BasicTableOutputFormat.setOutputPath(job, invIndexTablePath);
BasicTableOutputFormat.setSchema(job, "count:int, index:map()");
job.setNumReduceTasks(options.numReducer);
job.submit();
job.waitForCompletion(true);
BasicTableOutputFormat.close( job );
}
void reduce(Summary sum, Summary delta) {
sum.lineCount += delta.lineCount;