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

695

In Map Reduce why map write output to Local Disk instead of HDFS?

903

Explain about the partitioning, shuffle and sort phase in MapReduce?

819

What is Text Input Format?

676

What is LazyOutputFormat in MapReduce?

684

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

600

Define MapReduce?

696

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

668

What is Hadoop Map Reduce ?

805

What is Counter in MapReduce?

676

What do you mean by inputformat?

612

When Namenode is down what happens to job tracker?

699

What is a partitioner and how the user can control which key will go to which reducer?

939

Explain the input type/format in mapreduce by default?

579

Explain the difference between a MapReduce InputSplit and HDFS block?

658