Hadoop


Hadoop NameNode Automatic Failover 1

1. Objective This article is all about Hadoop NameNode Automatic failover. Here we will cover Introduction to failover in Hadoop. It also covers types of Failover i.e. Graceful Failover and Automatic Failover. The components add by failover in Hadoop HDFS- ZooKeeper quorum, ZKFailoverController Process (ZKFC) are also covered on this blog in detail. 2. What…


Distributed Cache in Hadoop – Introduction, Pros & Cons

1. Objective In our blog about Distributed Cache in Hadoop you can read all about introduction to Hadoop distributed cache, Working and implementations of distributed cache in Hadoop framework. This tutorial also covers various Advantages of Distributed Cache, limitations of Apache Hadoop Distributed Cache. 2. Introduction to Hadoop Apache Hadoop is an open-source software framework.…


13 Big Limitations of Hadoop & Solution To Hadoop Drawbacks

1. Objective Although Hadoop is the most powerful tool of big data, there are various limitations of Hadoop like Hadoop is not suited for small files, it cannot handle firmly the live data, slow processing speed, not efficient for iterative processing, not efficient for caching etc. In this tutorial on limitations of Hadoop, firstly we will…

13 Big Limitations of Hadoop and Ways to solve these limitations.

MapReduce InputSplit vs Block in Hadoop

1. Objective In this InputSplit vs Block tutorial, we will learn what is a block in HDFS, what is MapReduce inputSplit and difference between MapReduce InputSplit vs Block size in Hadoop to deep dive into Hadoop fundamentals. 2. MapReduce InputSplit & HDFS Block - Introduction Let us start with learning what is a block in…

inputSplit vs Block

Hadoop Mapper – What is Mapper in Hadoop MapReduce?

1. Objective Mapper task is the first phase of processing that processes each input record (from RecordReader) and generates an intermediate key-value pair. Hadoop Mapper store intermediate-output on the local disk. In this Hadoop mapper tutorial, we will try to answer what is a mapper in MapReduce, how to generate key-value pair in Hadoop, what is…

Introduction to Hadoop mapper and its working in MapReduce.