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cache-map-reduce

Simple Map-Reduce interface implementation for Caché ObjectScript

Map-Reduce is implemented via global-based pipe ("global" here is the name Caché persistent, hierarchical array.

There are several samples of Map-Reduce application, all of them are counting words in the set of input files ("War and Peace" in Russian by Leo Tolstoy):

  • MR.Sample.WordCountMapReduce - count number of words for each file separately;
  • MR.Sample.WordCountMapReduceSum - count words in files and calculate their total sum;
  • MR.Sample.WordCountMapReduceWorkers - count words concurrently, using %SYSTEM.WorkMgr for parallel execution.

The next step - is to use %Net.RemoteConnection for remote execution and coordination.