What is ElasticSearch? Elasticsearch is a search engine based on Lucene. It has a distributed, multitenant-able full-text search engine. Elasticsearch is developed in Java and is released as open source under the terms of the Apache License. What is an index in ElasticSearch? An index is a collection of documents that have somewhat […]
Apache Pig Data Types
Pig datatypes could be categorized into following two categories: Scalar/Simple Complex Scalar Types Complex Types Map: A map in Pig is a chararray to data element mapping, where that element can be any Pig type, including a complex type. The chararray is called a key and is used as an […]
Getting started with MapReduce Programming
In this article, you will learn to write MapReduce program using Java programming language. This program is to just understand the concept of MapReduce programming, which will simply take some input file and same data will be passed through Mappers and Reducer to generate the final output. Pre-Requisites: 1. Eclipse […]