How to Download and Install Apache Cassandra on Ubuntu

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How to Download and Install Apache Cassandra on Ubuntu – Guide

Apache Cassandra is a powerful open source NoSQL database engine that offers fault tolerance, linear scalability and consistency across multiple nodes. Because of its distributed architecture, Apache Cassandra handles large amounts of data using Dynamo-style replication. Here, replicas are stored on multiple nodes in a cluster and therefore ensure high availability and zero point of failure. Apache Cassandra is ideal for IoT applications that collect large amounts of data. It’s also useful for social media analytics, messaging services, and retail apps.

Companies that use Apache Cassandra include Netflix, Facebook, Cisco, Hulu, Twitter and many more. The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and proven fault tolerance on commercially available hardware or cloud infrastructure make it the perfect platform for business critical data. Cassandra’s support for replication across multiple data centers is best-in-class, giving users lower latency and the peace of mind that they can survive regional outages.

Apache Cassandra on Linux

The Apache Cassandra NoSQL DB engine was created using the Java programming language and has the Apache 2.0 data protection license. The Apache Cassandra tool git repository contains all versions of Cassandra. The Apache Cassandra NoSQL database works with Java on Linux. It can read, write and repair databases.

On Linux, Apache Cassandra can actually help find bad cluster data in a huge amount of data; Furthermore, it has been used for decades due to its distributed storage method and flexibility. In this post we will see how to install Apache Cassandra on Linux.

Install Apache Cassandra on Ubuntu / Debian distribution

As Apache Cassandra is written in Java, obviously, you will need to have Java installed and configured on your system to install the Cassandra tool on Ubuntu and other Linux systems. Here, we will first install the Java packages on our Ubuntu machine, then we will install Apache Cassandra via the Java protocol and HTTPS.

Install Java on Ubuntu / Debian

Installing Java on Ubuntu and Debian distributions is easy and straightforward. First update the system repository and then run the following apt command to install Java on the system.

sudo apt update

sudo apt install openjdk-8-jdk -y

When the installation is finished up, you can run a quick version check to ensure that Java runs successfully. If you see other versions of java installed on the machine, make sure Java 1.8 is on the machine.

java -version

Install HTTPS Ubuntu Linux

HTTPS will allow the Apache Cassandra tool to run on Ubuntu Linux system. You can run the following apt command in the terminal shell to install the HTTPS protocol on the system.

sudo apt install apt-transport-https

Then the following commands to add the Cassandra key to the network protocols on your Ubuntu system.

sudo sh -c ‘echo “deb http://www.apache.org/dist/cassandra/debian 40x main”> /etc/apt/sources.list.d/cassandra.list’

wget -q -O – https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add

Install Cassandra on Ubuntu Linux

Finally, you can now run the commands given below to update the system repository and install the Apache Cassandra NoSQL DB engine on your Linux machine. If you install the Java and HTTPS protocols correctly on your system, the following commands will not take long to finish installing Cassandra.

sudo apt update

sudo apt-get install cassandra

Monitor Cassandra on Ubuntu

Monitoring the Apache Cassandra tool on Ubuntu requires root access to the system. At start, you can run the following node tool command to check Cassandra status, runtime details and cluster status.

The following system control commands will allow you to start and restart the Cassandra service. It will also let you know the status of Cassandra on your system.

sudo systemctl status cassandra

sudo systemctl start cassandra

sudo systemctl restart Cassandra

You can also use the following system control commands with superuser permission to stop and enable Cassandra services on your Linux machine.

sudo systemctl stop cassandra

sudo systemctl enable Cassandra

To edit and configure the Apache Cassandra configuration file, it may be necessary to make a backup of the current configuration script. Later, we’ll use the file to restore the default settings if you mess something up. up.

sudo cp /etc/cassandra/cassandra.yaml /etc/cassandra/cassandra.yaml.backup

You can then edit the script with your favorite script editing tool.

$ sudo vim /etc/cassandra/cassandra.yaml

Finally, to login to the Apache Cassandra database, run the following command; it will allow you to enter the Cassandra query language.

Install Cassandra on Fedora Workstation

Installing Apache Cassandra on a Fedora or other Red Hat based system requires Java services on both the server and the client. You can run the following command to get a comprehensive view of the Cassandra packages on your system.

Install Cassandra on Fedora

As the Apache foundation provides the official Cassandra repository for Linux, you can use the official DNF package installer command to install the Apache Cassandra tool on Fedora Linux.

Run the following DNF command with root access to install Apache Cassandra in your DENF-based Linux environments.

$ sudo dnf install cassandra cassandra-server

Add Firewall for Cassandra in Fedora

If your DNF-based system has an active firewall system, you can run the following commands to enable your firewall daemon to allow Cassandra applications.

sudo firewall-cmd –zone = public –add-port = 9081 / tcp –permanent

sudo firewall-cmd –zone = public –add-port = 9042 / tcp –permanent

sudo firewall-cmd –reload

If you are a former Cassandra user, you can run the following command in the shell to run system control commands to stop the Cassandra tool.

$ sudo systemctl stop cassandra

$ sudo rm -rf / var / lib / cassandra / data / system / *

Installing Apache Cassandra on Arch-based Linux

The CLI method of installing the Apache Cassandra tool on Arch and other Arch based systems requires the Snap daemon on the system. If you don’t have the Snap daemon installed on your system, follow this post for guidance on how to install and use Snap on the Linux machine.

Once you have the Snap system installed on the machine, you can now run the following Snap command to install the latest Apache Cassandra tool on your Arch Linux. Here, I used the Manjaro KDE desktop to demonstrate how to install Apache Cassandra on the Arch system.

sudo snap install cassandra –edge

Start using Apache Cassandra

When the installation is finished up, run the system control command given below to start and restart the Cassandra tool on the system.

$ sudo systemctl start cassandra

$ sudo systemctl restart Cassandra

The following Cassandra query language will help you create a new superuser on your system for Cassandra.

cqlsh> CREATE PAPER WITH PASSWORD = ”

AND SUPERUSER = true

AND LOGIN = true;

Final note

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