Help the world stop coronavirus! Stay home!

Prev Next

BigData / Hadoop basics

What is DataNode?

DataNode is a commodity hardware which actually stores the data and performs file-level operations as suggested by the NameNode. DataNode sends the signals to NameNode for its status. If DataNode is not able to send heartbeats to the NameNode than Name node marked particular DataNode as dead.

  • Slave daemons.
  • Serves read/write request from the client.
  • Stores actual data.

❤Cash Back At Stores you Love !!!❤

Earn your $10 reward when you make your first purchase through Ebates by signing up with clicking below button.

Ebates Coupons and Cash Back

More Related questions...

Show more question and Answers...

Hadoop MapReduce

Comments & Discussions