Knowledgebase

Introduction

Apache Cassandra is an open-source NoSQL distributed database engine. NoSQL database engines store data as key-value pairs, and Apache Cassandra comes with Cassandra Query Language (CQL) for retrieving the data. It can handle large amounts of data while ensuring availability and consistency. It supports single-node replication and multi-location replication for redundancy, no single point of failure, and disaster recovery. It runs several nodes within a cluster, where each single node can receive and process a complete request without communication to the master node.

This article explains how to install Apache Cassandra on Debian 11.0 server.

Prerequisites

Perform the following steps first:

• Deploy a Rcs Debian 11.0 Server.
• Connect to the server with SSH.
• Update the server.
• Create a non-root user with sudo access.

1. Install Java

For Apache Casandra to run, you need Java installed in your server. Install Java.

$ sudo apt install openjdk-11-jdk -y

Check the Java version installed.

$ java -version

2. Configure Apache Cassandra Repository

Install the required dependencies.

$ sudo apt install apt-transport-https gnupg2 -y

Download and add the Apache Cassandra GPG key.

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

Add the downloaded repository.

$ sudo sh -c 'echo "deb https://downloads.apache.org/cassandra/debian 40x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list'

3. Install Apache Cassandra

Update the system.

$ sudo apt update

Install Apache Cassandra.

$ sudo apt install cassandra -y

Enable Apache Cassandra to start on system boot.

$ sudo systemctl enable cassandra

Check the status of the Apache Cassandra service.

$ sudo systemctl status cassandra

Check the status of your cluster. You might need to wait for a couple of seconds for all nodes in the cluster to finish starting up.

$ sudo nodetool status

4. Configure Apache Cassandra

Log in with the cqlsh command-line tool to interact with Cassandra cluster.

$ cqlsh

When finished, exit the prompt.

EXIT;

Conclusion

You have installed Apache Cassandra on Debian 11.0 server. You can check the official documentation to learn more about using and managing the database server.