Rebalance a cassandra cluster

[Akshit Jain]

Suppose I have a cassandra cluster with the data that is skewed such that
one node have 40% more data than other nodes.Since while creating the
cassandra the tokens were distributed uniformly.
Now to make the data uniform I have to recalculate the tokens and assign
them to nodes in the cluster. Then run repair and cleanup.
The question is How to recalculate the tokens and assign them to
nodes(Keeping cost ,distance between nodes and data movement in mind).