③ Motivation Large-scale data processing Want to use 1000s of Cpus But don t want hassle of managing things Mapreduce provides Automatic parallelization e distribution fault tolerance Monitoring &t status updatesMotivation 3 • Large-Scale Data Processing – Want to use 1000s of CPUs – But don’t want hassle of managing things • MapReduce provides – Automatic parallelization & distribution – Fault tolerance – I/O scheduling – Monitoring & status updates