HistoryServer in Big Data Hadoop

JobTracker or ResourceManager keeps all job information in memory. For finished jobs, it drops them to avoid running out of memory. Tracking of these past jobs are delegated to JobHistory server.

To Start:

$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh start historyserver

To Stop:

$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh stop historyserver