COMPUTER FUNDAMENTALS

Detailed explanation-1: -node serves as the Slave and is responsible for carrying out the Tasks that have been assigned to it by the JobTracker. Explanation: TaskTracker node serves as the Slave and is responsible for carrying out the Tasks that have been assigned to it by the JobTracker.

Detailed explanation-2: -DataNode: DataNode is the slave node that stores all files and processes. Mapper: Mapper maps data or files in the DataNodes.

Detailed explanation-3: -DataNode: DataNodes are the slave nodes in HDFS. Unlike NameNode, DataNode is a commodity hardware, that is responsible of storing the data as blocks. Secondary NameNode: The Secondary NameNode works concurrently with the primary NameNode as a helper daemon.

Detailed explanation-4: -The MapReduce framework consists of a single master JobTracker and one slave TaskTracker per cluster-node. The master is responsible for scheduling the jobs’ component tasks on the slaves, monitoring them and re-executing the failed tasks.