Un-Answered Questions { MapReduce }

Illustrate a simple example of the working of MapReduce.

380


For a Hadoop job, how will you write a custom partitioner?

391


what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

413


what is the Hadoop MapReduce APIs contract for a key and value class?

410


When is it suggested to use a combiner in a MapReduce job?

387


What is the process of changing the split size if there is limited storage space on Commodity Hardware?

408


how Hadoop is different from other data processing tools?

380


List the configuration parameters that have to be specified when running a MapReduce job.

364


what is a sequence file in Hadoop?

411


What are the key differences between Pig vs MapReduce?

354


When is it not recommended to use MapReduce paradigm for large

367


what happens in textinformat ?

395


Explain the differences between a combiner and reducer

379


What is a TaskInstance?

397


What is the default input type in MapReduce?

387