Some applications don’t want files to be split, as this allows a single mapper to process each input file in…
In the real world, user code is buggy, processes crash, and machines fail. One of the major benefits of using…
You can run a mapreduce job with a single method call submit() on a Job object or you can also…
MapReduce makes the guarantee that the input to every reducer is sorted by key. The process by which the system…
Performance issues in a map reduce jobs is a common problem faced by hadoop developers and there are a few hadoop…
Sequence files, map files, and Avro datafiles are all row-oriented file formats, which means that the values for each row…
Serialization is the process of turning structured objects into a byte stream for transmission over a network or for writing…