Enabling virtual nodes on a new cluster

Steps and recommendations for enabling virtual nodes (vnodes) on a new cluster.

Generally when all nodes have equal hardware capability, they should have the same number of virtual nodes (vnodes). If the hardware capabilities vary among the nodes in your cluster, assign a proportional number of vnodes to the larger machines.

Note: DataStax recommends using 8 vnodes (tokens). Using 8 vnodes distributes the workload between systems with a ~10% variance and has minimal impact on performance.
The location of the cassandra.yaml file depends on the type of installation:
Package installations /etc/cassandra/cassandra.yaml
Tarball installations install_location/resources/cassandra/conf/cassandra.yaml


Set the number of tokens on each node in your cluster with the num_tokens parameter in the cassandra.yaml file.