Question

Which protocol is used by namenode for communication with data node?

Answer 1

Answer:

The Communication Protocols

The DataNodes talk to the NameNode using the DataNode Protocol. A Remote Procedure Call ( RPC ) abstraction wraps both the Client Protocol and the DataNode Protocol. By design, the NameNode never initiates any RPCs.

Answer 2

DataNodeProtocol

Explanation:

The DataNodes talk to the NameNode using the DataNode Protocol. A Remote Procedure Call (RPC) abstraction wraps both the Client Protocol and the DataNode Protocol.

By design, the NameNode never initiates any RPCs. Instead, it only responds to RPC requests issued by DataNodes or client

Namenode and datanodes uses RPC to protocol to exchange data between name node and datanodes (HDFS data).

All communication between Namenode and Datanode is initiated by the Datanode, and responded to by the Namenode. The Namenode never initiates communication to the Datanode, although Namenode responses may include commands to the Datanode that cause it to send further communications.

#Learn more:

What is protocol? name any one protocol use on internet

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