I have a setup with 6 cassandra nodes (1.2.18), using RandomPartition, not using vnodes -- this is a legacy cluster.

We went from 3 nodes to 6 in the last few days to add capacity. However, there appears to be an imbalance:

Datacenter: us-east
==========
Replicas: 2

Address Rack Status State Load Owns Token 113427455640312821154458202477256070484 x.x.x.73 1d Up Normal 154.64 GB 33.33% 85070591730234615865843651857942052863 x.x.x.251 1a Up Normal 62.26 GB 16.67% 28356863910078205288614550619314017621 x.x.x.238 1b Up Normal 243.7 GB 50.00% 56713727820156410577229101238628035242
x.x.x.25   1a          Up     Normal  169.3 GB        33.33%              210
x.x.x.162 1b Up Normal 118.24 GB 50.00% 141784319550391026443072753096570088105 x.x.x.208 1d Up Normal 226.85 GB 16.67% 113427455640312821154458202477256070484


What is the cause of this imbalance ? How can I rectify it ?

Regards,
Oleg


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