An Architecture for Using Tertiary Storage in a Data Warehouse
Theodore J. Johnson · 1997
In this paper, we present an architecture for a data warehouse that provides convenient, flexible, and high-performance access to tape-resident data. Data warehouses allow an organization to store and analyze operational data. Many data warehouses (e.g., for telecommunications) create very large data sets that can be economically stored only on tertiary storage. At the same time, data analysts need to make a wide variety of decision support and data mining queries on the data. While one can (and typically does) extract compact summaries of the warehoused data, many queries can only be answered by using data from the full data set.