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: Cengage Learning
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Chapter 11, Problem 15RQ
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RAID:
- RAID stands for “Redundant Array of Independent Disks”.
- It is used to maintain equilibrium between the performance and fault tolerance.
- They utilize multiple disks in order to create virtual disks (storage volumes) that are made out of several individual disks.
- They can make improvement in the performance and fault tolerance.
RAID levels:
The below are the levels of RAID:
Level 0:
- It holds data blocks that are spread over the separate drives.
- They are also called as stripped array.
- It is capable of providing increased performance.
- It does not provide fault tolerance.
- It requires minimum two drives.
Level 1:
- It holds data blocks that are being written duplicated in separate drives...
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Chapter 11 Solutions
Database Systems: Design, Implementation, & Management
Ch. 11 - Prob. 1RQCh. 11 - What index should you create? Write the required...Ch. 11 - What is the focus of most performance-tuning...Ch. 11 - What are database statistics, and why are they...Ch. 11 - How are database statistics obtained?Ch. 11 - What database statistics measurements are typical...Ch. 11 - How is the processing of SQL DDL statements (such...Ch. 11 - In simple terms, the DBMS processes a query in...Ch. 11 - If indexes are so important, why not index every...Ch. 11 - What is the difference between a rule-based...
Ch. 11 - Prob. 11RQCh. 11 - What are some general guidelines for creating and...Ch. 11 - Prob. 13RQCh. 11 - Prob. 14RQCh. 11 - Prob. 15RQCh. 11 - SELECT SELECT EMP_LNAME, EMP_FNAME, EMP_AREACODE,...Ch. 11 - Problem 1 and 2 are based on the following query:...Ch. 11 - Using Table 11.4 as an example, create two...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Prob. 6PCh. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Problems 1721 are based on the following query:...Ch. 11 - SELECT SELECT P_CODE, P_DESCRIPT, P_PRICE,...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Prob. 27PCh. 11 - Problems 27 and 28 are based on the following...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...
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- A database administrator can choose how many disks are organized into a single RAID 5 array. What are the trade-offs between having fewer disks versus more disks, in terms of cost, reliability, performance during failure, and performance during rebuild?arrow_forwardIn order to better understand RAID 5, please explain its functions. Are there any situations when RAID 5 is better than the other alternatives?arrow_forwardThe number of disks that are put together in a single RAID 5 array may be specified by a database administrator. What are the trade-offs between having fewer disks vs having more disks in terms of cost, longevity, performance after failure, and performance during rebuilding?arrow_forward
- In the DBLC process, what function does the data dictionary serve?arrow_forwardWhat's the lowdown on the DBMS driver?arrow_forwardThe number of disks that are clustered together in a single RAID 5 array may be specified by the database administrator. Is it better to have fewer disks or more disks? What are the trade-offs between having fewer disks and having more disks in terms of cost, durability, performance during failure, and performance during rebuild?arrow_forward
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