CentOS 7.0 - man page for pmdagfs2 (centos section 1)

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PMDAGFS2(1)									      PMDAGFS2(1)

NAME
       pmdagfs2 - Global Filesystem v2 (GFS2) PMDA

DESCRIPTION
       pmdagfs2  is  a	Performance Metrics Domain Agent (PMDA) which exports metric values about
       mounted GFS2 filesystems from the debugfs filesystem.  This PMDA  requires  debugfs  along
       with  at  least	one  mounted GFS2 filesystem to be mounted in order to be able to provide
       metric data.

       This PMDA can be used with GFS2 filesystems which are both mounted  as  local  filesystems
       and  filesystems which are  mounted as shared storage within a clustered environment. How-
       ever there are some metrics which specifically require GFS2 to be  setup  in  a	clustered
       environment  to be able to provide metric data. This is due to them expecting locking mes-
       sages to be passed via the distributed lock manager (DLM) between nodes of  a  cluster  in
       order to generate their output.

       These cluster-environment-only metrics can be distinguished by the inclusion of their cor-
       responding control metrics so that they can be optionally enabled or disabled  on  systems
       where they are not desired to be monitored or not supported.

       pmstore(3) can be used to assign values to these control metrics in order to enable (1) or
       disable (0) them.  This mechanism is also useful on distributions that  do  not	currently
       have full support for the GFS2 trace-points or provide older versions of the GFS2 driver.

       Further details on clustering and GFS2 can be found at http://redhat.com

INSTALLATION
       Install the GFS2 PMDA by using the Install script as root:

	     # cd $PCP_PMDAS_DIR/gfs2
	     # ./Install

       To uninstall, do the following as root:

	     # cd $PCP_PMDAS_DIR/gfs2
	     # ./Remove

       pmdagfs2  is  launched  by pmcd(1) and should never be executed directly.  The Install and
       Remove scripts notify pmcd when the agent is installed or removed.

FILES
       $PCP_PMDAS_DIR/gfs2/help
	   default help text file for the GFS2 metrics

       $PCP_PMDAS_DIR/gfs2/Install
	   installation script for the pmdagfs2 agent

       $PCP_PMDAS_DIR/gfs2/Remove
	   undo installation script for the pmdagfs2 agent

       $PCP_LOG_DIR/pmcd/gfs2.log
	   default log file for error messages from pmdagfs2

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), pmstore(1), and gfs2(5).

Performance Co-Pilot			       PCP				      PMDAGFS2(1)
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