How Many Daemon Processes Run On A Hadoop System?

1.	How Many Daemon Processes Run On A Hadoop System?
Answer» Hadoop is comprised of FIVE separate daemons. Each of these daemon run in its own JVM.Following 3 Daemons run on Master nodes NAMENODE : This daemon stores and MAINTAINS the metadata for HDFS. Secondary NameNode : Performs housekeeping functions for the NameNode. JobTracker : Manages MapReduce jobs, distributes individual tasks to machines running the Task Tracker. Following 2 Daemons run on each Slave nodes DataNode : Stores actual HDFS data blocks. TaskTracker : Responsible for instantiating and monitoring individual MAP and Reduce tasks. Hadoop is comprised of five separate daemons. Each of these daemon run in its own JVM.Following 3 Daemons run on Master nodes NameNode : This daemon stores and maintains the metadata for HDFS. Secondary NameNode : Performs housekeeping functions for the NameNode. JobTracker : Manages MapReduce jobs, distributes individual tasks to machines running the Task Tracker. Following 2 Daemons run on each Slave nodes DataNode : Stores actual HDFS data blocks. TaskTracker : Responsible for instantiating and monitoring individual Map and Reduce tasks.

Answer»

Hadoop is comprised of FIVE separate daemons. Each of these daemon run in its own JVM.Following 3 Daemons run on Master nodes

NAMENODE : This daemon stores and MAINTAINS the metadata for HDFS.

Secondary NameNode : Performs housekeeping functions for the NameNode.

JobTracker : Manages MapReduce jobs, distributes individual tasks to machines running the Task Tracker.

Following 2 Daemons run on each Slave nodes

DataNode : Stores actual HDFS data blocks.

TaskTracker : Responsible for instantiating and monitoring individual MAP and Reduce tasks.

Hadoop is comprised of five separate daemons. Each of these daemon run in its own JVM.Following 3 Daemons run on Master nodes

NameNode : This daemon stores and maintains the metadata for HDFS.

Secondary NameNode : Performs housekeeping functions for the NameNode.

JobTracker : Manages MapReduce jobs, distributes individual tasks to machines running the Task Tracker.

Following 2 Daemons run on each Slave nodes

DataNode : Stores actual HDFS data blocks.

TaskTracker : Responsible for instantiating and monitoring individual Map and Reduce tasks.

Discussion