1ocfs2_hb_ctl(8)               OCFS2 Manual Pages               ocfs2_hb_ctl(8)
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NAME

6       ocfs2_hb_ctl - Starts and stops the O2CB local heartbeat on a given de‐
7       vice.
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SYNOPSIS

10       ocfs2_hb_ctl -S -d device service
11       ocfs2_hb_ctl -S -u uuid service
12       ocfs2_hb_ctl -K -d device service
13       ocfs2_hb_ctl -K -u uuid service
14       ocfs2_hb_ctl -I -d device
15       ocfs2_hb_ctl -I -u uuid
16       ocfs2_hb_ctl -P -d device [-n io_priority]
17       ocfs2_hb_ctl -P -u uuid [-n io_priority]
18       ocfs2_hb_ctl -h
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DESCRIPTION

22       ocfs2_hb_ctl starts and stops local heartbeat on a OCFS2 device.  Users
23       are  strongly  urged not to use this tool directly. It is automatically
24       invoked by mount.ocfs2(8) and other tools that require heartbeat  noti‐
25       fications.
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27       This  utility  only  operates  in  the  local  heartbeat mode. It fails
28       silently when run in global heartbeat mode.  More  information  on  the
29       heartbeat modes can be found in o2cb(7).
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31       The tools accepts devices to be specified by its name or its uuid. Ser‐
32       vice denotes the application that is requesting the heartbeat notifica‐
33       tion.
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OPTIONS

37       -S     Starts the heartbeat.
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40       -K     Stops the heartbeat.
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43       -I     Prints the heartbeat reference counts for that heartbeat region.
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46       -d     Specify region by device name.
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49       -u     Specify region by device uuid.
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52       -n     Adjust  IO  priority for the heartbeat thread. This option calls
53              the ionice tool to set its IO scheduling class to realtime  with
54              scheduling  class  data as provided.  This option is usable only
55              with the O2CB cluster stack.
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58       -h     Displays help and exit.
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SEE ALSO

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

67       Oracle Corporation
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71       Copyright © 2004, 2012 Oracle. All rights reserved.
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75Version 1.8.7                    January 2012                  ocfs2_hb_ctl(8)
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