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Hadoop Architecture and Components Explained

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Nitish Bhardwaj
Nitish Bhardwaj
BusinessTechnology
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Hadoop Edit by Cassell Hsu 2013.04.19
Hadoop Master Slave Slave Slave
Hadoop • Master • NameNode • JobTracker • SecondaryNameNode
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 ？？
NameNode • 位置資訊? • 所有資料皆存放在 – DataNode
DataNode • What is DataNode • 存放資料 • Where is DataNode • HDFS • Slaves (and Master)
User DataNode NameNode DataNode DataNode 12 8M b B 64Mb A 64Mb Check hdfs-site.xml B 64Mb A 64Mb
Hadoop DataNodeNameNode Master DataNode DataNode DataNode Slaves
Hadoop • Master • NameNode • JobTracker • SecondaryNameNode
JobTracker • What is JobTracker? • 排程工作 • Where is JobTracker? • Master 誰來工作？
JobTracker & TaskTrackerJobTracker TaskTracker Where Master Slaves What 排程工作 執行工作
Hadoop DataNodeNameNode Master DataNode Slaves JobTracker TaskTracker
Hadoop • Master • NameNode • JobTracker • SecondaryNameNode
SecondaryNameNod e • What is SecondaryNameNode? • NameNode發生錯誤時補救 • Where is SecondaryNameNode? • Master
Hadoop DataNodeNameNode Master DataNode Slaves JobTracker TaskTracker SecondaryNode
MapReduce User Master Slave2 Slave1 A A1 A2 Task NameNode Task Result 1 Result 2 Reduc e Final Result HDFS
MapReduce • 檔案切割 • Hadoop上區塊切割 • 程式指定

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Hadoop Architecture and Components Explained