| Documentation\Configuration\Tools\Manager\Advanced Settings\Monitor Service
Domain Time II Monitor Servicedomtimem.cpl on the command line.
Domain Time II Monitor is a system service that runs in the background on Windows NT4/2K/XP/2003/Vista/2008 machines to periodically collect variance statistics
from your entire network, and also raise alerts if time variance on any machine exceeds the tolerances you specify.
The Monitor Service is designed to ensure that network administrators are alerted in the event that
the system time on any machine being monitored becomes out-of-sync with the primary time source.
The Monitor Service also keeps historical records of your variance scans so that you can easily spot
changes over time or find errors that would otherwise have gone unnoticed.
The Monitor Service is intended only for simple monitoring tasks. You'll want to use Domain Time II Audit Server
for more accurate results, notifications of non-responding machines, inclusion of NTP servers and Domain Time II Windows Time Agents in the monitoring, and true
Only machines that have Respond to DTCheck enabled can be monitored by the Monitor Service. By default, all Domain Time II Servers have this option enabled.
This setting is disabled by default on Clients. If you wish to include a machine running Client in the monitoring, you must enable its response to DTCheck.
You may do this remotely using Manager--see setting the Options on the Connection Details screen.
Installing the service
The Monitor Service is installed from the Advanced Settings tab page of Domain Time II Manager. Click on the Install
button to begin the installation.
Monitor Service Control Panel Applet
Once the Monitor Service has been installed, you may configure the service using its Control Panel applet. You can start the applet from
the Advanced Settings and Tools tab page of Domain Time II Manager or directly from the Control Panel.
Note: On Vista with UAC enabled, you must Shift+Right Click and choose Run As... from the context menu to launch the Control Panel applet.
On Windows Server Core, type in
Use the Domain Time II Monitor Control Panel applet to configure the Domain Time II Monitor Service.
Configuration is extremely simple.
The items in this section allow you to specify the type and amount of time variance that will be tolerated before Monitor generates an alert.
Settings in this section define the actions that Monitor will take when an alert is triggered.
The Status indicator is a graphical representation of the state of time synchronization on your network.
Under normal circumstances, this indicator will be green. If a time sync problem is detected, the
indicator will change to match the severity of the problem.
Click this button to pull up the the graphical Variance Report and Historical Records screen.
The Domain Time II Monitor Service Variance Report Screen
Reports written to disk are displayed in the Variance Reports window. You can double-click on any
report to pull it up (or highlight it and click the View Details button).
This allows you to easily keep and review historical records of your variance reports.
Note: You must have the Save scan details to disk option checked in the Monitor Settings section
of the Control Panel applet for the historical reports to be kept and displayed here.
Notice that summary details from each variance report are displayed in the Variances and Clock Comparisons
sections of the window when you highlight a historical record. You can view the complete details of the historical record by clicking
the View Details button.
Clicking this button will bring up a graphical display of your collected data. You can select from a wide variety of graph types that
let you see at a glance how well your network is being synchronized. You can also adjust the scale of the graph to your desired level
of accuracy (from milliseconds to minutes).
Click this button to bring up the Advanced Settings page.
The Domain Time II Monitor Service Advanced Settings Screen
Select which system to treat as the reference clock for variance reports using the radio buttons in this section. All variances in the report
will be calculated from this clock.
Important: Choosing a stable and reliable reference clock is critical to provide useful variance data on your network. If the reference clock's time varies
greatly, your network will show large variances from sample to sample even if your network is actually well-synchronized. This graph shows the disastrous results
of changing from a stable local GPS clock as a reference to an unstable internet source (time.windows.com):
The first 8 data points are using a stable local GPS clock as the reference clock,
the remainder are from an unstable Internet source