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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 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: /sbin/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)



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