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 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.

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

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 2023-12-22.
       (At that time, the date of the most recent commit that was found
       in the repository was 2023-12-16.)  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)