Search

What is a #Broadcast Variacles?



Broadcast variables are variables that are shared throughout the cluster. Broadcast variables need to be able to slot in memory on one machine. which means that they mustn't be something super massive, sort of a massive table or large vector. Secondly, broadcast variables area cannot be changed, which means that they can't be modified.
Posted by at
Labels:
  • What are the main components of Mapreduce Job ?
      Main driver class which provides job configuration parameters. Mapper class which must extend org.apache.hadoop.mapredu...
  • TO_CHAR
       This will be used to extract various date formats.     The available date formats as follows.     Syntax: to_char ( date , fo...