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.

Earn bitcoins upto $250 (free), invest in other Cryptocurrencies when you signup with blockfi. Use the referral link: https://blockfi.com/?ref=f2ab78ba

Using BlockFi, don't just buy crypto - start earning on it. Open an interest account with up to 8.6% APY, trade currencies, or borrow money without selling your assets.

Invest now!!! Get Free equity stock (US,UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.