Aggregation in MapReduce

Note

This feature is only available in NCache Enterprise Edition.

NCache 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.

Along with providing a built-in aggregator, NCache also allows implementing and using custom Aggregator.

In This Section

Aggregator (MapReduce) Components and Working
Explains in detail the working of Aggregator.

Aggregator Implementation and Usage
Provides samples to implement Aggregator interfaces for custom logic and use it in code.