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5 Design Principles for System Configuration

by Manuel Pais on  Mar 25, 2015

Popular configuration mechanisms like conf.d pose multiple problems when trying to converge system configuration using configuration management tools. Ish-Shalom proposes five design principles for configuration that prevent those problems. The core ideas being the use of a configuration API and the separation of configurations based on the type of system updates they require.

Clarifying Domain-Driven Design Using a Trading Application Example

by Jan Stenberg on  Mar 24, 2015

Domain-Driven Design (DDD) is an approach to building software emphasizing collaboration between domain experts, developers and others involved in order to meet business objectives, Naresh Bhatia explains introducing the DDD base concepts exemplifying with Bullsfirst, an example system of medium complexity from the financial trading domain.

Making Sense of Event Stream Processing

by Jan Stenberg on  Mar 22, 2015 1

Structuring data as a stream of events is an idea appearing in many areas and is the ideal way of storing data. Aggregating a read model from these events is an ideal way to present data to a user, Martin Kleppmann claims explains when describing the fundamental ideas behind Stream Processing, Event Sourcing and Complex Event Processing (CEP).

Lessons Learned From Scaling Services at Google and eBay

by João Miranda on  Mar 22, 2015

Randy Shoup shared his experiences to the QCon London audience in scaling services at Google and eBay, giving advice on building and operating services. A successful services strategy requires end-to-end service ownership, decentralized decision-making and standardization efforts focused on protocols of communications and supporting infrastructure.

Yelp Engineering: Using Services to Break Down a Monolith

by Daniel Bryant on  Mar 19, 2015

The Yelp engineering team have stated that moving to a service-oriented architecture has allowed them to scale their development process and maintain a rapid pace of software delivery as the team and codebase has grown. This has been achieved by focusing on distributed systems education, creating a set of basic service design principles and implementing a supporting infrastructure.

Effektif Open Sources BPM Software with an Emphasis on Developers

by Victor Grazi on  Mar 16, 2015 2

Business process management software provider Effektif today announced the open sourcing of their workflow engine. The new model allows developers to include Effektif workflows from within their applications via Java and REST APIs

Uber Unveils its Realtime Market Platform

by João Miranda on  Mar 15, 2015

Matt Ranney, Chief Systems Architect at Uber, gave an overview of their dispatch system, responsible for matching Uber's drivers and riders. Ranney explained the driving forces that led to a rewrite of this system. He described the architectural principles that underpin it, several of the algorithms implemented and why Uber decided to design and implement their own RPC protocol.

Phil Calcado on Lessons Learnt During SoundCloud's Microservice Migration

by Daniel Bryant on  Mar 15, 2015

At QCon London 2015 Phil Calcado shared lessons learnt from SoundCloud’s move from a monolithic to microservices architecture, and stated that the core requirements for building a microservice platform include developing capabilities for rapid provisioning, basic monitoring and rapid application deployment.

A Modern Microservices Architecture

by Jan Stenberg on  Mar 10, 2015

After living with microservices for three years at Gilt we can see advantages in team ownership, boundaries defined by APIs and complex problems broken down. Challenges still exists in tooling, integration environments and monitoring, Yoni Goldberg explained in a presentation at the QCon London conference describing the challenges they encountered moving to a microservices architecture.

Microservices Are Conceptually Too Big

by Jan Stenberg on  Mar 09, 2015 3

Microservices are conceptually too big; they conflate optimizing for organisational and technical factors, but solutions to problems of each type may not fit together very well, Phil Wills, senior architect at The Guardian, explained in a presentation at the QCon London conference promoting thinking about independent services and single responsibility applications, rather than microservices.

How Twitter Answers Handles Five Billion Sessions a Day

by Sergio De Simone on  Mar 09, 2015

Twitter's Answers is an analytics service for mobile apps that has come to see five billion sessions per day. Ed Solovey, software engineer at Twitter, has described how their system works to provide "reliable, real-time, and actionable" data based on hundreds of millions of mobile devices sending millions of events every second.

Microservices and the Goal of Software Development

by Jan Stenberg on  Mar 08, 2015

The goal of software is to sustainably minimize lead time to positive business impact, everything else is detail, Dan North claimed in a presentation at the QCon London conference describing ways of reasoning about code and how this leads him into an architecture style that may fit microservices.

DevOps Needed for Operating Microservices

by João Miranda on  Mar 08, 2015

At the last QCon London, Michael Brunton-Spall, Technical Architect at the UK's Government Digital Service, expressed his views on how DevOps patterns are crucial to successfully operate microservices. Brunton-Spall identified the key ingredients to identify a microservice, explained how to build your first microservice and the necessary tools and practices to manage an ecosystem of microservices.

Building Halo 4, a Video Game, Using the Actor Model

by Jan Stenberg on  Mar 07, 2015 3

When designing and building Halo 4, the next version in a video game series, a new solution was created based on the Actor model implemented by the Orleans framework. Caitie McCaffrey told in a presentation at the QCon London conference talking about the work designing and building the services supporting the new game.

Your Code as a Crime Scene

by João Miranda on  Mar 07, 2015

Measuring software complexity is a popular and common activity among the software development community, judging by the number of tools built over the years and the literature around the subject. Drawing from his blend of engineering and psychology backgrounds, Adam Tornhill proposed to its audience at QCon London to treat their code as a crime scene, with the help of version control tools.

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