Data Repository Prerequisites Checks Failed

Products

• CA Infrastructure Management
• CA Performance Management - Usage and Administration
• DX NetOps

Issue/Introduction

During upgrade of Data Repository the prerequisite checks failed.  We can see from the install log (install_log_install_09-26-2020_03-43-48): 

Prerequisites not fully met during local (OS) configuration for
verify-<IP ADDRESS>.xml:
    HINT (S0305): https://my.vertica.com/docs/9.1.x/HTML/index.htm#cshid=S0305
        TZ is unset for dradmin. Consider updating .profile or .bashrc

Prerequisites not fully met during local (OS) configuration for
verify-<IP ADDRESS>.xml:
    HINT (S0305): https://my.vertica.com/docs/9.1.x/HTML/index.htm#cshid=S0305
        TZ is unset for dradmin. Consider updating .profile or .bashrc
    FAIL (S0020): https://my.vertica.com/docs/9.1.x/HTML/index.htm#cshid=S0020
        Readahead size of  (/dev/mapper/mpathh) is too low for typical systems:
        256 < 2048

Prerequisites not fully met during local (OS) configuration for
verify-<IP ADDRESS>.xml:
    HINT (S0305): https://my.vertica.com/docs/9.1.x/HTML/index.htm#cshid=S0305
        TZ is unset for dradmin. Consider updating .profile or .bashrc

Detected significant differences in the cluster:
    HINT: Differences in RAM (kbytes):
        verify-<IP ADDRESS>.xml: 263876004
        verify-<IP ADDRESS>.xml: 263876008
        verify-<IP ADDRESS>.xml: 263876096
    For more information, see
    https://my.vertica.com/docs/9.1.x/HTML/index.htm#cshid=CLREQ01

System prerequisites failed.  Threshold = FAIL
 Hint: Fix above failures or use --failure-threshold

Environment

Dx NetOps Performance Management

Cause

FAIL (S0020): https://my.vertica.com/docs/9.1.x/HTML/index.htm#cshid=S0020
        Readahead size of  (/dev/mapper/mpathh) is too low for typical systems:
        256 < 2048

Resolution

After the changes were made as per the Vertica link below, the second installation attempt during the prereq checks passed.  The Vertica installation was successful.

https://my.vertica.com/docs/9.1.x/HTML/index.htm#cshid=S0020

Additional Information

As pointed out this is an upgrade from previous version.  The Vertica setting was probably an optional.  Now going forward this is mandatory.