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PMDALUSTERCOMM(1)								PMDALUSTERCOMM(1)

NAME
       pmdalustrecomm - Lustre filesystem comms performance metrics domain agent (PMDA)

SYNOPSIS
       $PCP_PMDAS_DIR/lustrecomm/pmdalustrecomm [-d domain] [-l logfile] [-U username]

DESCRIPTION
       pmdalustrecomm  is  a  Performance  Metrics Domain Agent (PMDA) which extracts performance
       metrics from the Linux procfs filesystem about the state of various aspects of the  Lustre
       filesystem.

       The  lustrecomm	PMDA  exports  metrics	that  focus  on  distributed communication in the
       filesystem, including metrics related to timeouts, network  drops,  send/recv  information
       and  route lengths.  However, it also covers the memory use of some of the Lustre filesys-
       tem components.

       A brief description of the pmdalustrecomm 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 lustrecomm.log is written  in
	    the   current   directory	of   pmcd(1)   when   pmdalustrecomm   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.

       -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 lustrecomm performance met-
       rics, do the following as root:

	    # cd $PCP_PMDAS_DIR/lustrecomm
	    # ./Install

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

	    # cd $PCP_PMDAS_DIR/lustrecomm
	    # ./Remove

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

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), pcp.conf(5) and pcp.env(5).

Performance Co-Pilot			       PCP				PMDALUSTERCOMM(1)
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