Thursday, January 18, 2018

5 Daemons of Hadoop




Hadoop is comprised of five separate daemons. Each of these daemon runs in its own JVM.


Daemons run on Master nodes:

NameNode – This daemon stores and maintains the metadata for HDFS.
Secondary NameNode – Performs housekeeping functions for the NameNode.
JobTracker – Manages MapReduce jobs, distributes individual tasks to machines running the Task Tracker.



 Daemons run on Slave nodes:

DataNode – Stores actual HDFS data blocks.
TaskTracker – Responsible for instantiating and monitoring individual Map and Reduce tasks.

4 comments:

  1. Such organizations can set cutoff points on these credit lines by making danger models for low-pay buyers through state, installment chronicles for different utilities or Mastercards.
    Such organizations can set cutoff points on these credit lines by making danger models for low-pay buyers through state, installment chronicles for different utilities or Mastercards.

    machine learning course in pune

    ReplyDelete
  2. Hey!

    DigiPeek is the best SEO & Link Building Service Provider In The World. I have 7+ Years Experience To Build SEO, Backlinks & Improve Website Ranking.

    If you need Profile Backlinks, Forum Backlinks, Dofollow Backlinks, Manual Backlinks, Trusted SEO Backlinks, Increase Domain Rating Then You Will Contact Me.

    I am glad to help You!

    Let's TRY!

    ReplyDelete