YaJUG: Cassandra

Jeudi 2 octobre 2014 de 18:00 à 20:00  –  Luxembourg City, Luxembourg

18H00 : Introduction à Cassandra – Duy Hai DOAN (DataStax)

Cassandra est la base NoSQL orientée colonnes derrière les grandes entreprises comme Netflix, Sony Entertainment, Apple …
Une première session couvre la présentation générale de Cassandra et de son architecture. La deuxième session aborde le modèle de données et les bonnes pratiques de modélisation: comment passer du monde SQL au monde NoSQL avec Cassandra.

19H10 : Outillage de la solution Cassandra – Michaël Figuière (DataStax)

Présentation des outils pour aider le développeur Java à travailler efficacement avec Cassandra.

See what are the locations of the network attacks against Luxembourg

See what are the locations of the network attacks against Luxembourg http://map.circl.lu/ 


CIRCL (Computer Incident Response Center Luxembourg) is the national Computer Security Incident Response Team (CSIRT – CERT) coordination center for the Grand-Duchy of Luxembourg.

CIRCL is operated by SMILE (“security made in Lëtzebuerg”), a State funded “groupement d’intérêt économique” (GIE), designed to improve information security and create new opportunities for Luxembourg.

TaDaWeb is automating what you do everyday on the Internet

TaDaweb is Automating what you do everyday on the Internet.http://www.tadaweb.com/ 



Made In Luxembourg:


Hack.lu 2012

Hack.lu is an open convention/conference where people can discuss about computer security, privacy,

information technology and its cultural/technical implication on society.

The aim of the convention is to make a bridge of the various actors in the computer security world.

The conference takes place:

  1. at Parc Hotel Alvisse in Luxembourg

  2. the 23-25 October 2012


Some of the invited talks and workshop are now announced(follow this link for more details)


Luxembourg Startup Weekend 2012


Luxembourg Startup Weekend 2012

Startup Weekend

Friday, 16 November 2012 at 18:00 – Sunday, 18 November 2012 at 23:00 (CET)


9, avenue des Hauts-Fourneaux; L-4362 Esch-sur-Alzette Grand Duchy of Luxembourg – www.technoport.lu


All details available at luxembourg.startupweekend.org

Ever wondered what it takes to be an entrepreneur?

The professional and personal challenges, the high and lows, the failures and the success?

Startup Weekend is a global grassroots movement of active and empowered entrepreneurs who are learning the basics of founding startups and launching successful ventures. It is the largest community of passionate entrepreneurs with over 400 past events in 100 countries around the world in 2011.

The non-profit organization is headquartered in Seattle, Washington but Startup Weekend organizers and facilitators can be found in over 200 cities around the world. From Mongolia to South Africa to London to Brazil, people around the globe are coming together for weekend long workshops to pitch ideas, form teams, and start companies.

All Startup Weekend events follow the same basic model: anyone is welcome to pitch their startup idea and receive feedback from their peers. Teams organically form around the top ideas (as determined by popular vote) and then it’s a 54 hour frenzy of business model creation, coding, designing, and market validation. The weekends culminate with presentations in front of local entrepreneurial leaders with another opportunity for critical feedback.

Whether entrepreneurs found companies, find a cofounder, meet someone new, or learn a skill far outside their usual 9-to-5, everyone is guaranteed to leave the event better prepared to navigate the chaotic but fun world of startups. If you want to put yourself in the shoes of an entrepreneur, register now for the best weekend of your life!

MongoDB 2.0.7 has been released

MongoDB 2.0.7 is out and ready for production deployment.

There are no changes from 2.0.7-rc1. This release contains only fixes since 2.0.6.
In particular, this version contains important fixes for Windows users:
Other highlights include:
SERVER-6414 – improved memory usage when building indexes
SERVER-6391 – improve concurrency with large number of connections
SERVER-6512 – improve mongos robustness when resizing replica set
SERVER-6305 – command-line option to turn off auto-splitting on particular mongoses

HaxoGreen 2012 starting next July 26th

HaxoGreen 2012 is the third iteration of the annual four-day outdoor camp in early summer 2012 organized by syn2cat. This rather informal and cosy hacker camp takes place from July 26th – 29th 2012.

The camp is organized by the community around Luxembourg’s hacker community syn2cat. We appreciate your participation, be it by holding a lecture, a workshop or presenting your projects and ideas during a 10 minutes lightning talk.

More information



The camp is located at the scouts’ ground Belvedère near the city of Dudelange in the southern region of Luxembourg/Europe. The camping ground features adequate restrooms and shower facilities. Indoor rooms for lectures and workshops are also available.

Thibaut Britz (Trendiction) winning CYEL 2012

“Creating significant and positive changes, reach CYEL”

The Creative Young Entrepreneurs Luxembourg (CYEL) is a project organized by Junior Chamber International Luxembourg (JCI Luxembourg) to promote initiatives which create significant positive changes. The 2012 edition was the 6th Edition.

The first prize goes to Thibaut Britz, founder Trendiction now a leader in data aggregation and search technology on the Internet. The second place on the podium back to Sven Breckler, founder of BeeWee Media, a company developing innovative web applications. Fabrice Dewasmes, CEO of the company Neopixl, which develops projects with high added value for mobile devices, closes the classification, with the bronze medal.

ln addition, the 3 national finalists will participate to the worldwide 2012 JCI Creative Young Entrepreneur Award (CYEA).

More information: http://www.cyel.lu/

Hack.lu 2012 8th edition

Call for Papers for hack.lu 2012 is now out! – You can register and submit your paper via the CFP website.

Hack.lu is an open convention /conference where people can discuss about computer security, privacy, information technology and its cultural/technical implication on society. The aim of the convention…


The conference will take place in Luxembourg (that’s the 8th edition) the 23-25 October 2012 and everyone is welcome to submit a talk/paper to the conference on interesting security topics.



Who’s Afraid of Greater Luxembourg?

Who’s Afraid of Greater Luxembourg?

Original article from NYTimes

Luxembourg is about as cuddly as countries come: prosperous, picturesque and delightfully tiny. At 999 square miles, it is the smallest but one of the European Union states [1]. You could drive its length (55 miles) or its width (35 miles) in less time than it takes to watch a feature-length movie — provided you don’t stop at one of the many touristy villages or vineyards along the way. The capital, also called Luxembourg [2], is a cozy city of barely 100,000 souls; its major problem is not drugs or urban decay, but the apparently unfixable fact that it’s rather boring [3].

Luxembourg is the only country in the world ruled by a grand duke[4], which sounds more like the setup to a fairy tale than a real-world constitutional arrangement. The grand duchy is a founding member of the European Union and NATO [5], and hosts the European Court of Justice, Eurostat (the European Statistical Office), the Secretariat of the European Parliament and other supranational institutions. Luxembourg expects to be listened to and taken seriously by its international peers. And it is: of its last four prime ministers, one went on to become president of the United Nations General Assembly, another of the European Commission, and a third of the Eurogroup [6].

All that from a country less populous than Hanover, Germany’s 13th largest city. It is so small that even tiny Belgium is able to smirk about the grand duchy’s size, replicating the scorn heaped upon itself by its own larger neighbors. Why is Luxembourg so determined to punch above its weight? Could it be that it has a grander idea of itself than its neighbors have? An elevated sense of self is a useful survival tool, for countries as well as people. But Luxembourgers could argue that they don’t have delusions of grandeur, but rather memories of grandeur. Once upon a time, you see, there was a Greater Luxembourg.

Joe Burgess/The New York Times

The state’s roots go back to 963 A.D., when Siegfried, count of the Ardennes, acquired Lucilinburhuc, an old Roman fort with a Frankish name [7]. Over the next few centuries, the House of Luxembourg would choose its wars and wives wisely, and the County of Luxembourg would grow to encompass an area four times the size of the present grand duchy.

Indeed, Luxembourg’s international ambitions, mainly within the vast and chaotic German Empire, are almost as old as the house itself. It produced three Holy Roman emperors, several kings of Bohemia and a fair share of archbishops. Perhaps Luxembourg’s most lasting impression on the empire was the Golden Bull of 1365, a decree that would determine how Holy Roman emperors would be elected for over four centuries, until the empire’s dissolution in 1806. It was issued by Emperor Charles IV of Luxembourg, king of Bohemia [8], who in 1354 elevated his ancestral county to a duchy.

Unfortunately, Luxembourg soon lost control of its own fate. In 1441 Duchess Elizabeth sold it to Burgundy; it later passed into Hapsburg hands and was eventually integrated into the Netherlands as one of its 17 provinces. Lack of an independent dynasty meant an end to Luxembourg’s influence in the world, and it eventually fell under the geopolitical knife. Like once enormous Poland, to the east, it suffered three partitions, resulting in the bonsai nation it currently is.

In fact, the three countries surrounding present-day Luxembourg all own territory that once belonged to the Duchy of Luxembourg, and they all at one point or another demanded its total annexation into their own territory. In 1659, the Treaty of the Pyrenees [9] accorded just over 400 square miles (or 10 percent of its size at the time) of Luxembourg to France, which gained the fortified cities of Stenay, Thionville and Montmédy. At the Congress of Vienna in 1815, Prussia got the fort at Bitburg, and all lands west of a new riverine border[10], further reducing Luxembourg by 880 square miles (or an additional 24 percent of the original). Part of these lands would go to Belgium after the Treaty of Versailles in 1919.

But the worst loss occurred in 1839, when the Netherlands accepted the Treaty of London, formally recognising Belgian independence. In return, the Dutch king William I got to keep the eastern halves of Limburg and Luxembourg, provinces which had nevertheless cheered on Belgium’s secession. As a result, the grand duchy lost its western half (1,687 square miles, or 42 percent of its territory at its largest extension) to Belgium, which still has a province also called Luxembourg. William remained grand duke of the eastern half of Luxembourg, establishing a personal union [11] with the Netherlands that would last until 1890.

And of course the country didn’t avoid the horrors of 20th century Europe, either: in the first half of the 20th century, Germany brutally occupied Luxembourg twice, annexing it outright the second time.

That list of unfortunate events would be enough justification for a grand duchy to be brimming with resentment, with local politicians falling over one another demanding the return of the lost territories, a condition common to many once grand nations. But political extremism is a fringe movement in Luxembourg politics —probably so small that it can be identified as that one guy fuming behind his Weissbier in a bar in Echternach.

Instead, Luxembourg has sublimated irredentism, that unpalatable side dish of nationalism, into something much more powerful. Outwardly, the Luxembourgers are the best students of the European class. Their national motto, rendered in Luxembourgish, is: “Mir wölle bleiwe, wat mir sin” (“We want to stay what we are”), a good summary of the folksy, don’t-rock-the-boat conservatism that dominates the political scene.

But the real slogan might just as well be: “We want to become what we were”: European power brokers, as they were in the Middle Ages. Luxembourg is stealthily positioning itself as the central pivot of a new supernational zone within Europe, generically called the Grande Région.

This Greater Region of Luxembourg is one of Europe’s many cross-border cooperations called Euroregions, welding Luxembourg with the Walloon region of Belgium (including its German-speaking area), the French region of Lorraine, and the German states of Saarland and Rhineland-Palatinate. The Greater Region [12] is much wider than the old Greater Luxembourg, comprising an area of 25,250 square miles and counting more than 11 million inhabitants [13].

Ostensibly only a forum to discuss economic, social, cultural and tourist affairs, the Greater Region of Luxembourg could nevertheless be seen as the inchoate resurrection of an ancient European entity: Middle Francia [14], the centerpiece of Charlemagne’s empire. It’s been a long time coming: While the empire’s eastern and western parts later evolved into Germany and France, Middle Francia — extending in a narrow corridor from the North Sea to the Mediterranean — did not survive its creation at the Treaty of Verdun, in 843 A.D., for very long.

Perhaps this is Luxembourg’s insurance policy in case the European Union goes to the dogs. Plan A is to be the best student in the European class, at which is excels. Plan B is to recreate Middle Francia, but this time as a viable third way between France and Germany. Middle Francia’s undoing was its lack of cultural cohesion. Perhaps the Luxembourgers, fluently trilingual, can turn that defect around to an advantage. And maybe one day, Europeans tired of a superstate dominated by France and Germany will resolutely declare, from Amsterdam to Athens: “Mir wölle bleiwe, wat mir sin.”

Frank Jacobs is a London-based author and blogger. He writes about cartography, but only the interesting bits.