LVMPOLLD(8)    (LVM TOOLS 2.03.11(2) (2021-01-08))    LVMPOLLD(8)

     NAME
          lvmpolld - LVM poll daemon

     SYNOPSIS
          lvmpolld [-l|--log {all|wire|debug [-p|--pidfile
          pidfile_path] [-s|--socket socket_path] [-B|--binary
          lvm_binary_path] [-t|--timeout timeout_value]
          [-f|--foreground] [-h|--help] [-V|--version]

          lvmpolld [--dump]

     DESCRIPTION
          lvmpolld is polling daemon for LVM. The daemon receives
          requests for polling of already initialised operations orig-
          inating in LVM2 command line tool.  The requests for polling
          originate in the lvconvert, pvmove, lvchange or vgchange
          LVM2 commands.

          The purpose of lvmpolld is to reduce the number of spawned
          background processes per otherwise unique polling operation.
          There should be only one. It also eliminates the possibility
          of unsolicited termination of background process by external
          factors.

          lvmpolld is used by LVM only if it is enabled in lvm.conf(5)
          by specifying the global/use_lvmpolld setting. If this is
          not defined in the LVM configuration explicitly then default
          setting is used instead (see the output of lvmconfig --type
          default global/use_lvmpolld command).

     OPTIONS
          To run the daemon in a test environment both the
          pidfile_path and the socket_path should be changed from the
          defaults.

          -f, --foreground
               Don't fork, but run in the foreground.

          -h, --help
               Show help information.

           --log {all|
               Select the type of log messages to generate.  Messages
               are logged by syslog.  Additionally, when -f is given
               they are also sent to standard error.  There are two
               classes of messages: wire and debug. Selecting 'all'
               supplies both and is equivalent to a comma-separated
               list -l wire,debug.

          -p, --pidfile pidfile_path

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     LVMPOLLD(8)    (LVM TOOLS 2.03.11(2) (2021-01-08))    LVMPOLLD(8)

               Path to the pidfile. This overrides both the built-in
               default (/run/lvmpolld.pid) and the environment vari-
               able LVM_LVMPOLLD_PIDFILE.  This file is used to pre-
               vent more than one instance of the daemon running
               simultaneously.

          -s, --socket socket_path
               Path to the socket file. This overrides both the
               built-in default (/run/lvm/lvmpolld.socket) and the
               environment variable LVM_LVMPOLLD_SOCKET.

          -t, --timeout timeout_value
               The daemon may shutdown after being idle for the given
               time (in seconds). When the option is omitted or the
               value given is zero the daemon never shutdowns on idle.

          -B, --binary lvm_binary_path
               Optional path to alternative LVM binary (default:
               /usr/lvm). Use for testing purposes only.

          -V, --version
               Display the version of lvmpolld daemon.

          --dump
               Contact the running lvmpolld daemon to obtain the com-
               plete state and print it out in a raw format.

     ENVIRONMENT VARIABLES
          LVM_LVMPOLLD_PIDFILE
               Path for the pid file.

          LVM_LVMPOLLD_SOCKET
               Path for the socket file.

     SEE ALSO
          lvm(8), lvm.conf(5)

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