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pmdagfs2(1) [centos man page]

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)

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PMDAXFS(1)						      General Commands Manual							PMDAXFS(1)

NAME
pmdaxfs - XFS filesystem performance metrics domain agent (PMDA) SYNOPSIS
$PCP_PMDAS_DIR/xfs/pmdaxfs [-d domain] [-l logfile] DESCRIPTION
pmdaxfs is a Performance Metrics Domain Agent (PMDA) which extracts performance metrics describing the state of the XFS filesystem from the Linux kernel. The xfs PMDA exports metrics that measure information about metadata buffer usage, the journal, btree operations, inode operations, extended attributes, directories, quotas, read and write operation counts and of course throughput. The PMDA provides a facility to reset the values of all counters to zero using pmstore(1) with the xfs.control.reset metric. A brief description of the pmdaxfs 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 xfs.log is written in the current directory of pmcd(1) when pmdaxfs 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. INSTALLATION
The xfs PMDA is installed and available by default on Linux. If you want to undo the installation, do the following as root: # cd $PCP_PMDAS_DIR/xfs # ./Remove If you want to establish access to the names, help text and values for the XFS performance metrics once more, after removal, do the follow- ing as root: # cd $PCP_PMDAS_DIR/xfs # ./Install pmdaxfs 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 pmdaxfs $PCP_PMDAS_DIR/xfs/help default help text file for the xfs metrics $PCP_PMDAS_DIR/xfs/Install installation script for the pmdaxfs agent $PCP_PMDAS_DIR/xfs/Remove undo installation script for the pmdaxfs agent $PCP_LOG_DIR/pmcd/xfs.log default log file for error messages and other information from pmdaxfs 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), pmstore(1), pcp.conf(5) and pcp.env(5). Performance Co-Pilot PCP PMDAXFS(1)
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