Splunk – Source Types
All the incoming data to Splunk are first judged by its inbuilt data processing unit and classified to certain data types and categories. For example, if it is a log…
Splunk – Data Ingestion
Data ingestion in Splunk happens through the Add Data feature which is part of the search and reporting app. After logging in, the Splunk interface home screen shows the Add Data icon as shown…
Splunk – Interface
The Splunk web interface consists of all the tools you need to search, report and analyse the data that is ingested. The same web interface provides features for administering the…
Splunk – Environment
In this tutorial, we will aim to install the enterprise version. This version is available for a free evaluation for 60 days with all features enabled. You can download the…
Splunk – Overview
Splunk is a software used to search and analyze machine data. This machine data can come from web applications, sensors, devices or any data created by user. It serves the…
Spark SQL – Programmatically Specifying the Schema
The second method for creating DataFrame is through programmatic interface that allows you to construct a schema and then apply it to an existing RDD. We can create a DataFrame…
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…
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…
Spark SQL – Installation
Spark is Hadoop’s sub-project. Therefore, it is better to install Spark into a Linux based system. The following steps show how to install Apache Spark. Step1: Verifying Java Installation Java…
Spark SQL – RDD
Resilient Distributed Datasets Resilient Distributed Datasets (RDD) is a fundamental data structure of Spark. It is an immutable distributed collection of objects. Each dataset in RDD is divided into logical…
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