PMDAGFS2(1) General Commands Manual PMDAGFS2(1)NAME
pmdagfs2 - Global Filesystem v2 (GFS2) PMDA
DESCRIPTION
pmdagfs2 is a Performance Metrics Domain Agent (PMDA) which exports metric values about mounted GFS2 filesystems from the debugfs filesys-
tem. 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 stor-
age 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.
Further details on clustering and GFS2 can be found at http://redhat.com
INSTALLATION
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
$PCP_PMDAS_DIR/gfs2/help
default help text file for the GFS2 metrics
$PCP_PMDAS_DIR/gfs2/Install
installation script for the pmdagfs2 agent
$PCP_PMDAS_DIR/gfs2/Remove
undo installation script for the pmdagfs2 agent
$PCP_LOG_DIR/pmcd/gfs2.log
default log file for error messages from pmdagfs2
PCP ENVIRONMENT
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 configura-
tion file, as described in pcp.conf(5).
SEE ALSO pmcd(1), pmstore(1), and gfs2(5).
Performance Co-Pilot PCP PMDAGFS2(1)
Check Out this Related Man Page
PMDALUSTERCOMM(1) General Commands Manual PMDALUSTERCOMM(1)NAME
pmdalustrecomm - Lustre filesystem comms performance metrics domain agent (PMDA)
SYNOPSIS
$PCP_PMDAS_DIR/lustrecomm/pmdalustrecomm [-d domain] [-l logfile] [-U username]
DESCRIPTION
pmdalustrecomm is a Performance Metrics Domain Agent (PMDA) which extracts performance metrics from the Linux procfs filesystem about the
state of various aspects of the Lustre filesystem.
The lustrecomm PMDA exports metrics that focus on distributed communication in the filesystem, including metrics related to timeouts, net-
work drops, send/recv information and route lengths. However, it also covers the memory use of some of the Lustre filesystem components.
A brief description of the pmdalustrecomm command line options follows:
-d It is absolutely crucial that the performance metrics domain number specified here is unique and consistent. That is, domain should
be different for every PMDA on the one host, and the same domain number should be used for the same PMDA on all hosts.
-l Location of the log file. By default, a log file named lustrecomm.log is written in the current directory of pmcd(1) when pmdalus-
trecomm is started, i.e. $PCP_LOG_DIR/pmcd. If the log file cannot be created or is not writable, output is written to the standard
error instead.
-U User account under which to run the agent. The default is the unprivileged "pcp" account in current versions of PCP, but in older
versions the superuser account ("root") was used by default.
INSTALLATION
If you want access to the names, help text and values for the lustrecomm performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/lustrecomm
# ./Install
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/lustrecomm
# ./Remove
pmdalustrecomm is launched by pmcd(1) and should never be executed directly. The Install and Remove scripts notify pmcd(1) when the agent
is installed or removed.
FILES
$PCP_PMCDCONF_PATH
command line options used to launch pmdalustrecomm
$PCP_PMDAS_DIR/lustrecomm/help
default help text file for the lustrecomm metrics
$PCP_PMDAS_DIR/lustrecomm/Install
installation script for the pmdalustrecomm agent
$PCP_PMDAS_DIR/lustrecomm/Remove
undo installation script for the pmdalustrecomm agent
$PCP_LOG_DIR/pmcd/lustrecomm.log
default log file for error messages and other information from pmdalustrecomm
PCP ENVIRONMENT
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 configura-
tion file, as described in pcp.conf(5).
SEE ALSO PCPIntro(1), pmcd(1), pcp.conf(5) and pcp.env(5).
Performance Co-Pilot PCP PMDALUSTERCOMM(1)