Ntb0e5xqqjihzzxh3bit 140416002604-phpapp02
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Ntb0e5xqqjihzzxh3bit 140416002604-phpapp02 Ntb0e5xqqjihzzxh3bit 140416002604-phpapp02 Presentation Transcript

  • 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 128 Mb 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
  • SecondaryNameNo de • 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 Maste r Slave 2 Slave1 A A1 A2 Task NameNod e Task Resul t1 Resul t2 Reduc e Final Result HDFS
  • MapReduce • 檔案切割 • Hadoop上區塊切割 • 程式指定