This parameter is required on multi-node installations.
On single-node installations the parameter is optional and the default is localhost.
If you plan to expand to additional hosts later, then you must use the -s parameter. Installations done without the -s parameter cannot be upgraded to a multiple-node deployment, and must be re installed to support additional nodes.
Note: If you are upgrading an existing installation of HP Vertica, specify one hostname, and HP Vertica finds the rest of the nodes.
You can get guidelines how to install vertica & add hosts on below links:
1. Prerequisites for hosts before installing vertica:
Comments
It depends if how you have installed vertica at first. You can add nodes to single node cluster if you have done installation using -s option.
# /opt/vertica/sbin/install_vertica -s host_list -r rpm_package -u dba_username
-s host_list
============
A comma-separated list of hostnames or IP addresses to include in the cluster; do not include space characters in the list.
Examples:
-s host01,host02,host03
-s 192.168.233.101,192.168.233.102,192.168.233.103
This parameter is required on multi-node installations.
On single-node installations the parameter is optional and the default is localhost.
If you plan to expand to additional hosts later, then you must use the -s parameter. Installations done without the -s parameter cannot
be upgraded to a multiple-node deployment, and must be re installed to support additional nodes.
Note: If you are upgrading an existing installation of HP Vertica, specify one hostname, and HP Vertica finds the rest of the nodes.
You can get guidelines how to install vertica & add hosts on below links:
1. Prerequisites for hosts before installing vertica:
https://my.vertica.com/docs/6.1.x/HTML/index.htm#3064.htm
2. Adding hosts to Vertica cluster of single node.
https://my.vertica.com/docs/6.1.x/HTML/index.htm#10265.htm
Regards'
Abhishek