.7. Synchronous and Asynchronous Distribution

For example, with three caches in a cluster, cache A, B and C, and a key K that maps cache A to B. Perform an operation on cluster C that requires a return value, for example Cache.remove(K). To execute successfully, the operation must first synchronously forward the call to both cache A and B, and then wait for a result returned from either cache A or B. If asynchronous communication was used, the usefulness of the returned values cannot be guaranteed, despite the operation behaving as expected.