PRTG Manual: Folder Sensor

The Folder sensor monitors a folder via Server Message Block (SMB). You can monitor file changes and file ages.

Folder Sensor

Folder Sensor

i_square_cyanFor a detailed list and descriptions of the channels that this sensor can show, see section Channel List.

Sensor in Other Languages

  • Dutch: Map
  • French: Dossier
  • German: Ordner
  • Japanese: フォルダー
  • Portuguese: Pasta
  • Russian: Папка
  • Simplified Chinese: 文件夹
  • Spanish: Carpeta

Remarks

  • This sensor has a high performance impact. Use it with care. We recommend that you use no more than 200 sensors of this sensor type on each probe.

i_podYou cannot add this sensor to the hosted probe of a PRTG Hosted Monitor instance. If you want to use this sensor, add it to a remote probe device.

Detailed Requirements

Requirement

Description

LanmanServer service

To monitor shares on Windows machines, make sure that the LanmanServer service runs on the target computer.

i_round_blueThe display name of the service is Server.

To enable the service, log in to the respective computer and open the services manager (for example, via services.msc). In the list, find the respective service and set its Start Type to Automatic.

Add Sensor

The Add Sensor dialog appears when you manually add a new sensor to a device. It only shows the settings that are required to create the sensor. You can change nearly all settings on the sensor's Settings tab after creation.

Folder Monitor

Setting

Description

File Age Check

Specify if the sensor monitors the folder for certain file ages and shows a corresponding status:

  • Do not check: Do not check the age of the files in the folder:
  • Show warning status if older: Set the sensor to the Warning status if one of the files in the folder is older than a specific limit unit.
  • Show down status if older: Set the sensor to the Down status if one of the files in the folder is older than a specific limit unit.
  • Show warning status if younger: Set the sensor to the Warning status if one of the files in the folder is younger than a specific limit unit.
  • Show down status if younger: Set the sensor to the Down status if one of the files in the folder is younger than a specific limit unit.

i_round_blueYou can change the file age check later via the Limits section in the channel settings of Newest File and Oldest File.

File Age Limit

This setting is only visible if you select a file age check above. Enter the age of a file in the folder that triggers the sensor status change if the age falls below a specific value or if it is exceeded. Enter an integer. Define the limit unit below.

File Age Limit Unit

This setting is only visible if you select a file age check above. Specify the unit for the file age value:

  • Days: Select this option if the File Age Limit is a number of days.
  • Hours: Select this option if the File Age Limit is a number of hours.
  • Minutes: Select this option if the File Age Limit is a number of minutes.

Basic Sensor Settings

Click the Settings tab of a sensor to change its settings.

Basic Sensor Settings

Basic Sensor Settings

Setting

Description

Sensor Name

Enter a name to identify the sensor.

Parent Tags

Shows tags that the sensor inherits from its parent device, parent group, and parent probe.

i_round_blueThis setting is for your information only. You cannot change it.

Tags

Enter one or more tags. Confirm each tag with the Spacebar key, a comma, or the Enter key. You can use tags to group objects and use tag-filtered views later on. Tags are not case-sensitive. Tags are automatically inherited.

i_round_blueIt is not possible to enter tags with a leading plus (+) or minus (-) sign, nor tags with parentheses (()) or angle brackets (<>).

i_round_blueFor performance reasons, it can take some minutes until you can filter for new tags that you added.

The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:

  • foldersensor

Priority

Select a priority for the sensor. This setting determines the position of the sensor in lists. The highest priority is at the top of a list. Choose from the lowest priority (i_priority_1) to the highest priority (i_priority_5).

Folder Monitor

Folder Monitor

Folder Monitor

Setting

Description

Folder Name

Enter the full path to the folder this sensor monitors. For example, enter C:\Windows.

If the file is located on a network device, use the Universal Naming Convention (UNC) path without the server part (only enter share\folder). The server part (\\server\) is taken from the parent device settings of this sensor. Enter a valid path name.

i_round_redTo monitor Windows shares, the LanmanServer service must run on the target computer.

Recurse Subfolders

Specify if the sensor includes subfolders in the folder monitoring:

  • Do not recurse subfolders: Only monitor the folder. Do not monitor its subfolders.
  • Monitor the folder and its subfolders (recursive): Monitor the folder and all of its subfolders.
    i_round_redIf you recurse subfolders in large directories that have a high number of branches, this may cause timeout errors or performance issues.

If Folder Contents Change

Specify if the sensor sends a notification when the content of the folder changes:

  • Ignore changes: Changes to the folder do not trigger a notification.
  • Trigger 'change' notification: The sensor triggers a notification if a file changes its time stamp or file name, or if there are new or deleted files. Create a change trigger on the Notification Triggers tab of this sensor to receive a notification whenever there is a change.

Timeout (Sec.)

Enter a timeout in seconds for the request. Enter an integer. The maximum timeout value is 900 seconds (15 minutes).

i_round_blueIf the reply takes longer than this value, the sensor cancels the request and shows a corresponding error message.

Debug Options

Debug Options

Debug Options

Setting

Description

Result Handling

Define what PRTG does with the sensor result:

  • Discard result: Do not store the sensor result.
  • Store result: Store the last sensor result in the \Logs\sensors subfolder of the PRTG data directory on the probe system. The file names are Result of Sensor [ID].txt and Result of Sensor [ID].Data.txt. This setting is for debugging purposes. PRTG overwrites these files with each scanning interval.

i_round_blueIn a cluster, PRTG stores the result in the PRTG data directory of the master node.

Sensor Display

Sensor Display

Sensor Display

Setting

Description

Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, the last value of the primary channel is always displayed below the sensor's name. The available options depend on what channels are available for this sensor.

i_round_blueYou can set a different primary channel later by clicking b_channel_primary below a channel gauge on the sensor's Overview tab.

Graph Type

Define how different channels are shown for this sensor:

  • Show channels independently (default): Show a graph for each channel.
  • Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
    i_round_redYou cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings).

Stack Unit

This setting is only visible if you enable Stack channels on top of each other as Graph Type. Select a unit from the list. All channels with this unit are 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.

Inherited Settings

By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click b_inherited_enabled under the corresponding setting name to disable the inheritance and to display its options.

i_square_cyanFor more information, see section Inheritance of Settings.

Scanning Interval

Scanning Interval

Scanning Interval

i_square_cyanFor more information, see section Root Group Settings, section Scanning Interval.

Schedules, Dependencies, and Maintenance Window

i_round_blueYou cannot interrupt the inheritance for schedules, dependencies, and maintenance windows. The corresponding settings from the parent objects are always active. However, you can define additional schedules, dependencies, and maintenance windows. They are active at the same time as the parent objects' settings.

Schedules, Dependencies, and Maintenance Window

Schedules, Dependencies, and Maintenance Window

i_square_cyanFor more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.

Access Rights

Access Rights

Access Rights

i_square_cyanFor more information, see section Root Group Settings, section Access Rights.

Channel Unit Configuration

i_round_blueWhich channel units are available depends on the sensor type and the available parameters. If no configurable channels are available, this field shows No configurable channels.

Channel Unit Configuration

Channel Unit Configuration

i_square_cyanFor more information, see section Root Group Settings, section Channel Unit Configuration.

Channel List

i_round_blueWhich channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.

Channel

Description

Downtime

In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status in percent.

Execution Time

The execution time in milliseconds (msec)

File Count

The number of files in the folder

i_round_redThe sensor counts all files in a folder, including hidden files.

Folder Size

The folder size in bytes

i_round_blueThis channel is the primary channel by default.

Newest File

The time since the newest modification of a file in the folder (newest file)

i_round_blueThe sensor shows a negative value if the date of a modified file is in the future.

Oldest File

The time since the oldest modification of a file in the folder (oldest file)

More

i_square_blueKnowledge Base

What can I do if PRTG doesn't succeed with monitoring a share? PE029 PE032

What security features does PRTG include?