Apache Solr – Updating Data
Updating the Document Using XML Following is the XML file used to update a field in the existing document. Save this in a file with the name update.xml. <add> <doc> <field…
Spark SQL – Inferring the Schema using Reflection
This method uses reflection to generate the schema of an RDD that contains specific types of objects. The Scala interface for Spark SQL supports automatically converting an RDD containing case…
Network Security – Data Link Layer
We have seen that the rapid growth of the Internet has raised major concerns for network security. Several methods have been developed to provide security in the application, transport, or…
Sqoop – Import All Tables
In this we will describes how to import all the tables from the RDBMS database server to the HDFS. Each table data is stored in a separate directory and the…
Sqoop – Import
In this we will describes how to import data from MySQL database to Hadoop HDFS. The ‘Import tool’ imports individual tables from RDBMS to HDFS. Each row in a table…
Spark SQL – DataFrames & Data Sources
A DataFrame is a distributed collection of data, which is organized into named columns. Conceptually, it is equivalent to relational tables with good optimization techniques. A DataFrame can be constructed…
Apache Solr – Adding Documents (XML)
In the previous chapter, we explained how to add data into Solr which is in JSON and .CSV file formats. In this chapter, we will demonstrate how to add data…
Apache Solr – Indexing Data
In general, indexing is an arrangement of documents or (other entities) systematically. Indexing enables users to locate information in a document. Indexing collects, parses, and stores documents.Indexing is done to increase the…
Sqoop – Installation
As Sqoop is a sub-project of Hadoop, it can only work on Linux operating system. Follow the steps given below to install Sqoop on your system. Step 1: Verifying JAVA…
Sqoop
The traditional application management system, that is, the interaction of applications with relational database using RDBMS, is one of the sources that generate Big Data. Such Big Data, generated by…
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