Follow the steps below for MongoDB installation using tar distribution: 1. Download the stable release of MongoDB from here. 2. Extract the distribution tar –xzvf mongodb-linux 3. Create a directory for mongo db in /opt. mkdir /opt/mongodb 4. Move the distribution files to mongodb directory mv mongolinux/* /opt/mongodb 5. Add […]
How to close an alert window?
I have come across situations where I have to tackle with alert windows coming up on to my screen randomly i.e. when I am not sure of their occurring behavior. Thus, in this article, our major focus would remain on “How to close an alert window”. Lately, while developing a […]
What is QTP/UFT?
Hello Friends, I am a QTP Automation Test Engineer with a good amount of experience in different versions of QTP. I would like to share all my knowledge with you all. I found this tool very interesting. So are you ready!!! Let’s start with in and outs of QTP, I […]
Java HashMap
Java HashMap Introduction Java HashMap is the HashTable implementation of Map interface. It is a collection used to store data as key and value. It allow a single null in Key and any number of null values. Java HashMap Anatomy Buckets: It is the Entry array created to hold different key-value […]
MapReduce Introduction
Hadoop MapReduce is a software framework designed to develop applications to process large dataset in parallel in a reliable and fault tolerant manner. A MapReduce application processes the input dataset into chunks in parallel on multiple nodes. The below diagram shows the different phases for a MapReduce application: There are two […]
Zookeeper Standalone Installation
Pre-requisites Before starting with Zookeeper standalone installation, make sure that the node have the following pre-requisites: a) Supported Platforms: GNU/Linux, Win32, MacOSX, FreeBSD and Sun Solaris. This blog describes the installation steps for Linux. b) Sun Java 1.6 or above should already be installed. To install Java, you can refer to the installation steps mentioned in the blog. […]
Zookeeper Clustered Mode Installation
Pre-requisites Before starting with Zookeeper cluster mode installation, make sure that the node have the following pre-requisites: a) Supported Platforms: GNU/Linux, Win32, MacOSX, FreeBSD and Sun Solaris. This blog describes the installation steps for Linux. b) Sun Java 1.6 or above should already be installed. To install Java, you can refer to the installation steps […]
HDFS High Availability Architecture
In the previous blog, we discussed about the need and design goals of HDFS High Availability. In this blog, we will talk about the architecture of HDFS high availability. HDFS High Availability Architecture In order to provide a HOT back-up and consistent solution for NameNode failure, a concept of using two […]
Flume Installation
Apache Flume is a distributed, reliable, and available system for efficiently collecting, aggregating and moving large amounts of log data from many different sources to a centralized data store. In this post, we would discuss about flume installation. The use of Apache Flume is not only restricted to log data aggregation. […]
Selenium WebDriver script for login
In this tutorial, we would make you acquainted with the primary sections of an elemental WebDriver test script. We would create a sample Selenium WebDriver script for login functionality to make you familiar with code and strategy. Before starting with the test script creation, let us take a moment to […]