General Hardware and OS Requirements and Recommendations
Hardware Recommendations
The Vertica Analytics Platform is based on a massively parallel processing (MPP), shared-nothing architecture, in which the query processing workload is divided among all nodes of the Vertica database. OpenText highly recommends using a homogeneous hardware configuration for your Vertica cluster; that is, each node of the cluster should be similar in CPU, clock speed, number of cores, memory, and operating system version.
Note that OpenText has not tested Vertica on clusters made up of nodes with disparate hardware specifications. While it is expected that a Vertica database would functionally work in a mixed hardware configuration, performance will most certainly be limited to that of the slowest node in the cluster.
Detailed hardware recommendations are available in Recommendations for Sizing Vertica Nodes and Clusters (formerly the Vertica Hardware Planning Guide).
Platform OS Requirements
Deploy Vertica as the only active process on each host—other than Linux processes or software explicitly approved by Vertica. Vertica cannot be colocated with other software. Remove or disable all non-essential applications from cluster hosts.
You must verify that your servers meet the platform requirements described in Vertica Server and Vertica Management Console.
Verify Sudo
Vertica uses the sudo command during installation and some administrative tasks. Ensure that sudo is available on all hosts with the following command:
# which sudo /usr/bin/sudo
If sudo is not installed, on all hosts, follow the instructions in How to Enable sudo on Red Hat Enterprise Linux.
When you use sudo to install Vertica, the user that performs the installation must have privileges on all nodes in the cluster.
Configuring sudo with privileges for the individual commands can be a tedious and error-prone process; thus, the Vertica documentation does not include every possible sudo command that you can include in the sudoers file. Instead, Vertica recommends that you temporarily elevate the sudo user to have all privileges for the duration of the install.
See the sudoers and visudo man pages for the details on how to write/modify a sudoers file.
To allow root sudo access on all commands as any user on any machine, use visudo as root to edit the /etc/sudoers file and add this line:
## Allow root to run any commands anywhere root ALL=(ALL) ALL
After the installation completes, remove (or reset) sudo privileges to the pre-installation settings.