Redis Enterprise Software - Operations and Administration Guide

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Replacing a node

If a node in your cluster is faulty, its status appears as Down in the Status column of the Nodes page, and in the Cluster > Configuration page.

Example of a node failure

To replace a faulty node:

  1. Acquire a new node that is identical to the old node, install and configure Redis Enterprise Software on it per the install instructions.

    Note: If you are using Redis on Flash, you must make sure the required flash storage is set up on this new node.

  2. Add a new node, as described in adding a new node to a cluster.
  3. Make sure the new node has as much available memory as the faulty node.
  4. A message appears, informing you that the cluster has a faulty node and that the new node will replace the faulty node.
  5. If the new node has insufficient memory, you are prompted to add a different node – one with sufficient memory.

Note: If there is a faulty node in the cluster to which you are adding a node, RP will enforce using the new node to replace the faulty one.


Note: If you are using the DNS NS record based connection approach, the DNS records must be updated each time a node is added or replaced. For additional details, For more information, refer to the connection management page.