o2hbmonitor
Section: OCFS2 Manual Pages (8)
Updated: January 2012
Page Index
NAME
o2hbmonitor - Monitors disk heartbeat in the O2CB cluster stack
SYNOPSIS
o2hbmonitor [
-w percent] [
-ivV]
DESCRIPTION
o2hbmonitor 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 init script.
This utility expects the debugfs file system to be mounted at /sys/kernel/debug.
OPTIONS
- -w percent
-
Warn threshold percent. It is the percentage of the idle threshold. It defaults to 50%.
- -i
-
Interactive mode. It works as a daemon by default. This mode is typically only used
for debugging.
- -v
-
Verbose mode. It logs messages only to the system logger by default. In this mode it also
logs the messages to stdout.
- -V
-
Displays version.
NOTES
This utility works with Linux kernel
2.6.37 and later.
SEE ALSO
o2cb(7)
AUTHORS
Oracle Corporation
COPYRIGHT
Copyright © 2010, 2012 Oracle. All rights reserved.