Hadoop is an open-source software framework written in Java for distributed storage.

Hadoop is an open-source software framework written in Java for distributed storage.

Hadoop is an open-source software framework written in Java for distributed storage and distributed processing of large data sets on computer clusters built from commodity hardware.

It provides a distributed file system (HDFS) that stores data on commodity machines, providing very high aggregate bandwidth across the cluster. It also provides a distributed processing platform (MapReduce) based on the Java programming language. 

Hadoop is designed to scale up from single servers to thousands of machines, each offering local computation and storage. 

Hadoop's distributed file system facilitates rapid data transfer rates among nodes and allows the system to continue operating uninterrupted in case of a node failure.

The base Apache Hadoop framework is composed of the following modules: Hadoop Common, Hadoop Distributed File System (HDFS), Hadoop YARN, and Hadoop MapReduce.

How to install and configure Hadoop

1. Download and Install Java

Before you can install and configure Hadoop, you will need to install Java. This is because Hadoop is written in Java and requires it to be installed on your system. 2. Download the Hadoop Package

Next, you will need to download the Hadoop Package. You can download the binary files from the Apache Hadoop website. 3. Set up SSH

Hadoop requires SSH in order to manage its nodes and communicate with them. You can set up SSH by following the instructions on the Apache Hadoop website. 4. Configure the Hadoop Environment

Once you have downloaded and installed Hadoop, you will need to configure it. This can be done by editing the core-site.xml, hdfs-site.xml, and mapred-site.xml files. 5. Start the Hadoop Daemons

Once you have configured the Hadoop environment, you can start the daemons. This can be done by running the start-all.sh command. 6. Verify the Installation

Once you have started the daemons, you can verify that the installation was successful by running the jps command. This will list all the Hadoop daemons that are running.

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