Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Question
Chapter 10, Problem 10.1RQ
Program Plan Intro
a. Definition of the term Hadoop.
Expert Solution
Explanation of Solution
Hadoop is a complete package of framework that makes it possible to deal with data using cheap commodity hardware machines. We know that it is costly to store and process the data in a single machine because machine with that kind of computation power and memory is very expensive. What Hadoop does is, it combines the power of many cheap commodity machines as one by storing and processing the data in a distributed fashion over cluster of commodity machines.
Hadoop uses popular MapReduce technique (explained in next section) to achieve this.
Program Plan Intro
(b)
Definition of the term MapReduce.
Expert Solution
Explanation of Solution
Map Reduce is a processing technique used in Hadoop based on Java. It is a combination of two individual processing techniques.
- Map: Map technique takes the input data and transform it into another set of data that is tuple(key/value) pair.
- Reduce as name suggests reduces or combines the output from map into a smaller set of data(tuples).
Program Plan Intro
(c)
Definition of the term HDFS.
Expert Solution
Explanation of Solution
HDFS (Hadoop File System) is a distributed file
HDFS follows the master-slave architecture. Where Namenode acts as a master and Datanode acts as a slave.
Namenda: - It manages the namespace of file system, client’s access to file and controls the operations like renaming, opening and closing a file.
Datanode: - It acts as the instruction received from Namenode which includes file I/O(read/write), block creation, deletion and replication.
Pig as name suggests who eats anything, it is an abstraction layer on the top of MapReduce technique to analyze Big data using the representation of data flow.
Program Plan Intro
(d)
Definition of the term NoSQL.
Expert Solution
Explanation of Solution
As name suggest NoSQL means non-relational. In a nutshell NoSQL is a
Program Plan Intro
(e)
Define the term Pig.
Expert Solution
Explanation of Solution
Pig as name suggests who eats anything, it is an abstraction layer on the top of MapReduce technique to analyze data using the representation of data flow.
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Chapter 10 Solutions
Modern Database Management
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