41554 blogs · [ { "id": "01a0878c-6766-733a-805f-d86e28e1c037", "title": "Into the middlegame", "url": "https://jefclaes.be/2026/05/into-the-middlegame.html", "published_at": "2026-05-22T07:00:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299138923c1", "title": "GES scavenging and the hidden cost of link events", "url": "https://jefclaes.be/2018/08/ges-scavenging-and-hidden-cost-of-link.html", "published_at": "2018-08-12T12:58:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299138a57b0", "title": "Amazon Redshift - Fundamentals", "url": "https://jefclaes.be/2018/05/amazon-redshift-fundamentals.html", "published_at": "2018-05-01T12:17:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329913b4c202", "title": "Consumed in 2017", "url": "https://jefclaes.be/2018/01/consumed-in-2017.html", "published_at": "2018-01-03T20:28:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329914313a91", "title": "Passing the AWS Certified Solutions Architect exam", "url": 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Parsing command line arguments (F#)", "url": "https://jefclaes.be/2015/04/parsing-command-line-arguments-with-f.html", "published_at": "2015-04-19T14:54:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32991f51c74a", "title": "Checked errors in F#", "url": "https://jefclaes.be/2015/03/checked-errors-in-f.html", "published_at": "2015-03-29T15:19:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32991fd7f3af", "title": "Scaling promotion codes", "url": "https://jefclaes.be/2015/03/scaling-promotion-codes/", "published_at": "2015-03-15T17:01:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299205debd4", "title": "Domain Language: The Playthrough Bonus", "url": "https://jefclaes.be/2015/02/domain-language-playthrough-bonus.html", "published_at": "2015-02-23T18:05:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299215b8701", "title": "Side by side", "url": "https://jefclaes.be/2015/02/side-by-side.html", "published_at": "2015-02-15T16:34:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329921ea3a8a", "title": "Averages are not good enough (F#)", "url": "https://jefclaes.be/2015/01/averages-are-not-good-enough-f.html", "published_at": "2015-01-18T17:40:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299221ae7f0", "title": "Consumed in 2014", "url": "https://jefclaes.be/2015/01/consumed-in-2014.html", "published_at": "2015-01-11T16:45:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299226c2fe8", "title": "TDD as the crack cocaine of software", "url": "https://jefclaes.be/2014/12/tdd-as-crack-cocaine-of-software.html", "published_at": "2014-12-28T16:29:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329923648a87", "title": "Spinning the wheel: clustering and near misses", "url": "https://jefclaes.be/2014/12/spinning-wheel-clustering-and-near.html", "published_at": "2014-12-14T16:13:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299237af9e9", "title": "Spinning the wheel: manipulating the odds", "url": "https://jefclaes.be/2014/12/spinning-wheel-manipulating-odds.html", "published_at": 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"title": "Porsches and a setting that sells them", "url": "https://jefclaes.be/2014/09/porsches-and-setting-that-sells-them.html", "published_at": "2014-09-02T20:24:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329928185139", "title": "Solomon, the architect", "url": "https://jefclaes.be/2014/08/solomon-architect.html", "published_at": "2014-08-26T17:52:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329928fbbf7d", "title": "Thinking No Computers", "url": "https://jefclaes.be/2014/08/thinking-no-computers/", "published_at": "2014-08-19T18:09:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329929cd3fbd", "title": "Paper notes: A Study and Toolkit for Asynchronous Programming in C#", "url": "https://jefclaes.be/2014/06/paper-notes-study-and-toolkit-for.html", "published_at": "2014-06-08T16:33:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992a5d2f52", "title": "Not about the UI and the database", "url": "https://jefclaes.be/2014/06/not-about-ui-and-database.html", "published_at": "2014-06-01T15:55:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992ae6f927", "title": "Eventual consistency in the Wild West", "url": "https://jefclaes.be/2014/05/eventual-consistency-in-wild-west.html", "published_at": "2014-05-25T16:01:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992bdb7cee", "title": "NCrafts Eventstorming slides", "url": "https://jefclaes.be/2014/05/ncrafts-eventstorming-slides.html", "published_at": "2014-05-16T13:22:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992c23c2e4", "title": "What if we stored events instead of state? - slides", "url": "https://jefclaes.be/2014/05/what-if-we-stored-events-instead-of.html", "published_at": "2014-05-12T15:41:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992c515e86", "title": "Glueing the browser and POS devices together", "url": "https://jefclaes.be/2014/05/glueing-browser-and-pos-devices-together.html", "published_at": "2014-05-04T16:23:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992d47917a", "title": "Solving Mavericks with VMware Fusion 6 and Windows 8.1 hangs", "url": "https://jefclaes.be/2014/04/solving-mavericks-with-vmware-fusion-6.html", "published_at": "2014-04-21T10:07:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992dec2c70", "title": "Rebinding a knockout view model", "url": "https://jefclaes.be/2014/04/rebinding-knockout-viewmodel.html", "published_at": "2014-04-06T16:43:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992e8ba31d", "title": "Sending commands from a knockout.js view model", "url": "https://jefclaes.be/2014/03/sending-commands-from-knockoutjs-view.html", "published_at": "2014-03-23T17:31:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992ecc72f3", "title": "Building a live dashboard with some knockout", "url": "https://jefclaes.be/2014/03/building-live-dashboard-with-some.html", "published_at": "2014-03-16T20:23:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32992ee6c1ca", "title": "Tests as part of your code", "url": 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"2013-11-24T17:08:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32993595aa8b", "title": "Event storming workshop slides", "url": "https://jefclaes.be/2013/11/event-storming-workshop-slides.html", "published_at": "2013-11-17T18:56:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299365c8dbf", "title": "An event store with optimistic concurrency", "url": "https://jefclaes.be/2013/11/an-event-store-with-optimistic.html", "published_at": "2013-11-10T17:25:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329937320949", "title": "Event source all the things?", "url": "https://jefclaes.be/2013/11/event-source-all-things.html", "published_at": "2013-11-03T17:45:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329937d54b09", "title": "Event projections", "url": "https://jefclaes.be/2013/10/event-projections.html", "published_at": "2013-10-27T16:43:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32993827e099", "title": "An event store", "url": "https://jefclaes.be/2013/10/an-event-store.html", "published_at": "2013-10-20T15:30:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299389c39df", "title": "An event sourced aggregate", "url": "https://jefclaes.be/2013/10/an-event-sourced-aggregate.html", "published_at": "2013-10-13T16:36:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329939757c09", "title": "My understanding of event sourcing", "url": "https://jefclaes.be/2013/10/my-understanding-of-event-sourcing.html", "published_at": "2013-10-06T16:32:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-3299397b05e4", "title": "CZ The Trilogy", "url": "https://jefclaes.be/2013/09/cz-trilogy.html", "published_at": "2013-09-29T16:15:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329939aaca84", "title": "Actor Model in COBOL", "url": "https://jefclaes.be/2013/09/actor-model-in-cobol.html", "published_at": "2013-09-22T14:38:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-329939b0d356", "title": "Slides from my talk on the Ubiquitous Language", "url": "https://jefclaes.be/2013/09/slides-from-my-talk-on-ubiquitous.html", "published_at": "2013-09-15T14:34:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32993aa17931", "title": "The first DDDBE Modellathon", "url": "https://jefclaes.be/2013/09/the-first-dddbe-modellathon.html", "published_at": "2013-09-06T11:24:00+00:00" }, { "id": "01a0878c-6767-701c-8f57-32993ad4c09d", "title": "Inheritance is like Jenga", "url": "https://jefclaes.be/2013/08/inheritance-is-like-jenga.html", "published_at": "2013-08-25T16:18:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb01eebcb0", "title": "But I already wrote it", "url": "https://jefclaes.be/2013/08/but-i-already-wrote-it.html", "published_at": "2013-08-18T14:24:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb02309a2d", "title": "Eventual consistent domain events with RavenDB and IronMQ", "url": "https://jefclaes.be/2013/08/eventual-consistent-domain-events-with.html", "published_at": "2013-08-15T12:03:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb02901647", "title": "When your commands spell CUD", "url": "https://jefclaes.be/2013/08/when-your-commands-spell-cud.html", "published_at": "2013-08-04T17:08:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb033b501f", "title": "The last cowboy", "url": "https://jefclaes.be/2013/07/to-live-die-in-la.html", "published_at": "2013-07-16T03:46:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb034f8b2a", "title": "The road goes on forever", "url": "https://jefclaes.be/2013/07/the-road-goes-on-forever.html", "published_at": "2013-07-15T02:51:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb04117e30", "title": "The long highway", "url": "https://jefclaes.be/2013/07/the-long-highway.html", "published_at": "2013-07-12T05:13:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb047f7ac9", "title": "Stairway to heaven", "url": "https://jefclaes.be/2013/07/stairway-to-heaven.html", "published_at": "2013-07-10T05:04:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb04edd7fd", "title": "She said yes!", "url": "https://jefclaes.be/2013/07/she-said-yes.html", "published_at": "2013-07-09T05:42:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb05d86cc3", "title": "Fireworks, Tequila and Silvertown Blues", "url": "https://jefclaes.be/2013/07/fireworks-tequila-and-silvertown-blues.html", "published_at": "2013-07-07T04:30:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb06cb3bfd", "title": "Multiplayer Enterprise Architect", "url": "https://jefclaes.be/2013/06/multiplayer-enterprise-architect.html", "published_at": "2013-06-30T15:00:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb073449f9", "title": "Not handling edge cases, making them explicit instead", "url": "https://jefclaes.be/2013/06/not-handling-edge-cases-making-them.html", "published_at": "2013-06-23T14:49:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb0769ab62", "title": "Angular.js and IE8 caching", "url": "https://jefclaes.be/2013/06/angularjs-and-ie8-caching.html", "published_at": "2013-06-09T14:52:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb07705ecb", "title": "Accidental entities - what about the UI?", "url": "https://jefclaes.be/2013/06/accidental-entities-what-about-ui.html", "published_at": "2013-06-02T14:24:00+00:00" }, { "id": "01a0878c-6768-73f0-9f1f-37bb078b7dbe", "title": "Accidental entities - you don't need that identity", "url": "https://jefclaes.be/2013/05/accidental-entities-you-dont-need-that.html", "published_at": "2013-05-26T14:27:00+00:00" } ] posts Claim your blog

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2026

Into the middlegame original ↗

22 May 2026

2018

GES scavenging and the hidden cost of link events original ↗

12 Aug 2018

Amazon Redshift - Fundamentals original ↗

1 May 2018

Consumed in 2017 original ↗

3 Jan 2018

2017

Passing the AWS Certified Solutions Architect exam original ↗

15 Dec 2017

Fast projections original ↗

30 Jul 2017

From human decisions, to suggestions to automated decisions original ↗

23 Jul 2017

How to organize a meetup original ↗

13 Feb 2017

Printing money - hacking loyalty points original ↗

11 Feb 2017

Everyone has to serve somebody, but software has to serve more than one original ↗

13 Jan 2017

2016

Consumed in 2016 original ↗

27 Dec 2016

Commands and events with JustSaying and AWS original ↗

18 Sept 2016

My InfoQ interview on DDD, events and legacy original ↗

21 Aug 2016

Pieter Hintjens original ↗

27 Apr 2016

Using a batch layer for fast(er) aggregations original ↗

24 Apr 2016

Notifications from an event log original ↗

17 Apr 2016

Functional one-liner for running totals in C#original ↗

28 Mar 2016

Consumed in 2015 original ↗

1 Jan 2016

2015

Visualizing event streams original ↗

20 Dec 2015

Slides from my talk "Evil by Design" at Build Stuff original ↗

18 Nov 2015

Defining big wins original ↗

16 Nov 2015

Bulk SQL projections with F# and type providers original ↗

18 Oct 2015

Aspect ratio calculation original ↗

11 Sept 2015

Basic casino math original ↗

22 Jun 2015

Consumed: Queries and projections (F#)original ↗

24 May 2015

Consumed: Handling commands (F#)original ↗

17 May 2015

Finding unused code (F#)original ↗

26 Apr 2015

Consumed: Parsing command line arguments (F#)original ↗

19 Apr 2015

Checked errors in F#original ↗

29 Mar 2015

Scaling promotion codes original ↗

15 Mar 2015

Domain Language: The Playthrough Bonus original ↗

23 Feb 2015

Side by side original ↗

15 Feb 2015

Averages are not good enough (F#)original ↗

18 Jan 2015

Consumed in 2014 original ↗

11 Jan 2015

2014

TDD as the crack cocaine of software original ↗

28 Dec 2014

Spinning the wheel: clustering and near misses original ↗

14 Dec 2014

Spinning the wheel: manipulating the odds original ↗

11 Dec 2014

Spinning the wheel original ↗

9 Dec 2014

Hot aggregate detection using F#original ↗

16 Nov 2014

Splitting hot aggregates original ↗

9 Nov 2014

Programmatically force create a new LocalDB database original ↗

26 Oct 2014

Print out the maximum depth of recursion allowed original ↗

19 Oct 2014

Read an Event Store stream as a sequence of slices using F#original ↗

5 Oct 2014

The road to Großglockner original ↗

14 Sept 2014

Northbound again original ↗

10 Sept 2014

Tolkien's inspiration original ↗

7 Sept 2014

Porsches and a setting that sells them original ↗

2 Sept 2014

Solomon, the architect original ↗

26 Aug 2014

Thinking No Computers original ↗

19 Aug 2014

Paper notes: A Study and Toolkit for Asynchronous Programming in C#original ↗

8 Jun 2014

Not about the UI and the database original ↗

1 Jun 2014

Eventual consistency in the Wild West original ↗

25 May 2014

NCrafts Eventstorming slides original ↗

16 May 2014

What if we stored events instead of state? - slides original ↗

12 May 2014

Glueing the browser and POS devices together original ↗

4 May 2014

Solving Mavericks with VMware Fusion 6 and Windows 8.1 hangs original ↗

21 Apr 2014

Rebinding a knockout view model original ↗

6 Apr 2014

Sending commands from a knockout.js view model original ↗

23 Mar 2014

Building a live dashboard with some knockout original ↗

16 Mar 2014

Tests as part of your code original ↗

9 Mar 2014

Alternatives to Udi's domain events original ↗

2 Mar 2014

Strategic DDD in a nutshell original ↗

23 Feb 2014

DDDBE slides on the Ubiquitous Language original ↗

16 Feb 2014

Reading an EventStore stream using JavaScript original ↗

9 Feb 2014

Thinking in Systems original ↗

2 Feb 2014

Repositories, where did we go wrong?original ↗

26 Jan 2014

new YearPassed(2013);original ↗

19 Jan 2014

Happiness before success original ↗

12 Jan 2014

Command and event semantics original ↗

5 Jan 2014

2013

2013's most read posts original ↗

29 Dec 2013

Databases are growing on me original ↗

22 Dec 2013

Buildstuff 2013 original ↗

15 Dec 2013

Book review: Antifragile original ↗

8 Dec 2013

Observations over assumptions original ↗

24 Nov 2013

Event storming workshop slides original ↗

17 Nov 2013

An event store with optimistic concurrency original ↗

10 Nov 2013

Event source all the things?original ↗

3 Nov 2013

Event projections original ↗

27 Oct 2013

An event store original ↗

20 Oct 2013

An event sourced aggregate original ↗

13 Oct 2013

My understanding of event sourcing original ↗

6 Oct 2013

CZ The Trilogy original ↗

29 Sept 2013

Actor Model in COBOL original ↗

22 Sept 2013

Slides from my talk on the Ubiquitous Language original ↗

15 Sept 2013

The first DDDBE Modellathon original ↗

6 Sept 2013

Inheritance is like Jenga original ↗

25 Aug 2013

But I already wrote it original ↗

18 Aug 2013

Eventual consistent domain events with RavenDB and IronMQ original ↗

15 Aug 2013

When your commands spell CUD original ↗

4 Aug 2013

The last cowboy original ↗

16 Jul 2013

The road goes on forever original ↗

15 Jul 2013

The long highway original ↗

12 Jul 2013

Stairway to heaven original ↗

10 Jul 2013

She said yes!original ↗

9 Jul 2013

Fireworks, Tequila and Silvertown Blues original ↗

7 Jul 2013

Multiplayer Enterprise Architect original ↗

30 Jun 2013

Not handling edge cases, making them explicit instead original ↗

23 Jun 2013

Angular.js and IE8 caching original ↗

9 Jun 2013

Accidental entities - what about the UI?original ↗

2 Jun 2013

Accidental entities - you don't need that identity original ↗

26 May 2013