агент домена метрик производительности файловой системы XFS (PMDA) (XFS filesystem performance metrics domain agent (PMDA))
Имя (Name)
pmdaxfs - XFS filesystem performance metrics domain agent (PMDA)
Синопсис (Synopsis)
$PCP_PMDAS_DIR/xfs/pmdaxfs [-d domain] [-l logfile]
Описание (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.
Установка (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 following 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.
Файлы (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
Окружение PCP (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 configuration file, as described in
pcp.conf(5).
Смотри также (See also)
PCPIntro(1), pmcd(1), pmstore(1), pcp.conf(5) and pcp.env(5).
