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  originating  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.

       -l, --log {all|wire|debug}
              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
              Path  to  the  pidfile.  This  overrides  both  the  built-in  default (/run/lvmpolld.pid) and the
              environment variable LVM_LVMPOLLD_PIDFILE.  This file is used to prevent 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: /lvm). Use for testing purposes only.

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

       --dump Contact the running lvmpolld daemon to obtain the complete 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)

Red Hat Inc                            LVM TOOLS 2.02.176(2) (2017-11-03)                            LVMPOLLD(8)