If a node in your Redis Enterprise Software 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 nodefailure

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.

    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 replaces the faulty node.

  5. If the new node has insufficient memory, you are prompted to add a different node - one with sufficient memory.

    • If there is a faulty node in the cluster to which you are adding a node,
    • RS enforces using the new node to replace the faulty one.
    • 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.