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Stopping and Starting a Node

A node can be shut down temporarily for maintenance or to address hardware or other issues on the node.

Before You Begin

Login to Command Center and verify that the disks and storage pool are online and functioning properly .

  • To verify the Storage Pool:
    1. From the navigation pane, click Storage > HyperScale.

      The HyperScale page appears.

    2. Verify that the Status of the storage pool is displayed as Online.
  • To verify the Disks:
    1. In the HyperScale page, click the name of the <Storage pool>.

      The <Storage pool> page appears.

    2. Verify that the Status of the Nodes ia displayed as Online.
    3. Click each node and verify that the Disk Status is displayed as Ready.

Procedure

  1. If the CommServe is installed in the node, migrate the node using the oVirt Virtualization Manager.

    For step-by-step instructions, see Failover of Nodes.

  2. From the Command Center, set the MediaAgent on maintenance mode.

    For step-by-step instructions, see Setting the MediaAgent on Maintenance Mode.

  3. Using an SSH client program, like PuTTy on Windows, login to the node as root and run the following command to stop services:

    commvault stop

  4. When the services are stopped, type the following command to view the deduplication processes that may be running.

    commvault list

    If the SIDB_Engine_<ID> process is found running, wait until the process is complete.

    Note: Depending on the size of the DDB, this process might take as long as 30 minutes to complete.

    Repeat this step to confirm that the processes are no longer running before restarting the computer.

  5. Shut down the node to perform the necessary maintenance.

    Tip: Use the reboot or shutdown –h now commands to stop the node.

  6. Once the maintenance is complete and the node is restarted, perform the following steps:
    • Open the Command Center and make sure that the Storage Pool and Disks are online and functioning properly as described in Before You Begin.
    • Disable the maintenance mode for the MediaAgent to bring it online.

      For step-by-step instructions, see Setting the MediaAgent on Maintenance Mode.

Last modified: 1/9/2019 8:58:45 PM