o2hbmonitor - Monitors disk heartbeat in the O2CB cluster stack
is a utility to monitor the disk heartbeat in the o2cb
cluster stack. It tracks the time elapsed since the last heartbeat and logs
messages once it exceeds the warn threshold.
By default, it runs as a daemon and logs messages to the system logger. It can
be started at any time and stopped using kill(1)
. It does not affect
the functioning of the heartbeat thread. It is typically automatically started
during cluster online and stopped during cluster offline by the o2cb
This utility expects the debugfs
file system to be mounted at
- -w percent
- Warn threshold percent. It is the percentage of the idle
threshold. It defaults to 50%.
- Interactive mode. It works as a daemon by default. This
mode is typically only used for debugging.
- Verbose mode. It logs messages only to the system logger by
default. In this mode it also logs the messages to stdout.
- Displays version.
This utility works with Linux kernel 2.6.37
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