Replacing a Host Using the Same Name and IP Address

If a host of an existing Vertica database is removed you can replace it while the database is running.

Remember a host in Vertica consists of the hardware and operating system on which Vertica software resides, as well as the same network configurations.

You can replace the host with a new host that has the following same characteristics as the old host:

  • Name
  • IP address
  • Operating system
  • The OS administrator user
  • Directory location

Replacing the host while your database is running prevents system downtime. Before replacing a host, backup your database. See Backing Up and Restoring the Database for more information.

Replace a host using the same characteristics as follows:

  1. Run install_vertica from a functioning host using the --rpm or --deb parameter:
    $ /opt/vertica/sbin/install_vertica --rpm <rpm_package>

    For more information see Installing Vertica.

  1. Use Administration Tools from an existing node to restart the new host. See Restart Vertica on a Node.

The node automatically joins the database and recovers its data by querying the other nodes in the database. It then transitions to an UP state.