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The Latest Data Engineering Topics

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Writing Custom Hive UDF and UDAF
User Defined Functions and User Defined Aggregate Functions allow you to completely customize how Hive evaluates data and manipulate queries.
March 12, 2016
by Hardik Pandya
· 95,543 Views · 7 Likes
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How to Detect and Analyze DDOS Attacks Using Log Analysis
Running anything online leaves you vulnerable to attack. In this post, we go into depth on an attack at Linode that lasted 10 days.
March 11, 2016
by Jennifer Marsh
· 19,060 Views · 6 Likes
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A Quick Primer on Microservices
The post you've all been waiting for: a from-the-beginning explanation of what Microservices are and why you should care.
March 10, 2016
by Omed Habib
· 14,603 Views · 6 Likes
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RDBMS & Graphs: SQL vs. Cypher Query Languages
If SQL is like a poem then Cypher is like a Haiku: minimal and deep. Read on and you'll understand the analogy.
March 10, 2016
by Michael Hunger
· 11,424 Views · 3 Likes
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Kubernetes Namespaces, Resource Quota, and Limits for QoS in Cluster
Check out this post and learn to apply namespaces, resource quotas, and limits for sharing your clusters across different environments in Kubernetes.
March 10, 2016
by Arun Gupta
· 12,543 Views · 4 Likes
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JavaServer Faces 2.3 Quick Reference
JSR 372 is currently in the Early Draft Review stage. The JSF 2.3 spec is not complete and will likely change significantly before finalization. In the meantime, here's a pragmatic deep-dive into JSF 2.3 in its current state.
March 9, 2016
by Anghel Leonard DZone Core CORE
· 59,085 Views · 19 Likes
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SQL: Counting Groups of Rows Sharing Common Column Values
Mixing basic SQL concepts can help to express a wider variety of data that one might not be able to. We have a look at an example of counting the number of rows in a table that meet a particular condition with the results grouped by a certain column of the table.
March 9, 2016
by Dustin Marx
· 101,733 Views · 4 Likes
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Returning Multiple Values from Functions in C++
In this day and age, programmers often need to return multiple values from functions in C++. Author Eli Bendersky provides an overview of some of the options available to accomplish this feat, along with a peek at what's in store for this necessity in C++.
March 9, 2016
by Eli Bendersky
· 111,432 Views · 4 Likes
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Spring Batch – A Batch Framework Introduction
Learn more about Spring Batch, a batch framework built on Spring. We'll learn what batch programming is, and see the basics of Spring Batch.
March 8, 2016
by Siva Prasad Rao Janapati
· 6,234 Views · 4 Likes
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Advanced MySQL Load Balancing With NGINX Plus
In this article, we explain how to use some of the advanced features in NGINX Plus and the open source NGINX software to load balance MySQL database servers in a Galera cluster. Read on for more info.
March 7, 2016
by Faisal Memon
· 8,241 Views · 5 Likes
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NoSQL Database Types
In this article, excerpted from Introducing Data Science, we will introduce you to the four big NoSQL database types. Read on for more info.
March 5, 2016
by Arno Meysman
· 89,654 Views · 21 Likes
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How to Perform Joins in Apache Hive
Covering the basics of joins in hive in a detailed tutorial from Hardik Pandya.
March 5, 2016
by Hardik Pandya
· 27,832 Views · 5 Likes
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Build an Online Store With MongoDB, Node.js, and Elasticsearch
Check out the following infographics and brief break-down to help you visualize and understand the decisions involved in choosing a microservice architecture.
March 4, 2016
by Siva Prasad Rao Janapati
· 23,054 Views · 15 Likes
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Word Count Program With MapReduce and Java
In this post, we provide an introduction to the basics of MapReduce, along with a tutorial to create a word count app using Hadoop and Java.
March 3, 2016
by Shital Kat
· 450,131 Views · 31 Likes
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Linking Apache Ignite and Apache Kafka for Highly Scalable and Reliable Data Processing
Here's how to link Apache Kafka and Ignite, for maintaining scalability and reliability for data processing. We'll explore injecting data with KafkaStreamer, as well as IgniteSinkConnector.
March 3, 2016
by Roman Shtykh
· 24,535 Views · 13 Likes
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AWS SQS and Spring JMS Integration
For Java applications, the JMS API is an easy way to use the SQS messaging service in Amazon Web Services, especially with Spring Boot.
March 2, 2016
by Emmanouil Gkatziouras DZone Core CORE
· 45,914 Views · 5 Likes
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How To Handle Blocking Calls: Thread Concurrency vs. Network Asynchronicity
There are several methods for handling client requests involving blocking operations. Check out this comparison between thread concurrency and network asynchronicity, with a problem, and potential solutions.
March 2, 2016
by Ricardo Almeida
· 19,092 Views · 13 Likes
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Python: Intro to Caching
In this article, we’ll look at a simple example that uses a dictionary for our cache. Then, we’ll move on to using the Python standard library’s functools module to create a cache. Read on for more info.
March 1, 2016
by Mike Driscoll
· 12,677 Views · 2 Likes
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Better Automated Acceptance Tests With Serenity Screenplay
A tutorial on how to use Serenity, a library for reporting automated acceptance tests in a BDD environment.
February 29, 2016
by John Ferguson Smart
· 10,146 Views · 4 Likes
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How to Initialize Database With Default Values in SQLAlchemy Once After Database Creation
Recently, while working on a Python app, I needed an SQLAlchemy functionality to insert default values into SQLite database. In particular, I simply needed to execute some DDL only once after the database was created. How does SQLAlchemy handle this? Let’s investigate it on a simple database model for a prototype of a todo app created in the online database designer Vertabelo.
February 25, 2016
by Patrycja Dybka
· 44,198 Views · 3 Likes
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