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,
network 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 pmdalustrecomm 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 configuration
file, as described in
pcp.conf(5).
SEE ALSO¶
PCPIntro(1),
pmcd(1),
pcp.conf(5) and
pcp.env(5).