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Concurrency Controls in Data Replication

Learn about leading concurrency control mechanisms used for data replication in distributed environments, comparing synchronous and asynchronous implementations with/without locking - techniques used by Oracle RAC, TimesTen, and GigaSpaces and NoSQL databases. Explore tradeoffs among performance, consistency, deadlocks, and conflicting updates in the context of a sample distributed application.

Yongjun Jiao
on Mar 01, 2011
LinkedIn Signal: A Case Study for Scala, JRuby and Voldemort

On September 29th LinkedIn Signal was announced, providing a social search application both for LinkedIn shares and tweets from LinkedIn-Twitter bounded accounts. This article aims to provide more insight into the motivation and technical challenges of combining Scala, JRuby and Voldemort, at such scale.

Dio Synodinos
on Oct 11, 2010
Revving Up Your Hibernate Engine

This article explores tuning techniques for Hibernate-based applications, focusing on tuning topics that are effective but poorly documented, such as inheritance mapping, second level cache and enhanced sequence identifier generators. It also provides some background database information which is essential for tuning Hibernate.

Stewart Clark Yongjun Jiao
on Oct 06, 2010
Finding an Agile Employer

The rocky job market of the last couple years has left many people looking for work. Agile software development is appealing to many job seekers, but not all jobs are alike. If you want a job in Agile software development, using a framework like Scrum, you need a plan of action that spans all three phases of your job search: reseach/preparation, interviewing, and assessing your opportunities.

Angela Druckman
on Aug 31, 2010
Data Mining in the Swamp: Taming Unruly Data With Cloud Computing

Matrix presents a white paper on using the open source tool, Hadoop, to implement the MapReduce strategy and a Cloud computing strategy to solve business intelligence problems.

John Brothers
on Aug 13, 2010
Eight Quick Ways to Improve Java Legacy Systems

Even Java systems can be "legacy" systems. This article explores 8 quick and relatively low risk ways to improve even the crustiest Java application. Applications that may have previously been written off as dead can find new life by using these tips to improve performance, reduce operations overhead and grease the gears of the development lifecycle.

Tim Cull
on Jul 26, 2010
Book Excerpt and Interview: Amazon SimpleDB Developer Guide

Boris Lublinsky interviews Prabhakar Chaganti and Rich Helms as part of a review of their new book, Amazon SimpleDB Developer Guide. The book provides a simple step-by-step guide on how to develop applications for Amazon Simple DB in different programming languages including Java, PHP, and Python.

Boris Lublinsky
on Jul 20, 2010
Nobody Needs Reliable Messaging

Marc de Graauw challenges the notion that transport-level reliability mechanisms like WS-ReliableMessaging are needed, showing how business-specific logic for in-order and exactly-once processing do the job much better with examples from Dutch Healthcare's SOA.

Marc de Graauw
on Jun 18, 2010
Architecture & Design

Architecting TekPub - Moving from ASP.NET MVC to Ruby on Rails

TekPub is a web site devoted to developers, giving them a source of focused on-line training in various topics from Microsoft Entity Framework to writing your own blog engine using Ruby on Rails. They are an interesting case about company who started on ASP.NET MVC and quickly moved to Ruby on Rails. We had the opportunity to talk with them about their technology turnaround.

Robert Bazinet
on May 19, 2010
Scala & Spring: Combine the best of both worlds

Based on a concrete example with Scala, Spring and JPA the article explains how to enhance Spring with Scala’s powerful concepts such as implicit conversions and traits. Moreover, it shows how the gap between a Java based framework and Scala can smoothly be bridged.

Urs Peter
on May 19, 2010
Graph Databases, NOSQL and Neo4j

Peter Neubauer introduces Graph databases and how they compare to RDBMS' and where they stand in the NOSQL-movement, followed by examples of using a graph database in Java with Neo4j.

Peter Neubauer
on May 12, 2010
Using DNS for REST Web Service Discovery

Service Discovery is an essential aspect of service orientated architecture because it avoids early binding of clients to particular service instances. In this article, Jan Algermissen explains the need for discovery of RESTful services, and explains how the existing Domain Name Service (DNS) standard can be used as a widely-deployed and scalable solution.

Jan Algermissen
on May 03, 2010

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