LVMETAD(8)                           System Manager's Manual                           LVMETAD(8)



NAME
       lvmetad — LVM metadata cache daemon

SYNOPSIS
       lvmetad [-l {all|wire|debug}] [-p pidfile_path] [-s socket_path] [-f] [-h] [-V] [-?]

DESCRIPTION
       lvmetad  is a metadata caching daemon for LVM. The daemon receives notifications from udev
       rules (which must be installed for LVM to work correctly when lvmetad is in use).  Through
       these  notifications,  lvmetad has an up-to-date and consistent image of the volume groups
       available in the system.

       lvmetad is  used  by  LVM  only  if  it  is  enabled  in  lvm.conf(5)  by  specifying  the
       global/use_lvmetad  setting.  If  this  is not defined in the LVM configuration explicitly
       then default setting is used instead (see the output  of  lvm  dumpconfig  --type  default
       global/use_lvmetad 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     Don't fork, but run in the foreground.

       -h, -? Show help information.

       -l {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.  Since release
              2.02.98, there are two classes of messages: wire and debug.  Selecting  'all'  sup‐
              plies  both  and  is  equivalent to a comma-separated list -l wire,debug.  Prior to
              release 2.02.98, repeating -d from 1 to 3 times, viz. -d, -dd, -ddd, increased  the
              detail of messages.

       -p pidfile_path
              Path  to  the  pidfile. This overrides both the built-in default (/run/lvmetad.pid)
              and the environment variable LVM_LVMETAD_PIDFILE.  This file  is  used  to  prevent
              more than one instance of the daemon running simultaneously.

       -s socket_path
              Path   to   the   socket   file.   This   overrides   both   the  built-in  default
              (/run/lvm/lvmetad.socket) and the environment variable LVM_LVMETAD_SOCKET.  To com‐
              municate  successfully  with lvmetad, all LVM2 processes should use the same socket
              path.

       -V     Display the version of lvmetad daemon.

ENVIRONMENT VARIABLES
       LVM_LVMETAD_PIDFILE
              Path for the pid file.

       LVM_LVMETAD_SOCKET
              Path for the socket file.


SEE ALSO
       lvm(8), lvm.conf(5)



Red Hat Inc                     LVM TOOLS 2.02.111(2) (2014-09-01)                     LVMETAD(8)