o2hbmonitor

o2hbmonitor(8) OCFS2 Manual Pages o2hbmonitor(8)

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.