Replacing a running node
Steps to replace a node with a new node, such as when updating to newer hardware or performing proactive maintenance.
You must prepare and start the replacement node, integrate it into the cluster, and then decommision the old node.
Prepare and start the replacement node, as described in Adding nodes to an
Note: If not using vnodes, see Adding Capacity to an Existing Cluster in the Cassandra 1.1 documentation.
Confirm that the replacement node is alive:
The status should show:
- nodetool ring: Up
- nodetool status: UN
- Note the Host ID of the node; it is used in the next step.
- Using the Host ID of the original node, decommission the original node from the cluster using the nodetool decommission command.