NCache 4.6 - Online Documentation


The Aggregator has been built upon the MapReduce framework and processes distributed data records to return compiled and statistical results. As the name indicates, the Aggregator is used to perform an operation over a range of values to produce a small number of results for analytical purposes. In other words, NCache’s built-in Aggregator is essentially a MapReduce Task, but with a broader set of Aggregation operations. Note that the users can also implement their own Aggregator if required.
The Aggregator basically converts the input data from multiple sources into meaningful key-value pairs and can perform a variety of mathematical operations like summing up values, calculating averages, finding minimum/maximum values etc. to return a single result.
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