Patent ID: 7725575
Filing Date: 2010-05-25
Classification: G06Q,H04L

Abstract:
1. An unexpected demand detection system for detecting an unexpected demand for IT resources that can be increased/decreased in a computer system including the IT resources, comprising: an event information recording part that records a value indicating a ratio between, with respect to a demand for the IT resources that varies due to occurrence of an event, a demand amount at a time when a peak of the demand is reached and a demand amount at a point in time preceding or following the peak time by a length of a detection margin time correspondingly to a plurality of values indicating steepness of a variation in the demand for the IT resources and a plurality of lengths of the detection margin time; a reference value data recording part that records reference value data indicating a time-based transition in a predetermined time period of a reference value for judging presence or absence of a variation in the demand for the IT resources due to occurrence of an event; a forecast data recording part that records forecast data containing data indicating a value of the steepness of a variation in the demand for the IT resources due to an envisioned event and data indicating a time period in the predetermined time period, in which a peak of the demand for the IT resources that varies due to the envisioned event is reached, and a demand amount at a peak time; a detection period generating part that acquires, using the value of the steepness, the time period in which the peak of the demand is reached, and the demand amount at the peak time that are indicated by the forecast data, a demand amount at a point in time preceding the peak time by a length of the detection margin time from the event information recording part, and performs a comparison between the acquired demand amount and the reference value data thereby to calculate a detection period in which a start of the variation in the demand due to the envisioned event is detected; an observation data input part that inputs observation data indicating an actual demand for the IT resources observed in the predetermined time period; and a judging part that performs a comparison between the actual demand indicated by the observation data and the reference value data so as to detect a start of a variation in the demand due to an event, and performs a comparison between a time period in which the start is detected and the detection period calculated by the detection period generating part thereby to judge whether a demand different from the demand indicated by the forecast data occurs in the predetermined time period.