We have 06 node existing DSE 5.1.11 cluster with AWS EC2 C5.4xlarge .Now business is asking us to add 09 new AWS EC2 I3.2xlarge to existing cluster and decomm all old of nodes C5.4xlarge .
Question is :-
1) Currently cluster is running with "num_tokens: 256" on all EC2 C5.4xlarge , when I am adding new nodes of type I3.2xlarge to the cluster can I set "num_tokens: 8" ? only on I3.2xlarge.
2) Can cluster run with different set of nodes running different set of "num_tokens:xxx" for short duration ?. After few days we consider to decomm all old nodes of type C5.4xlarge