pmdalustrecomm - Online in the Cloud

PROGRAM:

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.

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