ocfs2_hb_ctl - Starts and stops the O2CB local heartbeat on a given device.

       Oracle Corporation

       Copyright © 2004, 2012 Oracle. All rights reserved.

Version 1.8.8                                     January 2012                                   ocfs2_hb_ctl(8)

ocfs2_hb_ctl  starts  and  stops  local heartbeat on a OCFS2 device.  Usersarestronglyurgednottousethistooldirectly. It is automatically invoked by mount.ocfs2(8) and other tools that require  heartbeat
       notifications.

       This  utility  only  operates in the local heartbeat mode. It fails silently when run in global heartbeat
       mode. More information on the heartbeat modes can be found in o2cb(7).

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

       ocfs2_hb_ctl - Starts and stops the O2CBlocal heartbeat on a given device.

-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.

mount.ocfs2(8)o2cb(7)o2cb(8)o2cb.sysconfig(5)ocfs2.cluster.conf(5)o2cluster(8)

ocfs2_hb_ctl-S-ddeviceserviceocfs2_hb_ctl-S-uuuidserviceocfs2_hb_ctl-K-ddeviceserviceocfs2_hb_ctl-K-uuuidserviceocfs2_hb_ctl-I-ddeviceocfs2_hb_ctl-I-uuuidocfs2_hb_ctl-P-ddevice [-nio_priority]
       ocfs2_hb_ctl-P-uuuid [-nio_priority]
       ocfs2_hb_ctl-h