Cloud Warehousing

Autoren Hui Ma
Klaus-Dieter Schewe
B. Thalheim
Qing Wang
TitelCloud Warehousing
TypArtikel
JournalJournal of Universal Computer Science
Nummer8
Band17
MonatAugust
Jahr2011
Seiten1183-1201
SCCH ID#1033
Abstract

Data warehouses integrate and aggregate data from various sources to support decision making within an enterprise. Usually, it is assumed that data are extracted from operational databases used by the enterprise. Cloud warehousing relaxes this view permitting data sources to be located anywhere on the world-wide web in a so-called "cloud", which is understood as a registry of services. Thus, we need a model of data-intensive web services, for which we adopt the view of the recently introduced model of abstract state services (AS2s). An AS2 combines a hidden database layer with an operation-equipped view layer, and thus provides an abstraction of web services that can be made available for use by other systems. In this paper we extend this model to an abstract model of clouds by means of an ontology for service description. The ontology can be specified using description logics, where the ABox contains the set of services, and the TBox can be queried to find suitable services. Consequently, AS2 composition can be used for cloud warehousing.