Reduce the size of a data center.
Use these instructions when you want to remove nodes to reduce the size of your
cluster, not for replacing a dead node.
. Attention: If you are not using
virtual nodes (vnodes),
you must rebalance the cluster.
Procedure
-
Check whether the node is up or down using nodetool
status:
The nodetool command shows the status of the node (UN=up,
DN=down):
-
If the node is up, run nodetool
decommission.
This assigns the ranges that the node was responsible for to other nodes and
replicates the data appropriately.
Use nodetool netstats to monitor the
progress.
-
If the node is down: