Cloud Computing Basics by T.B. Rehman

Author:T.B. Rehman
Language: eng
Format: mobi, epub
Publisher: Mercury Learning and Information
Published: 2018-02-09T05:00:00+00:00

4.16.1HDFS Features

Best suited for the distributed storage and processing.

Built-in servers of Namenode and Datanode help users to easily check the status of clusters.

Hadoop provides a command interface to interact with HDFS.

Streaming access to file system data.

HDFS provides file permissions and authentication.

4.16.2HDFS Architecture

Figure 4.24 shows the architecture of a Hadoop File System.

FIGURE 4.24An HDFS architecture

HDFS follows the master-slave architecture and it has the following elements:

Namenode

The Namenode is the commodity hardware that comprises of GNU/Linux operating system and the Namenode software. It is software that can be run on commodity hardware. The system having the Namenode acts as the master server and it does the following tasks:

Manages the file system Namespace

Regulates a client’s access to files

Executes file system operations such as renaming, closing and opening files, and directories

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