\*(ia performance metrics domain agent (pmda)
$PCP_PMDAS_DIR/pmda\*(ia [-d domain] [-i port] [-l logfile] [-p] [-u socket] [-U username]
pmda\*(ia is a \*(ia 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 \*(ia 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 pmda\*(ia 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 pmda\*(ia 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 \*(ia.log is written in the current directory of pmcd(1) when pmda\*(ia 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 pmda\*(ia is via standard input and standard output. This is the default connection mode.
-u
Expect PMCD to connect to pmda\*(ia 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.
If you want access to the names, help text and values for the \*(ia performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/\*(ia # ./Install
Note that the installation script also installs the DSO version of the \*(ia 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/\*(ia # ./Remove
pmda\*(ia 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.
$PCP_PMCDCONF_PATH
command line options used to launch pmda\*(ia
$PCP_PMDAS_DIR/\*(ia/help
default help text file for the \*(ia metrics
$PCP_PMDAS_DIR/\*(ia/Install
installation script for the pmda\*(ia agent
$PCP_PMDAS_DIR/\*(ia/Remove
undo installation script for the pmda\*(ia agent
$PCP_LOG_DIR/pmcd/sample.log
default log file for error messages and other information from pmda\*(ia
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 configuration file, as described in pcp.conf(5).