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This article mainly introduces the example analysis of HDFS architecture, the article is very detailed, has a certain reference value, interested friends must read it!

1. NameNode (nn): the manager of the Hdfs cluster, Master

A. Maintain and manage the namespace of Hdfs (NameSpace)

B. Maintenance copy policy

C. Record the mapping information of the file block (Block)

D. Responsible for processing client read and write requests

2. DataNode:NameNode issues commands, DataNode performs actual operations, and Slave nodes.

A. Save the actual data block

B. Responsible for reading and writing data blocks

3. Client: client

A. When uploading a file to HDFS, Client is responsible for splitting the file into Block, and then uploading it.

B. Request NameNode interaction to get the location information of the file

C, read or write files, interact with DataNode

D, Client can use some commands to manage HDFS or access HDFS

The above is all the content of the article "sample Analysis of HDFS Architecture". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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