This MIB module defines objects that describe collections and measurement information for each sensor supporting historical data collection. The sensor measurement either represents a measured value or a SMA (Simple Moving Average) value for a specified interval rate over a period of time. This MIB module defines two tables relating to sensor measured value, including: o ceshCollectionTable - contains data describing a collection of historic data for a sensor. o ceshCollectionIntervalTable - contains zero or more rows containing historic data for a sensor The figure below illustrates the relationship between these two tables. + | ceshCollectionTable | | + | | ceshCollectionEntry | | | | entPhysicalIndex = 3 | | | | ceshCollectionIntervalTime = 60 | | | | ceshCollectionIntervals = 60 | | | | ceshCollectionInvalidIntervals = 0 | | | ceshCollectionMaxIntervals = 60 | | | | | ceshCollectionElapsedTime = 20 | | | | | ceshCollectionAlgorithm = 3 | | | | + | + | | ceshCollectionEntry | | | | | entPhysicalIndex = 3 | | | | | ceshCollectionIntervalTime = 3660 | | | | | ceshCollectionIntervals = 2 | | | ceshCollectionInvalidIntervals = 0 | | | | | | ceshCollectionMaxIntervals = 60 | | | | | | ceshCollectionElapsedTime = 20 | | | | | | ceshCollectionAlgorithm = 4 | | | | | + + | | + | ceshCollectionIntervalTable | | | | + | | ceshCollectionIntervalEntry | | | | | | entPhysicalIndex = 3 |< | | ceshCollectionIntervalTime = 60 | | | | | | ceshCollectionIntervalNumber = 1 | | | | | | ceshCollectionIntervalSensorValue = 54 | | | | | | ceshCollectionIntervalTimeStamp = 1 | | | | | + | .................... < | skipped 58 entries < | .................... < | | | | | + | | ceshCollectionIntervalEntry | | | | | | entPhysicalIndex = 3 |< | | ceshCollectionIntervalTime = 60 | | | | | ceshCollectionIntervalNumber = 60 | | | | | ceshCollectionIntervalSensorValue = 54 | | | | | ceshCollectionIntervalTimeStamp = 60 | | | | + | | | | + | | ceshCollectionIntervalEntry | | | | | entPhysicalIndex = 3 |< | | ceshCollectionIntervalTime = 3660 | | | | ceshCollectionIntervalNumber = 1 | | | | ceshCollectionIntervalSensorValue = 54 | | | | ceshCollectionIntervalTimeStamp = 60 | | | + + If the system samples a sensor every minute for one collection and every hour for another, then the ceshCollectionTable contains two entries describing the two collections.