May 2024
Intermediate to advanced
325 pages
12h 2m
English
Content preview from Distributed Database Systems, 1st Edition by Chhanda Ray
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Data Warehousing and Data Mining
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15.2.7 Archive/Backup Data
The data warehouse also stores the detailed data and the summarized data for archiving and back-
up. Although the summarized data can be generated from the detailed data, it is necessary to
backup the summarized data online. The data is transferred to storage archives such as magnetic
tapes or optical disks.
15.2.8 Metadata
Data about data are called metadata. The data warehouse stores the metadata information used by
all processes in the warehouse. A metadata repository should contain the following information.
A description of the structure of the data warehouse that includes the ...
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