образец агента домена метрик производительности (PMDA) (sample performance metrics domain agent (PMDA))
Имя (Name)
pmdasample - sample performance metrics domain agent (PMDA)
Синопсис (Synopsis)
$PCP_PMDAS_DIR/pmdasample [-d domain] [-i port] [-l logfile] [-p]
[-u socket] [-U username]
Описание (Description)
pmdasample is a sample Performance Metrics Domain Agent (PMDA)
which exports a variety of synthetic performance metrics.
This PMDA was developed as part of the quality assurance testing
for the PCP product, but has other uses, most notably in the
development of new PCP clients.
The metrics exported by the sample PMDA cover the full range of
data types, data semantics, value cardinality, instance domain
stability and error conditions found in real PMDAs.
A brief description of the pmdasample 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.
-i Expect PMCD to connect to pmdasample on the specified TCP/IP
port. port may be a port number or port name.
-l Location of the log file. By default, a log file named
sample.log is written in the current directory of pmcd(1)
when pmdasample 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.
-p Expect PMCD to create a pipe and the connection to
pmdasample is via standard input and standard output. This
is the default connection mode.
-u Expect PMCD to connect to pmdasample on the Unix domain
socket named socket.
-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.
At most one of the options -i, -p and -u may be specified.
Установка (Installation)
If you want access to the names, help text and values for the
sample performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/sample
# ./Install
Note that the installation script also installs the DSO version
of the sample PMDA, so there are in fact two PMDAs installed, and
two sets of performance metrics, namely sample.* and
sampledso.*.
If you want to undo the installation (and remove both PMDAs), do
the following as root:
# cd $PCP_PMDAS_DIR/sample
# ./Remove
pmdasample 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 pmdasample
$PCP_PMDAS_DIR/sample/help
default help text file for the sample metrics
$PCP_PMDAS_DIR/sample/Install
installation script for the pmdasample agent
$PCP_PMDAS_DIR/sample/Remove
undo installation script for the pmdasample agent
$PCP_LOG_DIR/pmcd/sample.log
default log file for error messages and other information
from pmdasample
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), pmdasimple(1), pmdatrivial(1),
pmdatxmon(1), pcp.conf(5) and pcp.env(5).
