MongoDB provides an excellent framework to run aggregations. It’s a set of tools through which you can run any kind of report or do data analysis on one or more MongoDB collections- In majority of cases, we use MongoDB just to insert and query the data, but with the aggregation…

In this article, Iam going to show how can we build a WebSocket based application in TypeScript. We are going to create a folder in this case called websocket-example and add the below content to package.json file { "name": "websocket-example", "version": "1.0.0", "description": "", "main": "index.js"…

In this article, we are going to have a brief introduction on different keys and search restrictions in Cassandra. In one of my previous articles, I had mentioned about Cassandra’s columnar based approach. You may refer that article here . Start Cassandra on local cassandra -f 2. Open the command…

Neo4j is a graph database and is different from row, columnar or no-sql database. It has different nodes and they are inter-connected to each other with relationships. Following are the commands to create nodes in Neo4j-n Creating a Node create(n:Employee) Create a Node with properties CREATE (n:Employee{code : 'TV74545', designation…

In Spark, you may need the same set of data many times during execution. Fetching it every time from source may be a time consuming and inefficient process. …

In this section, we will try to deploy a Spark job to a local Spark deployment using Java. Following are the code snippets- First, we will add the required libraries in classpath using maven- Following will be the structure of pom.xml- <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

If you are coming from the Hadoop background then you can understand the performance implications of Hive with ~180GB datasets. …

Spark provides a good UI to provide monitor status of your application, resource consumption and configuration. It’s a part of Spark package. By default it runs on port 4040 http://localhost:4040/jobs/ This UI will only show any data when you execute any action. …