Hadoop 130419075715-phpapp02(1)
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This document provides an overview of the Hadoop framework. It describes the key components of Hadoop including the NameNode, DataNodes, JobTracker, TaskTracker, and SecondaryNameNode. The NameNode manages the file system metadata and keeps track of where data is stored across DataNodes. The JobTracker is responsible for scheduling jobs and assigning tasks to TaskTrackers running on slave nodes. The SecondaryNameNode helps recover metadata if the NameNode fails. Hadoop uses a master-slave architecture with the NameNode and JobTracker running on the master and DataNodes and TaskTrackers running on slave nodes.
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Hadoop 130419075715-phpapp02(1)
- 1. Hadoop Edit by Cassell Hsu 2013.04.19
- 3. Hadoop • Master • NameNode • JobTracker • SecondaryNameNode
- 4. 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 ？？
- 5. NameNode • 位置資訊 ? • 所有資料皆存放在 – DataNode
- 6. DataNode • What is DataNode • 存放資料 • Where is DataNode • HDFS • Slaves (and Master)
- 9. Hadoop • Master • NameNode • JobTracker • SecondaryNameNode
- 10. JobTracker • What is JobTracker? • 排程工作 • Where is JobTracker? • Master 誰來工作？
- 11. JobTracker & TaskTracker JobTracker TaskTracker Where Master Slaves What 排程工作 執行工作
- 13. Hadoop • Master • NameNode • JobTracker • SecondaryNameNode
- 14. SecondaryNameNode • What is SecondaryNameNode? • NameNode 發生錯誤時補救 • Where is SecondaryNameNode? • Master
- 17. MapReduce • 案切割檔 • Hadoop 上區塊切割 • 程式指定