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.
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# ./Removepmdagfs2 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.
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
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to email@example.com. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2021-06-20.
(At that time, the date of the most recent commit that was found
in the repository was 2021-06-19.) 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)