Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Expert Solution & Answer
Chapter 24, Problem 1PE
Explanation of Solution
Log-Structured Merge-Tree (LSM Tree):
- The Log-Structured Merge is an important technique used in many modern data stores.
- The LSM tree is a data structure is designed to provide low-cost indexing for files experiencing a high rate of inserts. It is done over an extended period.
- The LSM trees perform better on update queries.
Reason for LSM is preferred:
- Compared to LSM trees, the buffer trees require more random I/O for insert operations. This is the major difference between buffer trees and LSM trees.
- The LSM perform more sequential I/O operations.
- LSM trees are preferred because, for Big Data setting where data is resident on magnetic disks, random I/O is significantly more expensive than sequential I/O.
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