centos man page for pmdagfs2

PMDAGFS2(1)						      General Commands Manual						       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 filesys-
       tem.  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  stor-
       age  within  a clustered environment. However 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 messages 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 corresponding 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 configura-
       tion file, as described in pcp.conf(5).

SEE ALSO
       pmcd(1), pmstore(1), and gfs2(5).

Performance Co-Pilot							PCP							       PMDAGFS2(1)