How to change a number of mappers running on a slave in MapReduce?

541

How much space will the split occupy in Mapreduce?

494

What is a MapReduce Combiner?

611

Why Mapreduce output written in local disk?

707

MapReduce Types and Formats and Setting up a Hadoop Cluster?

708

What is the next step after Mapper or MapTask?

479

What is shuffleing in mapreduce?

450

Define speculative execution?

489

Explain about the basic parameters of mapper and reducer function

888

Is it possible to search for files using wildcards?

467

What are the four basic parameters of a reducer?

456

What is the need of MapReduce in Hadoop?

477

How to set mappers and reducers for MapReduce jobs?

462

Can we submit the mapreduce job from slave node?

922

What is the difference between map and reduce?

444