Upgrading high availability installations

All servers that are configured for the HA feature must be on the same version. Thus, all servers must be upgraded at the same time.

Procedure

  1. Download and uncompress the installation package.  Upgrades are done with the same package used to perform new installations.
  2. Shut down the servers. As usual, make sure that the servers are stopped before you begin the upgrade.
  3. Run the server installation script.
  4. When prompted for the location of the installation directory, enter the path to one of the servers. By specifying an existing installation, you are asked if you want to upgrade the current installation. If you answer yes, the script leads you through the required steps.
    Note: Note: upgrading the first server is sufficient even when you are using multiple data centers.
  5. When the script prompts you to upgrade the database, answer yes for only the first server. When running a database-only upgrade, the script ensures that the update is performed only once.
  6. Restart the upgraded server. Always use service scripts to start or stop the server.
  7. After the first server is back online, upgrade the other servers, taking care to skip the database upgrade step.

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