Data Engineering Resources

A Guide for Customer Retention Analysis With SQL

See how to make basic customer retention analysis, build customer retention over time, deal with new vs. existing customers retention curves, and calculate retention analysis in cohorts.

December 22, 2017

by Luba Belokon

· 28,189 Views · 4 Likes

Ring Buffer: A Data Structure Behind Disruptor

In this article, we look at Disruptor, a library for passing messages between threads, and look at how it's data structure enables high performance.

December 21, 2017

by Grzegorz Mirek

· 25,231 Views · 6 Likes

The Evolution of EC2 Network Performance: m3, m4, and m5

So, are AWS EC2's fancy new m5 instances worth it? In a word: yes. See the performance impact and cost savings you can expect.

December 21, 2017

by Andreas Wittig

· 12,538 Views · 4 Likes

Data Visualizations With InfluxDB and Plotly.js

Walk through creating data visualizations with InfluxDB and plotly.js, a JavaScript graphing library built on top of d3.js and stack.gl.

December 20, 2017

by Margo Schaedel

· 14,471 Views · 3 Likes

Implicit vs. Explicit Cursor: Which Should You Use?

"Hmmm," you might be saying to yourself, "a conversation about SQL queries in a post on conditional logic? That's strange." Ah, but maybe not so strange.

December 20, 2017

by Steven Feuerstein

· 8,780 Views · 2 Likes

Elasticsearch for Dummies

Get to know the basics of Elasticsearch, its advantages, how to install it, and how to index documents using Elasticsearch.

December 20, 2017

by Alex Mailajalam

· 10,304 Views · 1 Like

Install oh-my-zsh on Windows

This tutorial is for Windows users who want to set up oh-my-zsh, an open source framework for managing your z shell, or ZSH, configuration.

December 20, 2017

by Michal Bocek

· 29,255 Views · 2 Likes

Row Level Security in Hibernate Using @Filter

Learn how to give certain people permission to view certain parts of your database, and thus increase your database's security.

December 20, 2017

by Ali Akbar Azizkhani

· 22,931 Views · 12 Likes

Highly Available Docker Registry on AWS With Nexus

Want a place to keep your Docker images that won't fail when the chips are down? See how you can create an HA repo on AWS using Nexus.

December 20, 2017

by Mohamed Labouardy

· 11,655 Views · 5 Likes

Making Graph Databases Fun Again With Java

Graph databases need to be made fun again! Not to worry — the open-source TinkerPop from Apache is here to do just that.

December 20, 2017

by Otavio Santana

CORE

· 23,096 Views · 12 Likes

Looking Inside Postgres at a GiST Index

What does the GiST API do? And what does it mean to extend Postgres’s indexing system, exactly? Read on to find out!

December 19, 2017

by Pat Shaughnessy

· 12,129 Views · 5 Likes

How to Pick Different CSV Files at JMeter Runtime

A CSV file is a file that enables users to represent data in a table format. Learn how to manipulate CSV files using the open source tool JMeter.

December 19, 2017

by Sebastian Lorenzo

· 17,333 Views · 2 Likes

Data Transformation: CSV to XML With Apache Camel

Learn how to convert a CSV message into XML using Camel Apache Processor, or from any format into another, with code examples.

Updated December 19, 2017

by Jitendra Bafna

· 42,111 Views · 7 Likes

Communicating Between Microservices

Inter-service communication is essential to consider when building microservices. Learn about the characteristics and benefits of different communication styles.

December 19, 2017

by Piotr Mińkowski

· 199,783 Views · 119 Likes

Data Modelling: Counter Table

Sometimes, you need to avoid failure scenarios where in-memory systems aren't suitable. In those cases, I recommend using an aggregate counter table.

December 19, 2017

by Jonathan Levin

· 10,412 Views · 2 Likes

Data Transformation: XML to JSON And JSON to XML With Apache Camel

In this tutorial, you will learn how to achieve data transformation by converting XML to JSON and JSON to XML with Apache Camel.

December 19, 2017

by Jitendra Bafna

· 57,242 Views · 7 Likes

Check out this great article on to learn how to create authentication and authorization protocols in your web application using ASP.NET.

December 19, 2017

by Kelvin Santos Amorim

· 45,451 Views · 4 Likes

EC2 Network Performance Demystified: m3 and m4

Choosing the right AWS EC2 instance for your network can be a challenge, so here are some benchmarks for m3 and m4 instances to help your decision making.

December 18, 2017

by Andreas Wittig

· 7,954 Views · 1 Like

SAML-Based SSO With Azure AD B2C as an IDP

While signing on might not be the most fun thing for users, for devs, it's a critical part of the process of application security.

December 18, 2017

by Shanky Munjal

· 17,017 Views · 3 Likes

Saving a Tree in Postgres Using LTREE

Trees are natural, haphazard, and branching; database tables are man-made rectangles full of numbers and text. How can you possibly save a beautiful tree structure into an boring DB table?

December 18, 2017

by Pat Shaughnessy

· 15,273 Views · 2 Likes

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