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
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.
Further details on clustering and GFS2 can be found at
Install the GFS2 PMDA by using the Install script as root:
# cd $PCP_PMDAS_DIR/gfs2
To uninstall, do the following as root:
# cd $PCP_PMDAS_DIR/gfs2
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.
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).
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 ⟨git://git.pcp.io/pcp⟩ on 2017-03-13. 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
Performance Co-Pilot PCP PMDAGFS2(1)