Track: Reactive Architecture


Day of week:

Learning about how to create reactive systems is more than simply learning a new framework. Thinking in a reactive fashion helps you to design more responsive, more robust architectures. Learn all about the latest trends in this track.

Track Host:
Martin Thompson
High Performance & Low Latency Specialist
Martin is a high-performance and low-latency specialist, with experience gained over two decades working on large scale transactional and big-data systems. He believes in Mechanical Sympathy, i.e. applying an understanding of the hardware to the creation of software as being fundamental to delivering elegant high-performance solutions. The Disruptor framework is just one example of what his mechanical sympathy has created. Martin was the co-founder and CTO of LMAX. He blogs at, and can be found giving training courses on performance and concurrency, or hacking code to make systems better.
10:20am - 11:10am

by Caitie McCaffrey
Distributed Systems Engineer at Twitter

Halo 4 is a first-person shooter on the Xbox 360, with fast-paced, competitive gameplay. To complement the code on disc, a set of services were developed to store player statistics, display player presence information, deliver daily challenges, modify playlists, catch cheaters and more. As of June 2013 Halo 4 had 11.6 million players, who played 1.5 billion games, logging 270 million hours of gameplay.

Orleans, Distributed Virtual Actors for Programmability & Scalability, is an...

11:30am - 12:20pm

by Pieter Hintjens
Distributed computing Expert

The future of software is distributed, and successful distributed systems (in all realms) depend on contracts, which means protocols. Yet protocol design is a black art, poorly understood and rarely taught. Protocols are typically laborious to develop, over-complex, and slow to adapt. Yet decentralised, large-scale reactive systems need decentralized, reactive protocol development. The high cost and red tape of protocol design is a major problem in our industry. Pieter Hintjens presents a...

1:20pm - 2:10pm

by Andrew Stewart
Director of Software Development at LMAX

So, you're building responsive and resilient applications, scaling to deal with an ever expanding firehose of events arriving at your front door. You're filling storage by the terabyte without even trying, and that needs to be resilient, and responsive, and scalable too. So obviously you're storing your data using... well... what? Is there really a single technology that meets all your needs for persistence? And are the 'conventional' technologies really a lost cause?

In this talk we'...

2:30pm - 3:20pm

by Howard Chu
Chief Architect for the OpenLDAP Project and CTO of Symas Corporation

The Lightning Memory-Mapped Database was introduced at LDAPCon 2011 and has been enjoying tremendous success in the intervening time. The success of LMDB has led down many different paths:

Use of LMDB eliminated bottlenecks at the database level but revealed the presence of other bottlenecks in the slapd code. Recently a number of these other bottlenecks have also been removed, yielding even greater performance gains. LMDB has proved to be a superior database engine for many other...

3:40pm - 4:30pm

by Peter Lawrey
10K Java answers on StackOverflow, Performance JUG Founder

Accessing a database can take 100s of micro-seconds, while caching large datasets on the heap can incur multi-second GC pauses.

An alternative is to use memory map files to store data for micro-second read/write times and very fast application restart.

For data driven reactive systems, how do you realistically profile your latency distribution in a test environment? How to you find rare bugs which only occur after millions of events and have confidence you have fixed them? How...

4:50pm - 5:40pm

by Richard Kasperowski
QCon Open Space Facilitator

Open Space

Join Trisha Gee, our speakers, and other attendees for the Reactive Architecture Open Space

What is Open Space?

Every day at QCon London, we’ll open space five times, once for each track. Open Space is a kind of unconference, a simple way to run productive meetings for 5 to 2000 or more people, and a powerful way to lead any kind of organization in everyday practice and extraordinary change.




Covering innovative topics

Wednesday, 4 March

  • Architecture Improvements

    Next gen architecture, Arch over the full lifecycle, Bleeding edge tech in legacy, Cognitive biases in architecture, Evolving Architecture.

  • Big Data Frameworks, Architectures, and Data Science

    As big data tools and architectures continue to evolve, how do you architect and select technologies that work now but are also future-proof?

  • DevOps and Continuous Delivery: Code Beyond the Dev Team

    As infrastructure becomes as malleable as code, a unified approach from reqs to ops is needed to deliver promised breakthroughs.

  • Engineering Culture

    The best teams and companies talk about how to create amazing engineering cultures.

  • Java - Not Dead Yet

    Java is evolving to meet developer and business needs, from lambdas in Java 8 to built-in support for money types rumoured for Java 9.

  • Mind Matters at Work

    How theories from neuroscience and psychology can help us better understand IT professionals and discover what really motivates them.

Thursday, 5 March

  • Docker, containers and application portability

    People building stuff for and with containers showing why application portability is important, and what can be done with expanding ecosystems.

  • Evolving agile

    Reflecting on and learning from successes and failures in applying agile approaches since the creation of the Agile Manifesto and exploring ways of applying agile practices to increase business value.

  • HTML and JS Today

    The state of the art in web technologies. What is important to know and why?

  • Internet of Things

    What software devs need to know to design and build for instrumented environments and reactive things, what new issues and questions it raises.

  • Modern CS in the Real World

    How modern CS helps you tackle today's problems.

  • Reactive Architecture

    How to create reactive systems is more than simply learning a framework. Thinking in a reactive way helps you to design responsive architectures.

  • The Go Language

    The Go Language - Concurrency, Performance, Systems Programming.

Friday, 6 March

  • Architectures You've Always Wondered About

    Get a rare look behind the scenes and get to see the architectures of the most well-known sites with the least known architectures.

  • Low latency trading

    The 'race to zero' continues. Join us to learn about the latest tecniques being deployed to optimise order routing and execution.

  • Open source in finance

    Financial services have changed from OS as cost-saving to a competitive weapon. See open source projects that are disrupting the finance industry.

  • Product Mastery

    Come have fun with fellow PMs and BAs as you learn about Value Management. We'll even tell you dark tales of Snarks, Hippos and other obstacles.

  • Taming Microservices

    Tackling the challenges of microservices in practice.

  • Taming Mobile

    Mobile is no longer the Next Big Thing but a requirement for your business. Hear from those who have implemented successful mobile systems.