June 20, 2007 – IT Training and Consulting

Connection between Data Model and Data Warehouse

June 20, 2007June 20, 2007 Exforsys

Connection between Data Model and Data Warehouse Data models are required in order to build data warehouses. The problem is, those who develop data warehouses need to be able to show results at a fast pace. Data models are problematic in that they take a very long time to build. Is it possible, then to speed up the process somehow? The data that is in the data warehouse is the most atomic data that exists. The various data summaries and aggregations are external to the data warehouse, being found in… Read More

VSAM Catalogs

June 20, 2007December 17, 2008 Exforsys

VSAM Catalogs In this Mainframe tutorial, you will learn about VSAM Catalogs, Master Catalog, User Catalog and Data Space of VSAM. Master Catalog Master Catalog in VSAM is like captain of a ship, since all files used in VSAM is controlled by this master catalog. The attributes of files like password authorization for files, monitoring of operation performed on files, VSAM access for files, location of the file, space management of file, available free space in file are all monitored, managed and present in Master catalog. The above attributes are… Read More