An approach to detecting relevant updates to cached data using XML and active databases
Essam A. H. Mansour, Hagen Höpfner · 2009
Client/server information systems use caching techniques to reduce the volume of transmitted data as well as response time and, especially in the case of systems with mobile clients, to reduce energy consumptions. Updating the server database might cause inconsistencies between server data and cached data. Guaranteeing consistency at least demands to invalidate outdated caches. To avoid invalidation of caches that are not affected by a particular update one must check the relevancy of each update for each cache. It has been proven, that this can only be done on a stateful server.