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Ntb0e5xqqjihzzxh3bit 140416002604-phpapp02-140416020154-phpapp02
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Hadoop Edit by Cassell Hsu 2013.04.19
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Transcript of Ntb0e5xqqjihzzxh3bit 140416002604-phpapp02-140416020154-phpapp02
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
??
UserUser
DataNodeDataNode
NameNodeNameNode
DataNodeDataNode
DataNodeDataNode
128Mb
B64Mb
A64Mb
Check hdfs-site.xml
B64Mb
A64Mb
Hadoop
DataNodeDataNodeNameNodeNameNode
MasterDataNodeDataNode
DataNodeDataNode
DataNodeDataNode
Slaves
Hadoop
DataNodeDataNodeNameNodeNameNode
MasterDataNodeDataNode
Slaves
JobTrackerJobTracker
TaskTrackerTaskTracker
Hadoop
DataNodeDataNodeNameNodeNameNode
MasterDataNodeDataNode
Slaves
JobTrackerJobTracker
TaskTrackerTaskTracker
SecondaryNodeSecondaryNode