January 2012
Intermediate to advanced
336 pages
11h 19m
English
Content preview from Express Learning: Database Management Systems
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11
Database Recovery System
1. Define recovery manager. What are the properties of transactions that it preserves?
Ans: The component of DBMS that is responsible for performing the recovery operations is called recovery manager. The main aim of recovery is to restore the database to the most recent consistent state.
The recovery manager ensures that the two important properties of transactions namely, atomicity and durability are preserved. It preserves atomicity by undoing actions of uncommitted transactions and durability by ensuring that all the actions of committed transactions survive any type of failure.
2. What information is maintained by recovery manager during normal execution of transactions?
Ans: The recovery manager maintains ...
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