How to fix HP Vertica Installation FAILED with errors

Some times when we install HP Vertica database we get errors telling us that we cannot finish the installation because of some failed prerequisites. The error messages are something like this : 

Prerequisites not fully met during local (OS) configuration for
verify-127.0.0.1.xml:
    HINT (S0151): https://my.vertica.com/docs/7.1.x/HTML/index.htm#cshid=S0151
        These disks do not have known IO schedulers: '/dev/mapper/vg_test-
        lv_root' ('') = ''
    HINT (S0305): https://my.vertica.com/docs/7.1.x/HTML/index.htm#cshid=S0305
        TZ is unset for dbadmin. Consider updating .profile or .bashrc
    HINT (S0041): https://my.vertica.com/docs/7.1.x/HTML/index.htm#cshid=S0041
        Could not find the following tools normally provided by the mcelog
        package: mcelog
    HINT (S0040): https://my.vertica.com/docs/7.1.x/HTML/index.htm#cshid=S0040
        Could not find the following tools normally provided by the pstack or
        gstack package: pstack/gstack
    HINT (S0045): https://my.vertica.com/docs/7.1.x/HTML/index.htm#cshid=S0045
        Could not find the following tools normally provided by the sysstat
        package: mpstat, iostat
    WARN (S0170): https://my.vertica.com/docs/7.1.x/HTML/index.htm#cshid=S0170
        lvscan (LVM utility) indicates some active volumes.
We can finalize the installation even with this Warning, as our Vertica Installation will not be influenced by them. Of course that is recommended that the installation should fulfill all the prerequisites as per HP Vertica requirements, but in some cases we can skip them.
  • So in order to skip some worning or hints we can use the --failure-threshold option:
This option comes with the install_vertica utility. Options: 
--failure-threshold {HINT,WARN,FAIL,HALT,NONE}
So to finilaze the Vertica Installation when we get HINTS & WARNINGS. 
[root@primary block]# /opt/vertica/sbin/install_vertica --hosts localhost --failure-threshold NONE

...
...
...
 Completing installation...

Running upgrade logic
No spread upgrade required: /opt/vertica/config/vspread.conf not found on any node
Installation complete.

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