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Chapter 25: Problem 6

What is meant by data allocation in distributed database design? What typical units of data are distributed over sites?

Short Answer

Expert verified
Data allocation in distributed database design refers to the process of distributing different segments of a database across multiple physical locations. It aims to improve performance, reliability, and data consistency. The typical units of data distributed over sites include whole files of the database, file fragments, and replicated files.

Step by step solution

01

Define data allocation in Distributed Database Design

Data allocation in distributed database design refers to the operation of distributing different segments of a database across multiple physical locations. The main aim is to improve the system’s performance and reliability while ensuring data consistency.
02

Explain the purpose of Data Distribution in Databases

The main purpose of data distribution in databases is to enable system scalability, achieve data locality, increase data reliability and availability, and create backup redundancy. This distribution process could be in the form of horizontal partitioning, vertical partitioning, or replication.
03

Identify the Typical Units of Data Distributed over Sites

In a distributed data system, data is distributed in different units. The three main units are: a) Whole file or relations when the entire database file is stored at different locations, b) File fragments when the database file is partitioned horizontally or vertically and stored at different locations, and c) Replicated file, where the same file is stored in different locations.

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Most popular questions from this chapter

What are the main reasons for and potential advantages of distributed databases?

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