Apache Cassandra is a free, open source NoSQL database with no single point of failure. It offers linear scalability and high availability without compromising on performance. Apache Cassandra is used by many companies that have large, active data sets, including Reddit, NetFlix, Instagram, and Github.
This article will walk you through installing Apache Cassandra on Ubuntu 20.04.
Installing Apache Cassandra on Ubuntu is straightforward. We install Java, activate the Apache Cassandra repository, import the repository GPG key and install the Apache Cassandra server.
At the time of this writing, the latest version of Apache is Cassandra
3.11 and requires OpenJDK 8 to be installed on the system.
Run the following command as root or user with sudo privileges to install OpenJDK:
sudo apt update
sudo apt install openjdk-8-jdk
Check the Java installation by printing the Java version:
The output should look something like this:
openjdk version "1.8.0_265" OpenJDK Runtime Environment (build 1.8.0_265-8u265-b01-0ubuntu2~20.04-b01) OpenJDK 64-Bit Server VM (build 25.265-b01, mixed mode)
Install Apache Cassandra
Install the dependencies required to add a new repository over HTTPS:
sudo apt install apt-transport-https
Import the GPG key of the repository and add the Cassandra repository to the system:
wget -q -O - https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add -
sudo sh -c 'echo "deb https://www.apache.org/dist/cassandra/debian 311x main" > /etc/apt/sources.list.d/cassandra.list'
Once the repository is enabled, update the package list and install the latest version of Apache Cassandra:
sudo apt update
sudo apt install cassandra
The Apache Cassandra service will start automatically after the installation process is complete. You can check it out by typing:
You should see something like this:
Datacenter: datacenter1 ======================= Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns (effective) Host ID Rack UN 127.0.0.1 70 KiB 256 100.0% 2eaab399-be32-49c8-80d1-780dcbab694f rack1
That’s it. At this point, you have Apache Cassandra installed on your Ubuntu server.
Configuring Apache Cassandra
Apache Cassandra data is stored in
/var/lib/cassandra Directory, configuration files are in
/etc/cassandra, and Java startup options can be found in
By default, Cassandra is configured to only listen on localhost. If the client that connects to the database is also running on the same host, you do not need to change the default configuration file.
To interact with Cassandra through CQL (the Cassandra Query Language), you can use a command line tool called. use
cqlsh which comes with the Cassandra package.
Connected to Test Cluster at 127.0.0.1:9042. [cqlsh 5.0.1 | Cassandra 3.11.7 | CQL spec 3.4.4 | Native protocol v4] Use HELP for help. cqlsh>
Rename the Apache Cassandra cluster
The standard Cassandra cluster is called the “test cluster”. If you want to change the cluster name, do the following:
Sign up with. at the Cassandra CQL terminal
Run the following command to change the cluster name to Linuxize Cluster:
UPDATE system.local SET cluster_name = 'Linuxize Cluster' WHERE KEY = 'local';
Change “Linuxize Cluster” with your desired name.
When you’re done, type
exitto exit the console.
cassandra.yamlConfiguration file and enter your new cluster name./etc/cassandra/cassandra.yaml
cluster_name: 'Linuxize Cluster'
Save and close the file.
Clear the system cache:
nodetool flush system
Restart the Cassandra service:
sudo systemctl restart cassandra
We showed you how to install Apache Cassandra on Ubuntu 20.04. You can now visit the official Apache Cassandra Documentation
Page and learn how to get started with Cassandra.
If you run into any problem or have any feedback, please leave a comment below.