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How To Setup Hadoop SSH Configuration In Linux CentOs

How To Setup Hadoop SSH Configuration In Linux CentOs

Hadoop requires SSH access to manage its nodes, i.e. remote machines plus your local machine if you want to use Hadoop on it (which is what we want to do in this short tutorial). For our single-node setup of Hadoop, we therefore need to configure SSH access to localhost for the hduser user we created in the previous section.

I assume that you have SSH up and running on your machine and configured…

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Commissioning and Decommissioning Nodes in a Hadoop Cluster

Commissioning and Decommissioning Nodes in a Hadoop Cluster

One of the best Advantage in Hadoop is commissioning and decommissioning nodes in a hadoop cluster,If any node in hadoop cluster is crashed then decommissioning is useful suppose we want to add more nodes to our hadoop cluster then commissioning concept is useful.one of the most common task of a Hadoop administrator is to commission (Add) and decommission (Remove) Data Nodes in a Hadoop Cluster.

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Apache Spark Tutorial for beginners

Apache Spark Tutorial for beginners

Apache Spark is a open source processing engine.Apache Spark is a fast and general engine for large-scale data processing.Spark is a lightning-fast cluster computing designed for fast computation.

Apache spark:

Streaming Data

Apache Spark’s key use case is its ability to process streaming data. With so much data being processed on a daily basis, it has become essential for companies to be able to…

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what is hadoop

What is Hadoop : Hadoop is one of the trending technology in IT market because the reason is Big data,Yes big data is a problem and Hadoop is a solution of that problem.Before going to what is hadoop concept first of all we have to know what is Big dataand what are the main reasons to increase the data by data in this today world.I will show you some scenarios to you all after understanding this…

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Hadoop Definition and Ecosystems

Hadoop Definition and Ecosystems

Hadoop

Hadoop is one of the powerful technology in today Market,Hadoop is an open source and specially designed for commodity hardware and it is open source,java based frame work  that supports both storage purpose and processing purpose. Hadoop is especially designed for large data sets in distributed computing environment. Apache Hadoop is a part of Apache foundation.

In this Internet world…

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Hadoop Tutorial For Beginners Mobile Apps

Hadoop Tutorial For Beginners Mobile Apps

Hadoop Tutorial For Beginners Mobile Apps : Hadoop Technology is one of the trending technology in today IT market.Every IT software Engineer understood the importance of hadoop technology and they all are converting to Big data hadoop technology.Here is we are proudly releasing hadoop interview questions pocket Android App.here is the full details for Hadoop Tutorial For Beginners Mobile Apps .

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Hadoop Interview Questions and Answers For experienced Pdf

Hadoop Interview Questions and Answers For experienced Pdf

Hadoop Interview Questions and Answers For experienced Pdf : Now a days Hadoop technology is one of the trending technology in IT market.In this internet computer world Every business is depending on their business related data and generating relating data again processing the data finally predicting the future results based on the previous data.In this competition world  every business is based…

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Cassandra, Apache Cassandra & It's Database Db

Cassandra, Apache Cassandra & It’s Database Db

Apache Cassandra is one type of Nosql database.Cassandra Database was open source ed by Facebook in July 2008.Cassandra database original version written by an ex employees of Amazon and one from Microsoft . Cassandramainly influenced by Amazon Dynamo db and google big table. Apache Cassandra is highly scalable and high performance distributed database designed to handle large amount of data…

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Spark SQL Tutorial Introduction

Spark SQL Tutorial Introduction

Spark SQL Tutorial Introduction : Spark SQL is one of the main ecosystem on Apache Spark.It almost same as Hive but some new advantages are added to this Apache Spark SQL.Spark’s interface for working with structured and semi structured data. Structured data is any data that has a schema—that is, a known set of fields for each record. When you have this type of data, Spark SQLmakes it both easier…

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Spark RDD Partition and Spark RDD Architecture

Spark RDD Partition and Spark RDD Architecture

Spark RDD Partition and Spark RDD Architecture : In Our Previous Post we discussed about Apache Spark Introduction,Advantages and Disadvantages of Apache Spark and Most asked Apache Spark interview questions and answers for Experienced and Freshers and now we are discussing about one of the Main topic in Spark core is Spark RDD Partition and Spark RDD Architecture.In this Post we will discuss…

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Apache Spark Supported File Systems

Apache Spark Supported File Systems

Apache Spark Supported File Systems :Apache Spark is one of the trending technology in today IT industry.Apache Spark supports many file systems to process data.File Systems supported by Apache spark described below.Here is complete details about Apache Spark Supported File Systems .

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Advantages and Disadvantages of Apache Spark

Advantages and Disadvantages of Apache Spark

Advantages and Disadvantages of Apache Spark: Apache Spark is one of the Trending project in Apache Foundation From last two years so many hadoop projects are moving from Mapreduce to Apache Spark side because Apache Spark overcome the some main problems in Mapreduce.Now Lets us discuss about Advantages and Disadvantages of Apache Spark .

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Apache Spark interview questions and answers for Experienced and Freshers

Apache Spark interview questions and answers for Experienced and Freshers

Apache Spark interview questions Apache Spark is one of the trending project in Apache organisation.From Last two years so many companies are moving their projects from Mapreduce framework to Apache Spark.Apache Spark is extension of Mapreduce Model. Here we Providing Most asked interview Question on Spark.Here is the list of Apache Spark interview questionsand answers for Experienced and…

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When To Use External Table And Internal Table In Hive

When To Use External Table And Internal Table In Hive

We can create table in hive in two different approaches,one approach is hive external table and another approach is hive managed table.In this post we explained the detailed information about Hive create table and real time examples of hive create tables. Here is the two types of hive table .

i) Hive External Table

ii) Hive Managed Table

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How Yahoo Using Hadoop In Real Time

How Yahoo Using Hadoop In Real Time

Yahoo is one of the top search engine website in now a days internet world,After google search engine Yahoo is the best search engine.Yahoo also providing so many services to the users and developing so many applications for business intelligence by using so many technologies.Hadoop is one of the major using technology in Yahoo.Now in this posting i will explain about  How Yahoo Using Hadoop In…

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Sqoop Import

SQOOP IMPORT:

The sqoop import tool imports individual tables from RDBMS to HDFS.Sqoop import tool takes data from RDBMS with four mappers by default,to HDFS.In the process of importing sqoop provides java classes and jar file.

Sqoop  import <——->  either Database(tables) or Mainframe(datasets)

sqoop import

  Sqoop tool ‘import’ is used to import table data from the table to the Hadoop file…

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Apache Sqoop Introduction

RDBMS is the one of the source to genereate GB’s of data.This Big Data storages and analyzers such as MapReduce, Hive, HBase, Cassandra, Pig,Sqoop,etc. of the Hadoop ecosystem came into picture, they required a tool to interact with the relational database servers for importing and exporting the Big Data residing in them.

Here is description about apache sqoop introduction.It is introduced by clo…