Installing the Apache Cassandra 3.0 on RHEL-based systems 

Install using Yum repositories on RHEL, CentOS, and Oracle Linux.

DataStax no longer provides the DataStax Community version of Apache Cassandra™ or the DataStax Distribution of Apache Cassandra. See DataStax support for Apache Cassandra.
To download and install open-source Cassandra, see Apache Cassandra™.