Managing Serviceguard Eighteenth Edition, September 2010

dependencies operate in this fashion – a package will not be run unless the specified
EMS resources conditions are met.
NOTE: When using the volume monitor to monitor LVM logical volumes, you need
to make sure that the logical volume timeout value is properly configured. This value
should be configured to be at least one second less than the poll-interval specified in the
monitor service command. I/O requests to logical volumes with no timeout set may
block indefinitely. See “Setting Logical Volume Timeouts” (page 234) for more
information.
Command Syntax
The syntax for the monitoring command, cmvolmond, is as follows:
cmvolmond [-h, --help] [-v, --version]
[-O, --log-file <log_file>
[-D, --log-level <1-7>
[-t, --poll-interval <seconds>
<volume_path> [<volume_path> ...]
A brief description of each parameter follows:
-h or --help
Displays the usage, as listed above, and exits.
NOTE: Do not include the help or version parameters in your service command; this
will result in immediate package failure at runtime.
-v or --version
Displays the monitor version and exits.
-O or --log-file
Specifies a file for logging (log messages are printed to the console by default).
-D or --log-level
Specifies the log level. The level of detail logged is directly proportional to the numerical
value of the log level. That is, a log level of 7 will provide the greatest amount of log
information. The default log level is 0.
-t or --poll-interval
Specifies the interval between volume probes. You can specify a polling interval of as
little as 1 (one second), but bear in mind that a short polling interval (less than 10
seconds) may impair system performance if you are monitoring a large number of
volumes. HP recommends a polling interval of at least 10 seconds if 50 or more volumes
are being monitored by a single service command. The default polling interval is 60
seconds. In the event of a failed read attempt on a storage volume, the monitor service
will terminate after a single poll interval. If a read attempt never completes, the monitor
Package Configuration Planning 173