My bar

136 views
109 views

Published on

Published in: Health & Medicine
0 Comments
0 Likes
Statistics
Notes

Comments are closed

  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
136
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

My bar

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

×