Extended Monitoring Guide
The ZenHoltWinters ZenPack adds the ability to create threshold events when a device exceeds cyclical predicted values. The Holt-Winters exponential smoothing algorithm is used for this prediction.
For more information on RRD and Holt-Winters, see the rrdcreate command for more information.
Warning
Zenoss relies on the existence of Holt-Winters RRAs within an RRD file. After adding Holt-Winters thresholds the RRD files will need to be re-created so that the new configuration can occur. You will have to remove any existing RRD files so that new files can be created.
Removing RRD files will remove all historical information associated with these RRD files.