A Brief History: MapReduce MapReduce use cases showed two major limitations. difficultly of programming directly in MR 2. performance bottlenecks, or batch not fitting the e use cases In short, Mr doesnt compose well for large applicationsA Brief History: MapReduce MapReduce use cases showed two major limitations: 1. difficultly of programming directly in MR 2. performance bottlenecks, or batch not fitting the use cases In short, MR doesn’t compose well for large applications