ocfs2_hb_ctl(8) 						OCFS2 Manual Pages						   ocfs2_hb_ctl(8)

NAME

       ocfs2_hb_ctl - Starts and stops the OCFS2 heartbeat on a given device.

SYNOPSIS

       ocfs2_hb_ctl -S -d device service
       ocfs2_hb_ctl -S -u uuid service
       ocfs2_hb_ctl -K -d device service
       ocfs2_hb_ctl -K -u uuid service
       ocfs2_hb_ctl -I -d device
       ocfs2_hb_ctl -I -u uuid
       ocfs2_hb_ctl -P -d device [-n io_priority]
       ocfs2_hb_ctl -P -u uuid [-n io_priority]
       ocfs2_hb_ctl -h

DESCRIPTION

       ocfs2_hb_ctl starts and stops the heartbeat on a OCFS2 device.  Users are strongly urged not to use this tool directly. It is automatically
       invoked by mount.ocfs2 and other tools that require heartbeat notifications.

       The tools accepts devices to be specified by its name or its uuid. Service denotes the application that is requesting the heartbeat notifi-
       cation.

OPTIONS

       -S     Starts the heartbeat.

       -K     Stops the heartbeat.

       -I     Prints the heartbeat reference counts for that heartbeat region.

       -d     Specify region by device name.

       -u     Specify region by device uuid.

       -n     Adjust  IO  priority  for  the  heartbeat  thread. This option calls the ionice tool to set its IO scheduling class to realtime with
	      scheduling class data as provided.  This option is usable only with the O2CB cluster stack.

       -h     Displays help and exit.

SEE ALSO

       mkfs.ocfs2(8) fsck.ocfs2(8) tunefs.ocfs2(8) mounted.ocfs2(8) ocfs2console(8) debugfs.ocfs2(8)

AUTHORS

       Oracle Corporation

COPYRIGHT

       Copyright (C) 2004, 2010 Oracle. All rights reserved.

Version 1.4.3							   February 2010						   ocfs2_hb_ctl(8)