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ocfs2_hb_ctl(8) OCFS2 Manual Pages ocfs2_hb_ctl(8)
NAME
ocfs2_hb_ctl - Starts and stops the O2CB local 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 local heartbeat on a OCFS2 device. Users
are strongly urged not to use this tool directly. It is automatically
invoked by mount.ocfs2(8) and other tools that require heartbeat noti‐
fications.
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. Ser‐
vice denotes the application that is requesting the heartbeat notifica‐
tion.
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
mount.ocfs2(8) o2cb(7) o2cb(8) o2cb.sysconfig(5) ocfs2.cluster.conf(5)
o2cluster(8)
AUTHORS
Oracle Corporation
COPYRIGHT
Copyright © 2004, 2012 Oracle. All rights reserved.
Version 1.8.2 January 2012 ocfs2_hb_ctl(8)
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