HP XC System Software Administration Guide Version 3.1

• Processors
• MAC addresses
• IP addresses
• Switch ports
• Services
• Roles
• Metrics
The following custom management tools access the data stored in the CMDB:
• The shownode command searches the database and displays a list of services defined for a given
parameter.
• The dbsysparams command searches the database and displays the value of the given attribute.
• The managedb command enables you to archive metrics data from the CMDB, back it up, and dump
(display) the CMDB data.
Additionally, you can interrogate the CMDB and modify parameters.
Although it is possible to access the CMDB with mysql, the MySQL interactive client, this practice is
discouraged.
Chapter 6: Managing the Configuration and Management Database (page 77) describes the tasks that are
performed in conjunction with the CMDB.
1.5 HP XC Configuration File Guidelines
Configuration files tune the structure and the operation of the HP XC System Software. Some of these files
configure Linux; some configure a third-party application, such as SLURM or Nagios; and some apply
specifically to the HP XC System Software.
While you can modify some configuration files to solve a site-specific issue, do not change other
configuration files so that the integrity of the HP XC System Software is maintained.
Typically, configuration files are modified during reconfiguration, that is, when the cluster_config
utility is run, or during an rpm upgrade operation.
This section describes how modifications to configuration files are treated during reconfiguration and
upgrade operations.
1.5.1 Linux Configuration Files
Linux configuration files pertain to the configuration of the operating system.
Reconfiguration
For a system reconfiguration, the policy in effect is to preserve any customizing you have done to a Linux
configuration file unless the change undermines the proper operation of the HP XC System Software. In
that case, the HP XC System Software overwrites the configuration file and the changes you made are
deleted.
Some configuration parameters can be expressed in terms of a range. If you make a change to such a
parameter and that change is within the operational range required by the HP XC System Software, the
change to the configuration file is preserved. If the change is not within that range, the HP XC configuration
application modifies the configuration file to adhere to the specified range.
An example of a modification to a Linux configuration files that will not be preserved is any of the scripts
in the /etc/sysconfig/network-scripts directory. An nconfigure script determines the device
names to associate with the admin, internal, and external devices; any customization made to the
device name configuration files are overwritten.
Additions made to the Linux configuration files that are not fundamental to proper HP XC system operation
are preserved during reconfiguration.
1.5 HP XC Configuration File Guidelines 35