Hadoop Tutorial

What is MapReduce in Hadoop? MapReduce  is the one of the processing tool of Hadoop and it processing large amount of data.It divides a main tasks into subtasks and it processing at parallel.Programmers are written program at MapReduce and its automattically parallelized.Mapreduce having one component called driver and it used to initializing job to mapreduce.MapReduce contains follwing tasks 1.Map 2.Reduce Click Here to Read Full Article

Hadoop Cluster Architecture and Core Components What is Hadoop Cluster? Cluster means Many Computers are worked together as one system.Hadoop Cluster means Computer Cluster used at Hadoop. Hadoop Cluster Mainly designed for storing large amount of unstructed data in Distributed file systems. It referred as “Shared Nothing” Systems and shared data between nodes. Hadoop Clusters are Arranged in racks and it having three nodes which is worker node,master node and Client nodes. Hadoop Cluster Architecture: Hadoop Cluster Having 110 racks and that racks having slave machines. One Rack Switch are placed on top of the Each rack Slave Machines are connected as cables which connected on rack switch. Rack Switch contains 80 Ports NameNode and Job tracker of hadoop cluster are refered as slaves only. Components of Hadoop: Hadoop Cluster has three core Components Client Master Slave Client: Main purpose of Client are submitted the Ma...