New Beta available: PRTG V6.0.6 adds Aggregate Graphing

How to create Aggregation Sensors

First you have to set up all the individual sensors that you later want to combine into an aggregation sensor. Then simply click the "Add Sensor" button in PRTG's Windows GUI and select "Aggregation Sensor" from the list of available sensor types. On the following page you must enter a name for the sensor and then choose whether you want to work with delta sensors (e.g. traffic sensors) or gauge sensors (e.g. CPU loads). PRTG then shows you a list of available sensors and their channels. Now enable the checkboxes for the desired sensors and click next to finalize the sensor creation.

Working with Aggregation Sensors

As soon as you have created an Aggregation Sensor you can use it in PRTG's Web and Windows GUI just like any other sensor (with some minor exceptions, see below). Double click the sensor in the sensor list to edit the sensor: Here you can add and remove channels from the aggregation. And you can add additional channels with another set of sensors, too.

Notes and Limitations

There are some limitations for aggregation sensors:

• One aggregation sensor can only work with either delta or gauge sensors.
• All channels used for an Aggregation Sensor should use the same unit setting (otherwise the generic unit "#/unknown" will be used).
• If you need the results of multiple Aggregation Sensors in one graph you must set up a custom graph.
• If delta sensors are used for aggregation:
  • The scanning interval for the Aggregation Sensor must be at least three times the maximum scanning interval of the source sensors. The multiplier should always be an integer value (3 or higher).
  • It is recommended that all source sensors should have the same scanning interval setting (e.g. 10 seconds sensor intervall and 30 seconds aggregation scanning, or 20 seconds & 60 seconds).
  • Aggregated delta sensors ignore overflow values (see High Compatibility Mode).
• If gauge sensors are used for aggregation:
  • The scanning interval for the Aggregation Sensor should be the same as the scanning interval of all source sensors.
  • It is recommended that all source sensors should have the same scanning interval setting.
• Due to timing and rounding effects you may see small discrepancies when comparing aggregation sensors with their source channels.
• You can not re-use Aggregation Sensors to create another aggregation Sensor (folding).
• There is no sum channel for the aggregated sensor.
• In the graphs the data lines for Aggregation Sensors appear slightly shifted to the right (=later) compared to the data lines of the source channels because the aggregation sensor reads the data from the other sensors after they have aquired it, which creates a delay.

This latest beta is available from the PRTG download page.