The leaf nodes of a B+-tree file organization may lose sequentiality after a sequence of inserts. The leaf nodes of a B+-tree file organization may lose sequentiality after a sequence of inserts. To minimize the number of seeks in a sequential scan, many databasesallocate leaf pages in extents of n blocks, for some reasonably large n.When the first leaf of a B+-tree is allocated, only one block of an n-blockunit is used, and the remaining pages are free. If a page splits, and itsn-block unit has a free page, that space is used for the new page. If then-block unit is full, another n-block unit is allocated, and the first n∕2 leafpages are placed in one n-block unit and the remaining one in the secondn-block unit. For simplicity, assume that there are no delete operations. The technique of redistributing values to siblings to improve space utilization is likely to be more efficient when used with the preceding allocation scheme for leaf blocks. Explain why.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
icon
Related questions
Question

The leaf nodes of a B+-tree file organization may lose sequentiality after a sequence of inserts. The leaf nodes of a B+-tree file organization may lose sequentiality after a sequence of inserts. To minimize the number of seeks in a sequential scan, many databases
allocate leaf pages in extents of n blocks, for some reasonably large n.
When the first leaf of a B+-tree is allocated, only one block of an n-block
unit is used, and the remaining pages are free. If a page splits, and its
n-block unit has a free page, that space is used for the new page. If the
n-block unit is full, another n-block unit is allocated, and the first n∕2 leaf
pages are placed in one n-block unit and the remaining one in the second
n-block unit. For simplicity, assume that there are no delete operations. The technique of redistributing values to siblings to improve space
utilization is likely to be more efficient when used with the preceding
allocation scheme for leaf blocks. Explain why.

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Types of trees
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education