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 back‐
ground 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. Select‐
ing '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 run‐
ning 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/sbin/lvm). Use for testing purposes only.
-V, --version
Display the version of lvmpolld daemon.
Red Hat Inc LVM TOOLS 2.02.166(2)-RHEL7 (2016-11-16) LVMPOLLD(8)
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