Stream processing, Event sourcing, Reactive, CEP… and making sense of it all

I’m using a Apache Storm,MongoDB,ElasticSearch and Apahce Kafka to build a similar system. I would blog about it when I finish. Hopefully next week 21st Feb. 2015.


This is an edited transcript of a talk I gave at /dev/winter 2015.

Some people call it stream processing. Others call it Event Sourcing or CQRS. Some even call it Complex Event Processing. Sometimes, such self-important buzzwords are just smoke and mirrors, invented by companies who want to sell you stuff. But sometimes, they contain a kernel of wisdom which can really help us design better systems.

In this talk, we will go in search of the wisdom behind the buzzwords. We will discuss how event streams can help make your application more scalable, more reliable and more maintainable. Founded in the experience of building large-scale data systems at LinkedIn, and implemented in open source projects like Apache Kafka and Apache Samza, stream processing is finally coming of age.

Title: making sense of stream processing

In this presentation, I’m going to discuss some of the ideas that people have about processing event streams. The idea…

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Knightmare: A DevOps Cautionary Tale


Doug Seven

I was speaking at a conference last year on the topics of DevOps, Configuration as Code, and Continuous Delivery and used the following story to demonstrate the importance making deployments fully automated and repeatable as part of a DevOps/Continuous Delivery initiative. Since that conference I have been asked by several people to share the story through my blog. This story is true – this really happened. This is my telling of the story based on what I have read (I was not involved in this).

This is the story of how a company with nearly $400 million in assets went bankrupt in 45-minutes because of a failed deployment.


Knight Capital Group is an American global financial services firm engaging in market making, electronic execution, and institutional sales and trading. In 2012 Knight was the largest trader in US equities with market share of around 17% on each the…

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Why Explore Space? A 1970 Letter to a Nun in Africa

Roger Launius's Blog

Ernst Stuhlinger (1913-2008)

Ernst Stuhlinger wrote this letter on May 6, 1970, to Sister Mary Jucunda, a nun who worked among the starving children of Kabwe, Zambia, in Africa, who questioned the value of space exploration. At the time Dr. Stuhlinger was Associate Director for Science at the Marshall Space Flight Center, in Huntsville, Alabama. Touched by Sister Mary’s concern and sincerity, his beliefs about the value of space exploration were expressed in his reply to Sister Mary. It remains, more than four decades later, an eloquent statement of the value of the space exploration endeavor. Born in Germany in 1913, Dr. Stuhlinger received a Ph.D. in physics from the University of Tuebingen in 1936. He was a member of the German rocket development team at Peenemünde, and came to the United States in 1946 to work for the U.S. Army at Fort Bliss, Texas. He moved to Huntsville in…

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Seth Godin: Why I want you to steal my ideas

Good Read.

TED Blog


By Seth Godin

Please don’t steal my car.

If you drive away with it, I won’t have it any more, which is a real hassle.

Please don’t steal my identity or my reputation either. Neither travels well, and all the time you’re using it, you’re degrading something that belongs to me.

But my ideas? Sure, yes, please, by all means, take them.

The scarcity underlying the industrial economy (what’s not yours is mine) has pushed us to make a mistake about ideas. If everyone in town comes to my plant and takes a free sample of what I make, I’ll go bankrupt. But if everyone in the world takes a free sample of one of my ideas (or at least one of my good ones), we’ll all get richer.

I got an email from a reader last week. She was spitting angry at another blogger and wanted me to lower the…

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The Ultimate Cheat Sheet For Reinventing Yourself

I really like James Alucher’s post. Most of the points here are “obvious truths” we rarely believe and ready to act on until someone else tells us.


Editor’s note:  James Altucher is an investor, programmer, author, and several-times entrepreneur. His latest book, is “Choose Yourself!”  (foreword by Dick Costolo, CEO of Twitter) . Follow him on Twitter @jaltucher.

Here are the rules: I’ve been at zero a few times, come back a few times, and done it over and over. I’ve started entire new careers. People who knew me then, don’t me now. And so on.

I’ve had to change careers several times. Sometimes because my interests changed. Sometimes because all bridges have been burned beyond recognition, sometimes because I desperately needed money. And sometimes just because I hated everyone in my old career or they hated me.

There are other ways to reinvent yourself, so take what I say with a grain of salt. This is what worked for me.

I’ve seen it work for maybe a few hundred other people. Through interviews, through people…

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BlackBerry’s Bad Timing Buries Its Own Flicker Of Good News On BBM Android/iOS Downloads (10M In A Day)

This is rather sad for RIM


Timing is everything. Too early and your product will shrivel; too late and it will be overlooked no matter how shiny. Just ask BlackBerry — a company with spectacularly bad timing in recent memory. A string of hesitations and bad decisions made the BlackBerry maker too late to the mobile party again and again.

Clinging stubbornly to old QWERTY keyboard habits left its hardware out of touch — literally — when it came to competing with Android and iOS, and allowed RIM to delay the necessary refocusing of its mobile platform for too long. That next-gen platform arrived eventually in BlackBerry 10, but the BlackBerry faithful had already mostly departed for pastures new, leaving the company with a load of unsold BB10 handsets and a $965 million hole in its books.

That story is so much water under the bridge now, as the company appears to be on the…

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Thank You.

Before anything I would like to thank everyone who got me ‘through all means’ neccesary to start blogging.

                                                    Akpe.  Medase. Merci.

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