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Aurelio, System Admin at Paessler AG

With PRTG you can detect relationships between different components in your network. This function is called similar sensors analysis , a heuristic calculation that shows similar behavior in your sensors. The analysis is completely automated and sensor type agnostic. It is based on mathematics and fuzzy logic. This feature helps you find interconnections in your network that you were not aware of and optimizes your sensor usage by tracking redundant monitoring of some aspects of your system.

You can adjust the depth of similar sensors analysis or turn it off in System Administration—Monitoring . You can also enable or disable the similarity analysis for specific probes, groups, and devices and specify inheritance in the corresponding object settings, section Automatic Monitoring Analysis .

There are two options to view similar sensors:

  • The overview page of sensors contains a similar sensors section. PRTG lists channels there that show similarities to channels of the current sensor.
  • In addition, you can call a similar sensors overview page via Sensors | Similar Sensors Overview from the main menu.

Similar Sensors (Sensor Overview Tab)

Probe, group, device, and sensor pages have tabs that you can use to navigate between the different options. For example, you can view your network's status, view monitoring results, or change settings.

Tabs Bar on Sensor PagesTabs Bar on Sensor Pages

On the overview tab of a sensor, PRTG lists channels that show similarities to channels of the currently selected sensor. The table is empty if PRTG detects no similarities regarding the selected sensor.

icon-i-round PRTG only shows similar sensors here when channels have at least 85% similarity. Furthermore, the analysis saves up to 15 entries per sensor at most.

Similar Sensors Section on a Sensor's Overview TabSimilar Sensors Section on a Sensor's Overview Tab

The similar sensors section provides the following information:

Similar Sensors

Similarity

Shows a measurement of similarity between two channels in percent.

Channel

Shows a channel of the currently selected sensor.

Similar Channel

Shows a channel of another sensor similar to a channel of the currently selected sensor (the one in the "Channel" column in the same row).

icon-i-round PRTG does not show the similar sensors section when the analysis is off or when you have exceeded 1,000 sensors and selected the automatic analysis depth option. You will see a notice in this case.

Similar Sensors Overview (Sensors Menu)

This page shows the results of the similar sensors analysis from the entire monitoring database. PRTG lists all channels with similarities to another one here. On the table top, you have several filter options to display similar sensors as you need it. Choose the object of interest, the degree of similarity, and if you want to display back references. For more details, see also section Working with Table Lists .

icon-i-round PRTG only shows similar sensors here when channels have at least 85% similarity. Furthermore, the analysis saves up to 15 entries per sensor at most.

Similar Sensors OverviewSimilar Sensors Overview

You can sort the list by clicking the column headers. The similar sensors overview page provides the following information:

Similar Sensors Overview

Original Channel

Shows channels that other channels are compared to. Click the column header to sort the list according to the order in the device tree in ascending or descending order.

Similarity

Shows a measurement of similarity between two channels in percent. Click the column header to sort the list according to the similarities in ascending or descending order.

Similar Channel

Shows a channel compared to the original channel. Click the column header to sort the list according to the order in the device tree in ascending or descending order.

Compare Sensors

Click Data Comparison to compare graphs of two or more monitoring objects.
icon-book-arrows Please see section Similar Sensors for more information on comparing sensors.

Item Count

Define how many channel similarities are shown on this page. Choose between 50, 100, or 500.

icon-i-round PRTG does not show the similar sensors overview option in the main menu if you turned off the analysis or if you have exceeded 1,000 sensors and selected the automatic analysis depth option.

 

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