lvmpolld(8) - man - phpMan

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 ini‐
       tialised operations originating in LVM2 command line tool.  The requests for  polling  origi‐
       nate 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 un‐
       solicited 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_lvm‐‐
       polld 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 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/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 op‐
              tion 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 2.03.11(2) (2021-01-08)                      LVMPOLLD(8)