pmdagfs2(1) — Linux manual page


PMDAGFS2(1)                General Commands Manual               PMDAGFS2(1)

NAME         top

       pmdagfs2 - Global Filesystem v2 (GFS2) PMDA

DESCRIPTION         top

       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. 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

       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.

INSTALLATION         top

       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         top

           default help text file for the GFS2 metrics

           installation script for the pmdagfs2 agent

           undo installation script for the pmdagfs2 agent

           default log file for error messages from pmdagfs2


       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).

SEE ALSO         top

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

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2020-08-13.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-08-11.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot                 PCP                         PMDAGFS2(1)