Johan Åhlén

Johan Åhlén's blog about life, universe and everything.

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A volcano presentation at Microsoft BI Conference
Sometimes things turn out in a quite different way than expected. I looked forward to visit the Microsoft BI Conference in Stockholm and listen to Rafal Lukawiecki, but ended up doing a presentation there myself... The background is that Rafal is doing...
I will speak about StreamInsight at Miracle Open World in Denmark
Beat the stock market with StreamInsight StreamInsight is one of the main news of SQL Server 2008 R2. It's a platform for Complex Event Processing (CEP) that enables processing of high speed event streams using familiar tools such as Visual Studio...
I will speak about StreamInsight at TechDays 2010 in Sweden
StreamInsight is one of the main news of SQL Server 2008 R2. It's a platform for Complex Event Processing (CEP) that enables processing of high speed event streams using familiar tools such as Visual Studio, C# and LINQ. CEP is a technology that is...
Algorithmic Trading using Complex Event Processing (CEP) and Data Mining
Algorithmic Trading is automated trading done by computer programs (algorithms) that react to patterns in financial market data or financial news. As of 2009, high frequency trading firms accounted for 73% of all US equity trading volume. Several different...
Exploring Codename "Dallas" with PowerPivot
A couple of weeks ago, Microsoft opened up their Codename "Dallas" website . The service is by invitation only, but there is a mail address on their site where you can ask for an invitation code. What is Codename "Dallas"? - It is...
Innovation - why companies need skunks
Do you have any skunks in your organisation? You should be happy if you have! Former CEO of Ericsson, Sven-Christer Nilsson, writes in his book that all great successes within Ericsson (like IP-telephony and mobile phones) have originated from persons...
InstantCube - building a SQL Server Modeling DSL application for quick cube development
Introduction This article describes how to build a tool , InstantCube, that uses SQL Server Modeling Services that drastically reduces the development time of simple Analysis Services cubes. Using the tool you can accomplish with a few lines of DSL (Domain...
Article published on SQLServerCentral.com
Welcome to read my article, Improving Cube Performance with Precalculated Aggregations , on SQLServerCentral.com. http://www.sqlservercentral.com/articles/SSAS/68309/ More articles will be coming when I have the time to write.
PowerPivot announced as real name for project Gemini
Microsoft just announced the real name for the BI Self Service component (project "Gemini" ) of SQL Server 2008 R2 . According to the new web site, PowerPivot is: "PowerPivot provides business users with BI at their fingertips while enabling...
Installing Reporting Services on Windows 7, Vista or Windows Server 2008
I recently had to reinstall Reporting Services 2008, and had to remind myself how to set it up correctly. Installing Reporting Services on Vista, and later operating systems, can be tricky. I've seen several forum posts of people spending days on...
A first look at SQL Server 2008 R2 - StreamInsight
Background A couple of weeks ago, the second CTP for SQL Server 2008 R2 was released. I downloaded it immediately. Still the product is far from finished, and the CTP didn't contain any preview of the "Gemini" component, but I could at least...