bionic (1) pmdalio.1.gz

NAME

       pmdalio - Linux LIO subsystem PMDA

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.  Additional, 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.

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.

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

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

       pmcd(1), pminfo(1) and pmpython(1).