Monday, November 25, 2013

Hadoop

 

image

Job Tracker node

  • one per hadoop cluster
  • Receives job requests from client
  • Scheules and monitors MapReduce jobs on task trackers

Task Tracker

  • Many per hadoop cluster
  • Executes MapReduce operations

NameNode

  • save the HDFS file system in memory
  • understand which block is on which data node

DataNode

  • Save Data blocks

 

image

No comments:

Post a Comment