# Installing the CommServe Failover Package on the Production CommServe Host

If you already have a CommServe server that you want to use as the production CommServe host, then you must install only the CommServe Failover package.

## Before You Begin

- Ensure that the CommServe server is installed.

- Download the Commvault software installation packages. For more information on how to download the software, see Download the Commvault Software.

- Make sure that the bAllowMultiInstances registry key does not exist in the CommServe server. You can verify whether the key exists using the Windows Registry Editor in the HKEY_LOCAL_MACHINE\SOFTWARE\GalaxyInstallerFlags\ bAllowMultiInstances folder. (Make sure to delete the key if it exists.)

## Procedure

1. Log on to the computer as an Administrator or as a member of the Administrator group on that computer.

2. Launch theCommvault software installation package.

   The Download Manager dialog box is displayed.

3. Click Extract.

   The Language Selection page is displayed.

4. Select the language from the Please Choose a Language list, and then click the arrow to proceed.

   The Welcome page is displayed.

5. Select the I Agree check box, and then click the arrow to proceed.

   The Choose the Installation Type page is displayed.

6. Click Install packages on this computer, and then click the arrow to proceed.

   The Install Option page is displayed.

7. Click Install CommServe Failover, and then click the arrow to proceed.

   Note

   When you select this option, a new instance (second instance) is automatically created and the SQL Server agent and the CommServe Failover package are installed in this new instance. (No additional user intervention is needed.)

   The Select Maintenance Release page is displayed.

8. Select the same hotfix option that you selected during the installation of the production CommServe host, and then click the arrow to proceed.

   The Installation Path page is displayed.

   Note

   It is important to install the same hotfixes for all packages in the production and standby CommServe hosts.

9. Verify the path for the SQL client, and then click the arrow to proceed.

   The Installation Summary page is displayed.

10. Verify the list of packages, and then click the arrow to proceed.

    The software installs the binaries for setting up the SQL client. This process may take a few minutes.

    The Client Computer Information page is displayed.

11. Verify/modify the names and then click the arrow to proceed.

    - Client Name is the name of the SQL client that will be displayed in user interfaces like Command Center / CommCell Console.

    - Host Name is the physical name (FQDN) of the server.

    The Client Name and Host Name prompts are for the SQL client in the production CommServe host. (This is the standalone SQL agent installed in Instance002 which is used for backing up the SQL database from the production CommServe host.)

    Tip

    Choose a meaningful Client Name to clearly differentiate this client in the user interfaces like Command Center / CommCell Console. For example, you can add the word SQL to differentiate it from the CommServe client.

    The Server Information page is displayed.

12. Select/enter the following information and then click the arrow to proceed:

    - Type the Fully Qualified Domain Name (FQDN) of the production CommServe host.

      This is the name that you noted while installing the production CommServe host.

    - Select CommServe will connect to this computer to finish registration if the CommServe computer must initiate communications with the client.

      For more information about configuring direct connections from the CommServe computer, see Configuring Direct Connections from the CommServe Computer to the Client.

    - Select Post Quantum Cryptography (PQC) mode enabled on Commserve if PQC is enabled on the CommServe server. PQC encrypts and decrypts data to protect it from attacks by quantum computers.

      Note

      - Post-quantum cryptography can be configured only at the CommCell level.

      - For information about enabling PQC, see Enabling Post Quantum Cryptography.

    The Client Certificate page is displayed.

13. If a certificate is available, type the name with the full path to the certificate file and proceed to the next page.

    The Server Authentication page is displayed.

14. Select an authentication method for accessing the production CommServe host, and then click the arrow to proceed.

    These are the account details that you noted while installing the production CommServe host.

    The software installs the binaries for setting up the SQL client. This process may take a few minutes.

    A message similar to the following is displayed:

Click Finish to complete the installation.

## Result

A new instance (second instance) is created and the SQL Server Agent and the CommServe Failover Package are installed in this new instance. The new instance is displayed as a separate server in the Command Center.

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