PMDASAMPLE(1)						      General Commands Manual						     PMDASAMPLE(1)

NAME

       pmdasample - sample performance metrics domain agent (PMDA)

SYNOPSIS

       $PCP_PMDAS_DIR/pmdasample [-d domain] [-i port] [-l logfile] [-p] [-u socket] [-U username]

DESCRIPTION

       pmdasample is a sample Performance Metrics Domain Agent (PMDA) which exports a variety of synthetic performance metrics.

       This  PMDA  was developed as part of the quality assurance testing for the PCP product, but has other uses, most notably in the development
       of new PCP clients.

       The metrics exported by the sample PMDA cover the full range of data types, data semantics, value cardinality,  instance  domain  stability
       and error conditions found in real PMDAs.

       A brief description of the pmdasample 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.

       -i   Expect PMCD to connect to pmdasample on the specified TCP/IP port.	port may be a port number or port name.

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

       -p   Expect PMCD to create a pipe and the connection to pmdasample is via standard input and standard output.  This is the default  connec-
	    tion mode.

       -u   Expect PMCD to connect to pmdasample on the Unix domain socket named socket.

       -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.

       At most one of the options -i, -p and -u may be specified.

INSTALLATION

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

	    # cd $PCP_PMDAS_DIR/sample
	    # ./Install

       Note that the installation script also installs the DSO version of the sample PMDA, so there are in fact two PMDAs installed, and two  sets
       of performance metrics, namely sample.*	and sampledso.*.

       If you want to undo the installation (and remove both PMDAs), do the following as root:

	    # cd $PCP_PMDAS_DIR/sample
	    # ./Remove

       pmdasample  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 pmdasample
       $PCP_PMDAS_DIR/sample/help
		 default help text file for the sample metrics
       $PCP_PMDAS_DIR/sample/Install
		 installation script for the pmdasample agent
       $PCP_PMDAS_DIR/sample/Remove
		 undo installation script for the pmdasample agent
       $PCP_LOG_DIR/pmcd/sample.log
		 default log file for error messages and other information from pmdasample

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 configura-
       tion file, as described in pcp.conf(5).

SEE ALSO

       PCPIntro(1), pmcd(1), pmdasimple(1), pmdatrivial(1), pmdatxmon(1), pcp.conf(5) and pcp.env(5).

Performance Co-Pilot							PCP							     PMDASAMPLE(1)