When mapred.job.tracker is set to local (default value) or hive.exec.submitviachild is set to true, MapRedTask instance is used. Otherwise ExecDriver instance is used.
Please refer to trunk\ql\src\java\org\apache\hadoop\hive\ql\exec\TaskFactory.java On Tue, Mar 30, 2010 at 2:16 AM, Jan Stöcker <[email protected]> wrote: > Hi, > > could someone help me with a question to better understand how Hive > interacts with Hadoop? > I understood that for each Map/Reduce-Job Hive wants to get done, it > creates one instance of "Task", which can either be a MapRedTask or an > ExecDriver. On what does it depend which of the two it is? > > Thanks, > Jan > >
