Hadoop - What is a Job in Hadoop ?

In the field of computer science , a job just means a piece of program and the same rule applies to the Hadoop ecosystem as wel...

  • Spark - Streaming First Program
    We will write our first code in spark streaming. We will see how data flows on a TCP socket. We will try to read this data and later coun...
  • Oozie - Workflow
    Oozie workflow is a sequence of actions that are in the form of DAG.(Directed acyclic graph).it is a combination of actions a...
  • Pyspark - groupByKey
    groupByKey() operates on Pair RDDs and is used to group all the values related to a given key.It takes (k,v) key , value pair as input and ...