Homework Help is Here – Start Your Trial Now!
Engineering
Computer Science
Many applications need the generation of sequence numbers for each transaction to function properly. If a sequence counter is locked in a two-phase fashion, it has the potential to create a bottleneck for concurrent operations. Explain why you believe this is the case. The majority of database systems offer built-in sequence counters that are not locked in a two-phase manner; instead, when a transaction requests a sequence number, the counter is locked, increased, and unlocked in the same transaction. Describe how such counters may help to increase concurrency. Provide an explanation for why there may be gaps in the sequence numbers associated with the final set of committed transactions.

Many applications need the generation of sequence numbers for each transaction to function properly. If a sequence counter is locked in a two-phase fashion, it has the potential to create a bottleneck for concurrent operations. Explain why you believe this is the case. The majority of database systems offer built-in sequence counters that are not locked in a two-phase manner; instead, when a transaction requests a sequence number, the counter is locked, increased, and unlocked in the same transaction. Describe how such counters may help to increase concurrency. Provide an explanation for why there may be gaps in the sequence numbers associated with the final set of committed transactions.

Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Chapter10: Transaction Management And Concurrency Control
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question

Many applications need the generation of sequence numbers for each transaction to function properly.

  1. If a sequence counter is locked in a two-phase fashion, it has the potential to create a bottleneck for concurrent operations. Explain why you believe this is the case.

The majority of database systems offer built-in sequence counters that are not locked in a two-phase manner; instead, when a transaction requests a sequence number, the counter is locked, increased, and unlocked in the same transaction.

  1. Describe how such counters may help to increase concurrency.

Provide an explanation for why there may be gaps in the sequence numbers associated with the final set of committed transactions.

 

Expert Solution
steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Types of Database Architectures
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
Recommended textbooks for you
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781285196145
Author:
Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:
Cengage Learning
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781305627482
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS