Hadoop, MapReduce & Spark. These are interactive browser demos — no cluster, no setup. Open them full-screen and show them live in class.
▶ Open the Interactive SlidesTrace a sentence through Split → Map → Shuffle & Sort → Reduce. The clearest way to see MapReduce — type your own sentence and step through each phase.
The same iterative job run both ways. Watch Hadoop's disk round-trips pile up while Spark stays in memory — and the speed gap grow as you add iterations.
No installs, no compilers — these run in any modern browser. In production this runs on managed clusters (AWS EMR, Google Dataproc, Databricks) or cloud warehouses (BigQuery, Snowflake).