ppt1x present
DESCRIPTION
TRANSCRIPT
HadoopEdit 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
128Mb
B64Mb
A64Mb
Check hdfs-site.xml
B64Mb
A64Mb
Hadoop
DataNodeNameNode
MasterDataNode
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
MasterDataNode
Slaves
JobTracker
TaskTracker
Hadoop
•Master
•NameNode
•JobTracker
•SecondaryNameNode
SecondaryNameNode
•What is SecondaryNameNode?
•NameNode 發生錯誤時補救
•Where is SecondaryNameNode?
•Master
Hadoop
DataNodeNameNode
MasterDataNode
Slaves
JobTracker
TaskTracker
SecondaryNode
MapReduce
User Master
Slave2
Slave1
A
A1
A2Task
NameNode
Task
Result1
Result2
Reduce
Final Result
HDFS
MapReduce
•檔案切割
•Hadoop 上區塊切割
•程式指定