подсистема Linux LIO PMDA (Linux LIO subsystem PMDA)
Имя (Name)
pmdalio - Linux LIO subsystem PMDA
Описание (Description)
pmdalio is a Performance Metrics Domain Agent (PMDA) which
exports metric values about the Linux I/O target subsystem, which
provides for protocols like iSCSI, FCP, FCoE. These allow
storage available on one host to be exported and consumed by
other hosts using industry standard protocols.
This PMDA exports summary metrics which are performance value
aggregations and configuration per LIO target instance.
Additionally, it provides per LUN performance metrics including
IOPS, and READ and WRITE throughput.
The LIO configuration is maintained within the kernel's configfs
virtual filesystem. The python-rtslib module provides an
interface to configfs, allowing tools like pmdalio to interact
with the settings and metadata held in configfs.
Установка (Installation)
Install the lio PMDA by using the Install script as root:
# cd $PCP_PMDAS_DIR/lio
# ./Install
To uninstall, do the following as root:
# cd $PCP_PMDAS_DIR/lio
# ./Remove
pmdalio 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_PMDAS_DIR/lio/Install
installation script for the pmdalio agent
$PCP_PMDAS_DIR/lio/Remove
undo installation script for the pmdalio agent
$PCP_LOG_DIR/pmcd/lio.log
default log file for error messages from pmdalio
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), pminfo(1) and pmpython(1).
