von Neumann, revisited


Intel’s Bold Plan to Reinvent Computer Memory (and Keep It a Secret)

John von Neumann (during the Manhattan project, 1940-1945). Public domain, Link

We all read John von Neumann’s groundbreaking paper “First Draft of a Report on the EDVAC” back when it was published in 1945, did we not (just joking)?

You should. And read it well, because not many people did (I know of no-one). OK, I admit that some of the mathematics is above me as well, but one thing stuck with me: there are two ways of building a programmable computer. One is how we started doing it, which has become known as the “von Neumann architecture”: a memory unit and a processing unit, and a speeding cycle between the two, transferred through a bus.

We’ve all seen Alan Kay’s famous cardboard model of what a modern computer could look like, from 1965, did we?

Alan Kay’s Dynabook concept model (1965). Copyright Owner © Mark Richards

As we all did (OK I’ll stop here, but I am not kidding: you should have read them!), Alan Kay had read the article by Gordon Moore (inspired by Doug Englebart already in 1959), about cramming more processors on an Integrated Circuit:

The complexity for minimum component costs has increased at a rate of roughly a factor of two per year. Certainly over the short term this rate can be expected to continue, if not to increase. Over the longer term, the rate of increase is a bit more uncertain, although there is no reason to believe it will not remain nearly constant for at least 10 years.

Useless, Alan Kay reasoned, to think about what computers can do now. We should be thinking about what they might be able to do 10 years from now, because it is almost unfathomable! And the Dynabook was a concept born from that daydreaming. A machine with a radio inside, able to communicate with similar devices in a world-spanning peer-to-peer network. How about that!

I fear that Alan Kay may be one of the very few who realised the consequence of Moore’s Law (as it was named in 1975). And now here we are, more than half a century later, and still we believe that von Neumann’s first proposal is the only way to build computers! And we still believe that creating the tools to tap that power should be built based on that architecture (memory-processor = data-functions)!

Change is inevitable. Even though Alan Kay’s vision from 1965 is still not really realised, it might be coming near now. Developments in hardware like memory and processors really start showing the shortcomings of the “first” von Neumann architecture. Massive parallelism, but especially memory that is so fast that the difference between memory and disk is disappearing, and memory that is persistent, is changing the game in a fundamental way. New computer architectures are desperately needed.

Intel’s 3D XPoint promises memory that is more than a 1000 times faster than flash, and stores more than 10 times more than DRAM. Memory and storage will no longer be different, databases are a thing of the past (everything can be done in-memory, just think about this!).

We launched our new websites and logo!

Last Friday, after some weeks of hard work, we launched our new websites, with a totally redesigned style and logo. There are still a few hick-ups (such as an SSL certificate that is not working properly, causing problems on the https versions of our sites 😢), but those will be repaired soon.

These are the most important changes:

  • The function of the sites has changed
    • robvens.nl is now entirely Dutch, targeting a recent addition to the portfolio of Reflektis: mediation, conflict coaching and negotiation, under the umbrella name “Rob Vens Mediation”
    • reflektis.nl/.com is all about enterprise architectuur, under the umbrella name “Reflektis”
  • My blog (articles on anything from enterprise architecture to philosophy) has been moved from robvens to reflektis: www.reflektis.nl/blog (Dutch articles) and www.reflektis.com/blog (English articles)
  • On robvens.nl we started a new blog (sorry, entirely Dutch for now) on mediation, conflict coaching and negotiation: www.robvens.nl/blog. Rob Vens Mediation is internationally active and available, but our primary focus for now is on The Netherlands.
  • The Dutch site of Reflektis can now be found on reflektis.nl, the English on reflektis.com. We are working hard on vast improvements on the sites’ bilingual abilities.
  • We are house-cleaning on the social sites as well. From now on Reflektis and Rob Vens will only use Twitter and LinkedIn. Rob Vens Mediation on Facebook and LinkedIn. The Twitter account Rob Vens used will be deactivated, the Facebook accounts of Rob Vens and Reflektis as well. Do you follow us on accounts that become active? Please start following us on the active ones!

More developments are in the make, but for now we hope you can appreciate this facelift!

The new branding has sprouted from the creative minds of Echelon Creations, thank you Arnd-Jan Blok, Elisa Salentijn!

Why You Should Avoid a Canonical Data Model

Stefan Tilkov
Stefan Tilkov

“As an enterprise architect, you might be tempted to strive for a canonical data model for your systems’ interfaces. That’s not a good idea.”

Source: www.innoq.com (STEFAN TILKOV March 24, 2015)
This article has originally been published in Dutch. We’re sorry, but a translation in English is not yet available.

The article is a discussion on the article by Stefan Tilkov on innoq, where he explains the dangers of canonical data models.

To read the original article (in Dutch), please go to: Why You Should Avoid a Canonical Data Model.