Thanks for reply. But we have different services for each of them, for example a service for NameNode and a Service for JobTracker, are they doing separate things each one?
On Tue, Jun 29, 2010 at 10:20 PM, Allen Wittenauer <[email protected] > wrote: > > On Jun 29, 2010, at 8:07 AM, Sarah kho wrote: > > > Hi, > > > > Can you please let me know what are tasks that the taskTracker and > > JobTracker performs? > > Pretty much the entirety of the MapReduce framework. You can think of it > this way: > > > HDFS <--> MR > NameNode <--> JobTracker > DataNode <--> TaskTracker
