Two dimensional time-series for anomaly detection and regulation in adaptive systems

A two dimensional time approach is introduced in order to classify a periodic, adaptive threshold for service level anomaly detection. An iterative algorithm is applied to history analysis on this periodic time to provide a the smooth roll-off in the significance of the data with time. The algorithm described leads to an approximately ten-fold compression in data storage, and thousand fold improvement in computation cycles, compared to a naive time-series approach. The behaviour of this anomaly detector is discussed, and the result is implemented in cfengine for direct use in system management.