clvmd man page on YellowDog

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CLVMD(8)							      CLVMD(8)

NAME
       clvmd - cluster LVM daemon

SYNOPSIS
       clvmd [-d [<value>]] [-C] [-h] [-R] [-t <timeout>] [-T <start timeout>]
       [-V]

DESCRIPTION
       clvmd is the daemon that distributes  LVM  metadata  updates  around  a
       cluster.	  It must be running on all nodes in the cluster and will give
       an error if a node in the cluster does not have this daemon running.

OPTIONS
       -d [<value>]
	      Enable debug logging. Value can be 0, 1 or 2.
	      0 disables debug logging in a running clvmd
	      1 sends debug logs to stderr (clvmd will not fork in this case)
	      2 sends debug logs to syslog
	      If -d is specified without a value then 1 is assumed if you  are
	      starting	a  new clvmd, 2 if you are enabling debug in a running
	      clvmd.

       -C     Only valid if -d is also specified. Tells all clvmds in a	 clus‐
	      ter  to enable/disable debug logging.  Without this switch, only
	      the local clvmd will change its debug level to that  given  with
	      -d.
	      This  does  not  work correctly if specified on the command-line
	      that starts clvmd.  If you want to start clvmd and enable	 clus‐
	      ter-wide logging then the command needs to be issued twice, eg:
	      clvmd
	      clvmd -d2

       -t <timeout>
	      Specifies	 the  timeout  for commands to run around the cluster.
	      This should not be so small that commands with many disk updates
	      to  do  will  fail,  so you may need to increase this on systems
	      with very large disk farms.  The default is 30 seconds.

       -T <start timeout>
	      Specifies the timeout for clvmd daemon startup.  If  the	daemon
	      does not report that it has started up within this time then the
	      parent command will exit with status of 5. This  does  NOT  mean
	      that clvmd has not started! What it means is that the startup of
	      clvmd has been delayed for some reason; the most likely cause of
	      this  is	an inquorate cluster though it could be due to locking
	      latencies on a cluster with large numbers of logical volumes. If
	      you  get	the  return  code  of 5 it is usually not necessary to
	      restart clvmd - it will start  as	 soon  as  that	 blockage  has
	      cleared.	This  flag  is	to  allow startup scripts to exit in a
	      timely fashion even if the cluster is stalled for some reason.
	      The default is 0 (no timeout) and the value is in seconds. Don't
	      set this too small or you will experience spurious errors. 10 or
	      20 seconds might be sensible.
	      This timeout will be ignored if you  start  clvmd	 with  the  -d
	      switch.

       -R     Tells  all  the  running	clvmds	in the cluster to reload their
	      device cache and re-read the lvm configuration file.  This  com‐
	      mand  should be run whenever the devices on a cluster system are
	      changed.

       -V     Display the version of the cluster LVM daemon.

SEE ALSO
       lvm(8)

Red Hat Inc			   LVM TOOLS			      CLVMD(8)
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