huschi.net

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 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 speci-
       fying 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_LVM-
              POLLD_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: /usr/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 2.02.187(2)-RHEL7 (2020-03-24)        LVMPOLLD(8)