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PMDATRIVIAL(1)									   PMDATRIVIAL(1)

NAME
       pmdatrivial - trivial performance metrics domain agent (PMDA)

SYNOPSIS
       $PCP_PMDAS_DIR/trivial/pmdatrivial [-d domain] [-l logfile] [-U username]

DESCRIPTION
       pmdatrivial is the simplest possible Performance Metrics Domain Agent (PMDA) which exports
       a single performance metric, the time in seconds since the 1st of January, 1970.

       The trivial PMDA is shipped as source code and is designed to be an aid for PMDA  develop-
       ers.

       A brief description of the pmdatrivial command line options follows:

       -d   It is absolutely crucial that the performance metrics domain number specified here is
	    unique and consistent.  That is, domain should be different for every PMDA on the one
	    host, and the same domain number should be used for the same PMDA on all hosts.

       -l   Location of the log file.  By default, a log file named trivial.log is written in the
	    current directory of pmcd(1) when pmdatrivial is  started,	i.e.   $PCP_LOG_DIR/pmcd.
	    If	the log file cannot be created or is not writable, output is written to the stan-
	    dard error instead.

       -U   User account under which to run the agent.	The default  is  the  unprivileged  "pcp"
	    account  in  current  versions  of	PCP,  but in older versions the superuser account
	    ("root") was used by default.

INSTALLATION
       If you want access to the names, help text and values for the trivial performance metrics,
       do the following as root:

	    # cd $PCP_PMDAS_DIR/trivial
	    # ./Install

       If you want to undo the installation, do the following as root:

	    # cd $PCP_PMDAS_DIR/trivial
	    # ./Remove

       pmdatrivial is launched by pmcd(1) and should never be executed directly.  The Install and
       Remove scripts notify pmcd(1) when the agent is installed or removed.

FILES
       $PCP_PMCDCONF_PATH
		 command line options used to launch pmdatrivial
       $PCP_PMDAS_DIR/trivial/help
		 default help text file for the trivial metrics
       $PCP_PMDAS_DIR/trivial/Install
		 installation script for the pmdatrivial agent
       $PCP_PMDAS_DIR/trivial/Remove
		 undo installation script for the pmdatrivial agent
       $PCP_LOG_DIR/pmcd/trivial.log
		 default log file for error messages and other information from pmdatrivial

PCP ENVIRONMENT
       Environment variables with the prefix PCP_ are used to parameterize the file and directory
       names used by PCP.  On each installation, the file /etc/pcp.conf contains the local values
       for these variables.  The $PCP_CONF variable may be used to specify an alternative config-
       uration file, as described in pcp.conf(5).

SEE ALSO
       PCPIntro(1), pmcd(1), pmdasample(1), pmdasimple(1), pmdatxmon(1) and PMDA(3).

Performance Co-Pilot			       PCP				   PMDATRIVIAL(1)
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