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    Removing Data Nodes from an Active SSR Cluster

    Note: This procedure makes the following assumptions:

    • You are working with an active cluster and the SSR database is in production mode. If you are unsure what mode the database is in, see Viewing the SSR Database Mode (SRC CLI).
    • Your cluster currently contains four data nodes and you want to change to a two-data-node cluster. Data nodes can be added or removed only in pairs.

    Caution: Changing the SSR cluster geometry (adding or removing data nodes) destroys all data in the SSR database. All data is lost. This procedure should be performed only during a maintenance window. Review this procedure in full before proceeding.

    To remove two data nodes from an active cluster:

    1. Reconfigure the cluster topology to a two-data-node geometry.

      See Configuring the SSR Cluster Geometry (SRC CLI).

    2. Commit the configuration.

      See Committing a Configuration and Exiting Configuration Mode.

    3. Place the database into maintenance mode.

      See Placing the SSR Database into Maintenance Mode (SRC CLI).

    4. Disable the component database on all management servers in the cluster (one by one).

      See Disabling the SSR Database (SRC CLI).

    5. Disable the component database on the two data nodes you removed from the cluster (one by one).

      See Disabling the SSR Database (SRC CLI).

    6. Enable the component database on all management servers in the cluster (one by one).

      See Enabling the SSR Database (SRC CLI).

    7. Restart the component database on the two remaining data nodes in the cluster (one by one).

      See Restarting the SSR Database (SRC CLI).

    8. Re-create the SSR database.

      See Creating the SSR Database (SRC CLI).

    9. Restart all SSR client components.

      See Enabling SRC Components

    10. Verify the cluster configuration changes by viewing the status of the database.

      See Viewing the Status of the SSR Cluster (SRC CLI).

    11. Place the database into production mode.

      See Placing the SSR Database into Production Mode (SRC CLI).

    Modified: 2016-12-29

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