March 2022
Intermediate to advanced
682 pages
22h 58m
English
Content preview from Databases Illuminated, 4th Edition
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11.7 Need for Recovery
Recovery after any failure consists of restoring the database to a correct state. There are many different types of failures that can affect database processing. Some failures affect main memory (including database buffers) only, while others involve disk storage or backup storage devices. Among the causes of failure are the following:
Natural physical disasters such as fires, floods, earthquakes, or power outages
Sabotage or intentional contamination or destruction of data, hardware, or software facilities
Carelessness or unintentional destruction or contamination of data or facilities by operators or users
Disk malfunctions such as head crashes, defective disks, or unreadable tracks, which might result in loss of stored ...
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