1o2hbmonitor(8)                OCFS2 Manual Pages                o2hbmonitor(8)
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NAME

6       o2hbmonitor - Monitors disk heartbeat in the O2CB cluster stack
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SYNOPSIS

9       o2hbmonitor [-w percent] [-ivV]
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DESCRIPTION

12       o2hbmonitor  is  a  utility  to  monitor the disk heartbeat in the o2cb
13       cluster stack. It tracks the time elapsed since the last heartbeat  and
14       logs messages once it exceeds the warn threshold.
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16       By default, it runs as a daemon and logs messages to the system logger.
17       It can be started at any time and stopped using kill(1).  It  does  not
18       affect  the  functioning of the heartbeat thread. It is typically auto‐
19       matically started during cluster online and stopped during cluster off‐
20       line by the o2cb init script.
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22       This utility expects the debugfs file system to be mounted at /sys/ker‐
23       nel/debug.
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OPTIONS

27       -w percent
28              Warn threshold percent. It is the percentage of the idle thresh‐
29              old. It defaults to 50%.
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32       -i     Interactive  mode. It works as a daemon by default. This mode is
33              typically only used for debugging.
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36       -v     Verbose mode. It logs messages only to the system logger by  de‐
37              fault. In this mode it also logs the messages to stdout.
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40       -V     Displays version.
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NOTES

44       This utility works with Linux kernel 2.6.37 and later.
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SEE ALSO

48       o2cb(7)
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AUTHORS

52       Oracle Corporation
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56       Copyright © 2010, 2012 Oracle. All rights reserved.
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60Version 1.8.7                    January 2012                   o2hbmonitor(8)
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