Pptx present
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Hadoop Edit by Cassell Hsu 2013.04.19
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Transcript of Pptx present
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
??
SecondaryNameNode
•What is SecondaryNameNode?
•NameNode 發生錯誤時補救
•Where is SecondaryNameNode?
•Master
MapReduce
User Master
Slave2
Slave1
A
A1
A2Task
NameNode
Task
Result1
Result2
Reduce
Final Result
HDFS