CentOS 7.0 - man page for pmdashping (centos section 1)

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PMDASHPING(1)									    PMDASHPING(1)

NAME
       pmdashping - "shell-ping" performance metrics domain agent

SYNOPSIS
       $PCP_PMDAS_DIR/shping/pmdashping  [-C] [-d domain] [-l logfile] [-I interval] [-t timeout]
       [-U username] configfile

DESCRIPTION
       pmdashping is a Performance Metrics Domain Agent (PMDA) which exports quality  of  service
       and response time measurements for arbitrary commands as might be run from a shell such as
       sh(1).

       These measurements are intended to be used to quantify service quality and service  avail-
       ability	for those services that are either mission critical or act as early indicators of
       adverse system performance.

       The sample configuration monitors simple shell commands (exit and date(1)), a short compu-
       tationally intensive task using sum(1), a short C compilation, DNS lookup via nslookup(1),
       YP lookup via ypcat(1), bind/portmapper service using rpcbind(1), SMTP  by  connecting  to
       telnet port 25 and sending an ``expn root'' request, and NNTP by connecting to telnet port
       119 and running a ``listgroup'' command.

       It is expected that other commands would follow the examples in the  sample  configuration
       file, and most deployments of the pmdashping PMDA are expected to use a customized config-
       uration file.

       A brief description of the pmdashping command line options follows:

       -C   Parse configfile, reporting any errors and exiting with non-zero status if	the  file
	    contains syntactical errors.

       -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 shping.log is written in the
	    current directory of pmcd(1) when pmdashping 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.

       -I   Amount of time (in seconds) between subsequent executions of  the  list  of  commands
	    provided via the configuration file configfile.  The default is 2 minutes.

       -t   Amount  of time (in seconds) to wait before timing out awaiting a response for a com-
	    mand from configfile.  The default is 20 seconds.

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

       The required configfile specifies ``tag'' and ``command'' pairs, each on a separate  line.
       All  of the commands are run one after another, with the whole group rescheduled to be run
       once per interval.  For each command that is run, pmdashping records  information  related
       to the success (or timeout), exit status, elapsed time and CPU time (system and user), and
       this information is exported by the PMDA.  The tags are used to	identify  the  individual
       commands  amongst  the  values exported by the PMDA, and form the external instance domain
       identifiers for the pmdashping metrics which relate to each command.

INSTALLATION
       In order for a host to export the names, help text and values for the  shping  performance
       metrics, do the following as root:

	    # cd $PCP_PMDAS_DIR/shping
	    # ./Install

       The set of ``tag'' and ``command'' pairs may be specified from a default (sample) configu-
       ration file, a customized file or entered interactively as part of the Install script.

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

	    # cd $PCP_PMDAS_DIR/shping
	    # ./Remove

       pmdashping 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 pmdashping
       $PCP_PMDAS_DIR/shping/help
		 default help text file for the shping metrics
       $PCP_PMDAS_DIR/shping/sample.conf
		 example configuration file with a number of common commands
       $PCP_PMDAS_DIR/shping/Install
		 installation script for the pmdashping agent
       $PCP_PMDAS_DIR/shping/Remove
		 undo installation script for pmdashping
       $PCP_LOG_DIR/pmcd/shping.log
		 default log file for error messages and other information from pmdashping

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
       pmcd(1) and pmgshping(1).

Performance Co-Pilot			       PCP				    PMDASHPING(1)
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