1PMDAGFS2(1)                 General Commands Manual                PMDAGFS2(1)
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NAME

6       pmdagfs2 - Global Filesystem v2 (GFS2) PMDA
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DESCRIPTION

9       pmdagfs2  is  a  Performance  Metrics Domain Agent (PMDA) which exports
10       metric values about mounted GFS2 filesystems from the debugfs  filesys‐
11       tem.   This  PMDA requires debugfs along with at least one mounted GFS2
12       filesystem to be mounted in order to be able to provide metric data.
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14       This PMDA can be used with GFS2 filesystems which are both  mounted  as
15       local  filesystems and filesystems which are  mounted as shared storage
16       within a clustered environment. However there are  some  metrics  which
17       specifically  require GFS2 to be setup in a clustered environment to be
18       able to provide metric data. This is due to them expecting locking mes‐
19       sages to be passed via the distributed lock manager (DLM) between nodes
20       of a cluster in order to generate their output.
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22       These cluster-environment-only metrics  can  be  distinguished  by  the
23       inclusion  of  their  corresponding control metrics so that they can be
24       optionally enabled or disabled on systems where they are not desired to
25       be monitored or not supported.
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27       pmstore(3)  can  be  used  to assign values to these control metrics in
28       order to enable (1) or disable (0) them.  This mechanism is also useful
29       on  distributions  that do not currently have full support for the GFS2
30       trace-points or provide older versions of the GFS2 driver.
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32       Further details on clustering and GFS2  can  be  found  at  http://red‐
33       hat.com
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INSTALLATION

36       Install the GFS2 PMDA by using the Install script as root:
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38             # cd $PCP_PMDAS_DIR/gfs2
39             # ./Install
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41       To uninstall, do the following as root:
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43             # cd $PCP_PMDAS_DIR/gfs2
44             # ./Remove
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46       pmdagfs2  is launched by pmcd(1) and should never be executed directly.
47       The Install and Remove scripts notify pmcd when the agent is  installed
48       or removed.
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FILES

51       $PCP_PMDAS_DIR/gfs2/help
52           default help text file for the GFS2 metrics
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54       $PCP_PMDAS_DIR/gfs2/Install
55           installation script for the pmdagfs2 agent
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57       $PCP_PMDAS_DIR/gfs2/Remove
58           undo installation script for the pmdagfs2 agent
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60       $PCP_LOG_DIR/pmcd/gfs2.log
61           default log file for error messages from pmdagfs2
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PCP ENVIRONMENT

64       Environment variables with the prefix PCP_ are used to parameterize the
65       file and directory names used by PCP. On each  installation,  the  file
66       /etc/pcp.conf  contains  the  local  values  for  these variables.  The
67       $PCP_CONF variable may be used to specify an alternative  configuration
68       file, as described in pcp.conf(5).
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SEE ALSO

71       pmcd(1), pmstore(1), and gfs2(5).
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75Performance Co-Pilot                  PCP                          PMDAGFS2(1)
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