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Chapter 12: Problem 18

Discuss the guidelines for physical database design in RDBMSs.

Short Answer

Expert verified
Physical database design in RDBMSs is about transforming a data model into a physical data layout. The steps involved are defining storage format, class of storage structures, auxiliary structures, user interface, integrity rules, and security measures. Key considerations include workload, understanding of RDBMS, hardware factors, and trade-offs between retrieval speed and storage cost.

Step by step solution

01

Definition of Physical Database Design

Physical database design is the process of transforming a data model into the physical data layout of a relational database. It signifies the stage where the abstract data model is turned into a running system with actual storage requirements and performance characteristics.
02

Significance of Physical Database Design

Physical database design plays an important role in establishing the performance parameters for RDBMSs. It determines how the data enters the system, how it is stored, managed, and retrieved. Therefore, it's essential to understand its significance for ensuring efficient utilization and management of data in an RDBMS.
03

Steps in Physical Database Design

The primary steps involved in physical database design are:1. Defining storage format for each attribute – how data is stored physically.2. Defining the class of storage structures - deciding where to store data (e.g., index, hash table).3. Choosing the auxiliary data structures – these help in implementing base structures (e.g., B+ tree for implementing indices).4. Designing user views – defining the interface that will be seen by the user.5. Defining the integrity rules – these enforce the business rules on the database.6. Defining the security measures – these protect the data from unauthorized access.
04

Key Considerations for Physical Database Design

Key factors to consider during physical database design are: 1. The type and extent of anticipated workload.2. Understanding of the functionality and limitations of the RDBMS3. Hardware considerations like storage capacity, processor speed, among others.4. The trade-off between data retrieval speed vs storage cost.

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