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 notification.

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 © 2004, 2010 Oracle. All rights reserved.

Version 1.6.4                                    September 2010                                  ocfs2_hb_ctl(8)