This is a common approach for geographically distributed Oracle systems. A centralized processor does all the work, while remote data hubs access the data.
The computers at the remote nodes act only as data servers, with all the processing being done by a large central processor.
The main advantage to this approach is the proximity of the data to the user in a distributed network, and the main disadvantage is the lack of centralized control over backup and recovery of the data.
This is the standard configuration for Oracle Network Services.
Due to the volatile nature of corporate computing that existed during the 1990's many corporations were faced with the issue of managing widely distributed database systems, spanning geographical areas, hardware platforms and database architectures.
Other shops embraced
- downsizing and
and reated situations where many diverse islands of information were spread across many computer networks.