Business information system Essay Example | Topics and Well Written Essays - 500 words

Business information system - Essay ExampleIn this paper we will discuss contrary aspects of entropy storage warehouse.This section will explain four important characteristics of data warehouse. These characteristics give a more clear view of data warehouse. First characteristic of data warehouse is Subject Oriented (Kimball & Ralph 2002), It means data warehouse should be built for a peculiar(prenominal) subject or domain. It also means that Data that provides information ab give away the concerning topic/ subject kind of of organizations ongoing processes. Second characteristic is integrated constitution of data warehouse. It Means data that is gathered from different sources are integrated into a single structure. Third characteristic is Time-variant It means all data that is stored in the data warehouse is recognized with a specific time period. Forth and last characteristic is Non-volatile nature of data warehouse. Data is never deleted from data warehouse. But when it ex ceeds from a certain level, it is archived and stored at differ places (Kimball & Ralph 2002). on that point is a question about data warehouse When data warehouse has data in terabits, and then how it chamberpot handle such amount of data? The answer is data warehouse uses tallyism mount to handle such amount of data. By this approach data is divided into small parts and parallel unit of data warehouse store retrieve and process them individually (Inmon 1995).Architecture of data warehouse consists of different logical layers (Inmon 1995). First layer is input or source layer, then processing layer, out put layer, decision support layer, etc. At source layer we have our data sources these can be data bases, legacy system or data from web. After extracting this data from the source a process of transformation is applied on it to bring it into coherent format. Because data can be extracted from any(prenominal) type of sources, it contains