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Part 6: Ajax Web Interface—Device and Sensor Setup | 8 Sensor Settings
193 WMI File Sensor
6.8.193 WM I File Sensor
The WMI File monitors a file using Windows Management Instrumentation (WMI). It shows the file size and the last modified date.
For this sensor type credentials for Windows systems must be defined for the device you want to use the sensor on.
Note: Sensors using the Windows Management Instrumentation (WMI) protocol have high impact on the system performance! Try to stay below 200 WMI sensors per
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. Above
this number, please consider using multiple
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for load balancing.
For a general introduction to the technology behind WMI, please see
section.
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Add Sensor
The Add Sensor dialog appears when adding a new sensor on a device manually
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. It only shows the setting fields that are imperative for creating the sensor. Therefore, you will not see all setting fields in this dialog. You can change all settings in the sensor's Set t ings tab later.
Sensor Settings
On the sensor's details page, click on the Set t ings tab to change settings.
Note: If not set explicitly in a sensor's settings, it will connect to the IP Address or DNS Name defined in the settings of the parent device the sensor is created on.
Basic Sensor Set t ings
Sensor Name
Tags
Priority
Enter a meaningful name to identify the sensor. The name will be shown by default in the device tree and in all alarms.
Enter one or more tags, separated by space or comma. You can use tags to group sensors and use tag-filtered views later on. Tags are not case sensitive. We recommend using the default value. You can add additional tags to it, if you like. Other tags are
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from objects further up in the device tree. Those are not visible here.
Select a priority for the sensor. This setting determines where the sensor will be placed in sensor lists. Top priority will be at the top of a list. You can choose from one star (low priority) to five stars
(top priority).
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WMI File Monit or
File name
If timestamp changes
Enter the name of the file that this sensor will check. Please enter a full local path. The file must exist on the computer your local or remote probe is running on; UNC paths are not allowed here. For example, when creating this sensor on a device under the local probe, the file be accessible on the local system.
Define what shall be done in case the timestamp of the file changes. You can choose between:
·
Ignore changes (default ): No action will be taken on change.
·
Trigger 'On Change' not ificat ion: The sensor will send an internal message indicating that its value has changed. In combination with a Change Trigger, you can use this mechanism to
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whenever the sensor value changes.
Sensor Display
Primary Channel
Chart Type
Stack Unit
Select a channel from the list to define it as the primary channel. In the device tree, the last value of the primary channel will always be displayed underneath the sensor's name. The available options depend on what channels are available for this sensor. Note: You can set another primary channel later by clicking on the pin symbol of a channel in the sensor's overview tab.
Define how different channels will be shown for this sensor.
§ Show channels independent ly (default ): Show an own graph for each channel.
§ St ack channels on t op of each ot her: Stack channels on top of each other to create a multi-channel graph. This will generate an easy-to-read graph which visualizes the different components of your total traffic. Note: This option cannot be used in combination with manual Vertical Axis Scaling (available in the
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settings).
This setting is only available if stacked graphs are selected above.
Choose a unit from the list. All channels with this unit will be stacked on top of each other. By default, you cannot exclude single channels from stacking, if they use the selected unit.
However, there is an advanced procedure to do so.
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Part 6: Ajax Web Interface—Device and Sensor Setup | 8 Sensor Settings
193 WMI File Sensor
Inherited Settings
By default, all following settings are inherited from objects higher in the hierarchy and should be changed there, if necessary. Often, best practice is to change them centrally in the
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group's settings. To change a setting for this object, disable inheritance by clicking on the check mark symbol in front of the respective setting name. You will then see the options described below.
Scanning Int erval
Scanning Interval The scanning interval determines the time the sensor waits between two scans. Select a scanning interval (seconds, minutes, or hours) from the list. You can change the available intervals in
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.
Schedules, Dependencies, and Maint enance Window
Note: Inheritance for schedules, dependencies, and maintenance windows cannot be interrupted; the according settings from the parent objects will always be active. However, you can define additional settings here. They will be active in parallel to the parent objects' settings.
Schedule Select a schedule from the list. Schedules can be used to monitor for a certain time span (days, hours) throughout the week. With the period list option it is also possible to pause monitoring for a specific time span. You can create new schedules and edit existing ones in the
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. Note: Schedules are generally inherited. New schedules will be added to existing ones, so all schedules are active.
Maintenance Window Specify if you want to set-up a one-time maintenance window.
During a maintenance window this object and all child objects will not be monitored. They will enter a paused state then. Choose between:
§ Not set (monit or cont inuously ): No maintenance window will be set.
§ Set up a one-t ime maint enance window: Pause monitoring within a maintenance window.
Maintenance Begins At This field is only visible if maintenance window is enabled above.
Use the date time picker to enter the start date and time of the maintenance window.
Maintenance End At This field is only visible if maintenance window is enabled above.
Use the date time picker to enter the end date and time of the maintenance window.
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Schedules, Dependencies, and Maint enance Window
Dependency Type
Dependency
Delay (Seconds)
Define a dependency type. Dependencies can be used to pause monitoring for an object depending on the status of another. You can choose between:
§ Use parent : Pause the current sensor if the device it is created on is in a Down status, or if it is paused by another dependency.
§ Select object : Pause the current sensor if the device it is created on is in an Down status, or if it is paused by another dependency. Additionally, pause the current sensor if a specific other object in the device tree is in a Down status, or if it is paused by another dependency. Select below.
§ Mast er object for parent : Make this sensor the master object for its parent device. The sensor will influence the behavior of the device it is created on: If the sensor is in a Down status, the device will be paused. For example, it is a good idea to make a
Ping sensor the master object for its parent device to pause monitoring for all other sensors on the device in case the device cannot even be pinged. Additionally, the sensor will be paused if the parent group of its parent device is in a Down status, or if it is paused by another dependency.
Note: Testing your dependencies is easy! Simply choose Simulat e
Error St at us from the context menu of an object that other objects depend on. A few seconds later all dependent objects should be paused.
This field is only visible if the select object option is enabled above.
Click on the reading-glass symbol and use the
159 to choose an object on which the current sensor will be dependent on.
Define a time span. After the master object for this dependency comes back to an Up status, monitoring of the depending objects will be additionally delayed by the defined time span. This can help avoid false alarms, for example, after a server restart, by giving systems more time for all services to start up. Please enter an integer value in seconds. Note: This setting is not available if you choose this sensor to be the Mast er object for parent . In this case, please define delays in the parent
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or the
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.
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Part 6: Ajax Web Interface—Device and Sensor Setup | 8 Sensor Settings
193 WMI File Sensor
Access Right s
User Group Access Define which user group(s) will have access to the object you're editing. A table with user groups and right is shown; it contains all user groups from your setup. For each user group you can choose from the following access rights:
§ Inherit ed: Use the settings of the parent object.
§ None: Users in this group cannot see or edit the object. The object does not show up in lists and in the device tree.
Exception: If a child object is visible to the user, the object is visible in the device tree, though not accessible.
§ Read: Users in this group can see the object and review its monitoring results.
§ Writ e: Users in this group can see the object, review its monitoring results, and edit the object's settings. They cannot edit access rights settings.
§ Full: Users in this group can see the object, review its monitoring results, edit the object's settings, and edit access rights settings.
You can create new user groups in the
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settings. To automatically set all objects further down in the hierarchy to inherit this object's access rights, set a check mark for the Revert children's access right s t o inherit ed option.
For more details about access rights, please see section
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.
Channel Unit Configurat ion
Channel Unit Types For each type of sensor channel, define the unit in which data is displayed. If defined on probe, group, or device level, these settings can be inherited to all sensors underneath. You can set units for the following channel types (if available):
§ Bandwidt h
§ Memory
§ Disk
§ File
§ Cust om
Note: Custom channel types can be set on sensor level only.
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Edit Sensor Channels
In order to change display settings, spike filter, and limits, please switch to the sensor's
Overview tab and click on the gear icon of a specific channel. For detailed information, please see
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section.
Notifications
Click on the Not ificat ions tab to change notification triggers. For detailed information, please see
Sensor Not ificat ions Set t ings
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section.
Others
For more general information about settings, please see
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section.
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