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- 4. NameNode
• Where is NameNode?
• Master
• HDFS(Hadoop Distributed File System)
• What is NameNode?
• 資料之位置資訊
??
• 資料之屬性
- 6. DataNode
• What is DataNode
• 存放資料
• Where is DataNode
• HDFS
• Slaves (and Master)
- 16. MapReduce
HDFS Final Result
User Master
Reduce
Slave1
Slave2
A
A1
A2
Task
NameNode
Task
Result1
Result2