Data Engineering Resources

A Couchbase Index Technique for LIKE Predicates With Wildcard

Take a look at some of the latest changes to Couchbase in action, including a more efficient way to index and query your data.

September 20, 2016

by Tai Tran

· 11,128 Views · 13 Likes

Imperative vs. Declarative Query Languages: What's the Difference?

To say that any non-imperative query language is declarative is too broad a definition. See how declarative and imperative languages work and where the work best.

September 20, 2016

by Joy Chao

· 14,825 Views · 4 Likes

How MySQL X Plugin Works Under the Hood

X Plugin allows MySQL to function as a document store. We don’t need to define any schema or use SQL language while still being a fully ACID database.

September 20, 2016

by Miguel Angel Nieto

· 6,709 Views · 3 Likes

OpenStack: Core Components

OpenStack is an open source cloud software which consists of a series of allied projects controlling large pools of computing, storage, and network resources in a data center while managing through a dashboard. Let's look in detail at its various core components.

Updated September 19, 2016

by Sree Tejaswi

· 75,126 Views · 22 Likes

High-Quality Recommendation Systems with Elasticsearch: Part I

We argue that recommendations and search are two sides of the same coin. Both rank content for a user based on “relevance.” The only difference is whether a keyword query is provided. Read this article to find out more.

Updated September 18, 2016

by Doug Turnbull

· 11,864 Views · 7 Likes

Building a Language: Generating Bytecode

Federico Tomassetti's series on building your own language reaches bytecode.

September 18, 2016

by Federico Tomassetti

· 15,152 Views · 15 Likes

Monitoring Docker Containers with Elasticsearch and Cadvisor

If you run a Swarm Mode cluster or even one Docker engine, you've likely wondered how to keep track of all that's happening. Read for tips on monitoring your containers.

Updated September 17, 2016

by Lorenzo Fontana

· 12,835 Views · 9 Likes

Basic CRUD Operations Using Perl and DBD::Oracle

Use a driver to help you directly implement CRUD operations, giving you more control over your data and helping you make it work for you.

September 17, 2016

by Blaine Carter

· 4,865 Views · 5 Likes

API Stylebook: A Collection of Resources for API Designers

An API stylebook is now available for API designers to use, complete with helpful techniques cobbled together from 12 API design guides. Read on to find out more!

September 17, 2016

by Kin Lane

· 6,483 Views · 6 Likes

Running Multiple Zookeeper Instances on Single Windows Machine

This tutorial with screenshots will teach you how to run multiple instances of the popular config management software ZookeeperRunner on your local machine.

Updated September 16, 2016

by Mohammad Nadeem

· 37,340 Views · 5 Likes

Hazelcast vs ElastiCache (Memcached)

This article compares Hazelcast to the Amazon Web Services ElastiCache Memcached Engine. Cost, Features, Node Management, Fault Tolerance, Monitoring, and Performance are all evaluated.

September 16, 2016

by Terry Walters

· 10,355 Views · 11 Likes

Rake Tasks: db:seed vs. dev:prime

Using rake db:seed, which is already built into Rails, may seem preferable to using a custom rake task like rake dev:prime. However there's a time and place for both.

September 15, 2016

by Jason Draper

· 4,191 Views · 3 Likes

Wireless Communications in Modern Mobile Technologies

You may want to create applications for a specific device. Before you break out your IDE and start tinkering with hardware, let’s take a quick tour of Bluetooth, Wi-Fi, NFC and mobile data to learn how these technologies work, and which applications each one is best suited for.

September 15, 2016

by Lance Gleason

· 13,539 Views · 4 Likes

Kafka Real-Time Visualization

Alooma Live allows you to visualize your data streams in real time. Come check out how it works using a Kafka cluster!

September 14, 2016

by Itamar Weiss

· 14,605 Views · 6 Likes

PL/SQL 101: Raising Exceptions in PL/SQL

Learn how you can create your own exceptions within PLSQL and keep your code neat and tidy while you do it.

September 14, 2016

by Steven Feuerstein

· 10,428 Views · 3 Likes

Autocommit in PostgreSQL's Psql

This tutorial will show you how to enable, disable, and use autocommit with PostgreSQL's command-line SQL tool — psql.

September 13, 2016

by Dustin Marx

· 82,479 Views · 7 Likes

Mockito Custom Answers

Custom argument matchers and custom answer behavior allow us to use Mockito to mock complex and responsive behavior, making for highly realistic tests.

September 13, 2016

by Alan Hohn

· 7,031 Views · 2 Likes

Basic Housekeeping for MySQL Indexes

It's important to keep your indexes neat and tidy. Here are four simple rules (with examples) you can follow to keep your databases running smoothly.

September 12, 2016

by Daniel Guzman Burgos

· 7,949 Views · 6 Likes

How HashMap Works in Java

HashMap questions are common in job interviews. Here's some in-depth explanation of how HashMaps work internally in Java.

September 12, 2016

by Jackson Joseraj

· 258,828 Views · 96 Likes

Event-Driven Microservices With Vert.x and Kubernetes (Part 1 of 3)

Learn how to set up an event-driven microservices architecture using Vert.x's Verticle class. This introductory post covers how to use and configure Vert.x.

September 12, 2016

by Andy Moncsek

· 27,926 Views · 11 Likes

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