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Installing › How to Convert from Conventional to Advanced Availability Configuration

How to Convert from Conventional to Advanced Availability Configuration

Before you convert from the conventional to the advanced availability configuration, ensure that you have upgraded to or already have installed CA SDM r12.9 on all the servers.

The following diagram shows how to convert from conventional to advanced availability configuration:

This diagram shows how to convert from convetional to advanced availability configuration.

Follow these steps:

  1. Plan for the Advanced Availability Configuration. For more information, see the planning scenario or the Implementation Guide.
  2. Stop all services on the secondary servers.
  3. Inactivate All the Secondary Servers.
  4. Configure the Background Server.
  5. Change Secondary Server Type.
  6. Configure the Standby or Application Server.
  7. Verify Server Details.

Inactivate All the Secondary Servers

Before you configure the servers for the advanced availability configuration, ensure that you inactivate all the secondary servers.

Follow these steps:

  1. Log in to the web UI of the primary server.
  2. Select System, Servers on the Administration tab.

    The Server List page opens.

  3. Click the host name of the secondary server.

    The Server Detail page opens.

  4. Click Edit.
  5. Change the Record status to Inactive.

    Important! If you have inactivated any server, it is recommended not to start CA SDM services on that server. This action may result in unexpected behaviour.

  6. Click Save.

    The secondary server is set to inactive.

  7. Perform steps 3-6 for all the other secondary servers.

    All secondary servers are set to inactive.

Configure the Background Server

Configure the background server before configuring the application or standby servers.

Follow these steps:

  1. Log in to the primary server.
  2. Use the pdm_configure command to start the configuration.

    The Select Server Configuration screen opens.

  3. Select Advanced Availability as the configuration type and follow the prompts to complete the configuration. For more information, see the Server Configuration Help.

    The background server is configured.

Change Secondary Server Type

After you configure the background server, change the server type for all the secondary servers to application and standby servers and activate them.

Follow these steps:

  1. Make sure that the background server is running.
  2. Log in to the web UI of the background server.
  3. Select System, Servers on the Administration tab.

    The Server List page opens.

  4. Set the Record Status for all secondary servers as Active.
  5. Change the server type of all the secondary servers to application or standby servers, as required.

    The server type of all the secondary servers is changed.

Configure the Standby and Application Servers

You configure each standby and application server after configuring the background server. This configuration is required to establish communication with the background server.

Important! (Recommended) Ensure that both background server and all other standby servers have similar configuration. This process ensures that during a failover when a standby server becomes the new background server, it can function exactly like the old background server.

Follow these steps:

  1. Log in to a secondary server.
  2. Use the pdm_configure command to start the configuration.

    The Select Server Configuration screen opens.

  3. Select Advanced Availability as the configuration type and follow the prompts to complete the configuration. For more information, see the Server Configuration Help.
  4. Repeat steps 1-3 on each of the servers that you want to configure as the standby and application server.

    You have configured the standby and application servers.

  5. If you have one or more application servers and you want to use a load balancer to track the requests to and from the different application servers, configure the load balancer.

    Note: To use a load balancer URL or an application server URL for the links in the CA SDM notifications, complete the following steps:

    1. Log in to the background server.
    2. Select Options Manager, Notifications on the Administration tab.
    3. Change the value of the web_cgi_url option to point to:
      • The load balancer if you have more than one application servers.
      • The application server, if you have only one application server.
  6. Verify the Server Details.