Replacing a running node
Two methods for replacing a node with a new node, such as when updating to newer hardware or performing proactive maintenance.
Steps to replace a node with a new node, such as when updating to newer hardware or performing proactive maintenance.
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Only add new nodes to the cluster. A new node is a system that DataStax Enterprise has never started. The node must have absolutely NO PREVIOUS DATA in the data directory, saved_caches, commitlog, and hints. Adding nodes previously used for testing or that have been removed from another cluster, merges the older data into the cluster and may cause data loss or corruption. |
You can replace a running node in two ways:
- Adding a node and then decommissioning the old node
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Two methods for replacing a node with a new node, such as when updating to newer hardware or performing proactive maintenance.
- Replacing a running node
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Replace a node that is currently running without streaming the data twice.
