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.

Note

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:

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 Install Vertica using the command line.
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.