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Comic form to explain HDFs

Source: Internet
Author: User
Keywords Nbsp; dfs comparison fault
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&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Distributed file systems are more famous for HDFs and GFS, where HDFs is simpler. This article is a description of the very simple and understandable comic form to explain the principles of HDFs. Much easier to understand than the general PPT. Not rare learning materials.

1, three parts: client, nameserver (can understand master and file index similar to Linux inode), Datanode (storage server that holds actual data)


2, how to write the data process





3. Read the data process

4, fault-tolerant: The first part: fault type and its detection methods (Nodeserver fault, and network failure, and dirty data problems)



5, fault-tolerant Part II: READ-write fault-tolerant

6, fault-tolerant Part III: DataNode failure

7. Backup rules

8. Concluding remarks

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