How to Install HDFS on Arch Linux

Hadoop Distributed File System (HDFS) is a distributed file system that provides reliable and scalable storage for big data applications. In this tutorial, we will guide you through the steps of installing HDFS on Arch Linux.

Prerequisites

Before proceeding with the installation, make sure that your system meets the following requirements:

• Arch Linux version 4.13 or higher
• JDK 1.7 or higher
• SSH installed and configured between nodes if you plan to install a multi-node Hadoop cluster

Step 1: Update Arch Linux

We start by updating the packages in Arch Linux by running the following command:

sudo pacman -Syu 

Step 2: Install Java Development Kit (JDK)

Hadoop requires JDK to be installed on your system. You can install the OpenJDK package by running the following command:

sudo pacman -S jdk8-openjdk 

Step 3: Download and extract Hadoop

Next, we need to download the Hadoop package from its official website. You can use the following command to download the latest stable release:

wget http://apache.mirror.rafal.ca/hadoop/common/hadoop-3.2.2/hadoop-3.2.2.tar.gz

Once the package is downloaded, extract it to a directory of your choice. In this tutorial, we will extract it to /opt/hadoop-3.2.2:

tar -xzvf hadoop-3.2.2.tar.gz -C /opt/

Step 4: Configure environment variables

Next, we need to configure the Hadoop environment variables in the /etc/profile file. Open the file using your favorite text editor and add the following lines:

export HADOOP_HOME=/opt/hadoop-3.2.2
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export HADOOP_HDFS_HOME=$HADOOP_HOME
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

Then, save and close the file.

Step 5: Configure Hadoop

Now, we need to configure Hadoop by modifying the hadoop-env.sh file located in $HADOOP_HOME/etc/hadoop. Open the file using your favorite text editor and add the following lines at the end of the file:

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib/native"

Then, save and close the file.

Step 6: Format HDFS

Before starting HDFS, we need to format it. Run the following command to format HDFS:

hdfs namenode -format

Step 7: Start HDFS

Finally, we can start HDFS by running the following command:

start-dfs.sh

You can verify that HDFS is running by accessing the web interface at http://localhost:9870.

That's it! You have successfully installed and configured Hadoop Distributed File System (HDFS) on Arch Linux.

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