Tarball installation directories 

Configuration files directory locations.

The configuration files are located in the following directories:

Configuration Files Locations
cassandra.yaml install_location/conf
cassandra-topology.properties install_location/conf
cassandra-rackdc.properties install_location/conf
cassandra-env.sh install_location/conf
cassandra.in.sh install_location/bin

The binary tarball releases install into the installation directory.

Directories Description
data Files for commitlog, data, and saved_caches (unless set in cassandra.yaml)
bin Utilities and start scripts
conf Configuration files and environment settings
interface Thrift and Avro client APIs
javadoc Cassandra Java API documentation
lib JAR and license files
tools Cassandra tools and sample cassandra.yaml files for stress testing.

For DataStax Enterprise installs, see the documentation for your DataStax Enterprise version.