What is Hoarding

Redundant data management is a must in client server information systems with mobile clients. Based on the level of autonomy of mobile devices/ users techniques for handling such data can be divided into caching, hoarding, and replication. These three terms are often used incorrectly in the literature. To our knowledge the exact definition of the terms has never been published in an international book or journal. We fill this gap with this article. We furthermore explain the terms cache replacement, cache invalidation, cache maintenance, automated hoarding, and synchronization of replicated data.