Database System Concepts
7th Edition
ISBN: 9781260084504
Author: Abraham Silberschatz, S. Sudarshan, Abraham, Henry Korth, Silberschatz Abraham, Silberschatz Professor
Publisher: McGraw-Hill Education
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Expert Solution & Answer
Chapter 19, Problem 25E
Explanation of Solution
a.
Beginning of the analysis pass:
- The ARIES recovery
algorithm scheme will flush the pages continuously without even waiting for the checkpoint.- It also makes use of Log Sequence Numbers (LSN) for implementation.
- When a page is not included in the checkpoint dirty page at the start of the analysis p...
Explanation of Solution
b.
Rec LSN:
- Rec LSN is one of the entries in DPT, which is used to reflect the LSN at the end of the log, at the point when the page is added to the DPT.
- In the ARIES algorithm redo pass, the record is skipped if the LSN of the update log record is less than the Rec LSN of that page in DPT...
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