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LVMPOLLD(8)                          System Manager's Manual                          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 other‐
       wise unique polling operation. There should be only one. It also eliminates the  possibil‐
       ity 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.  Addi‐
              tionally, 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 equiva‐
              lent 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/lvm‐
              polld.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  pur‐
              poses 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 2.02.133(2) (2015-10-30)                    LVMPOLLD(8)

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