The Blog

Benefits of a multi-layer system

Posted by Viktor Kozlovszky on Thursday, 19 December 2019

Designing a multi-layer system is not rocket science, the difficulty can lie in selecting the right technologies. The main concept behind the design is to have better control and fine tuning of the components . This blog post will discuss the benefits & limitations of implementing this type of design and our practical experience gained from using it for the Open Days reservation system, which helped to welcome 75.000 people on our site and was hosted on the Oracle cloud using their cloud services.

Authored By: Viktor Kozlovszky

Published By: CERN IT-DB-DAR

Internationalization of the 2019 Open Days reservation system

Posted by Viktor Kozlovszky on Tuesday, 12 November 2019

International organisations can have multiple official languages, in these casesusually their workflows/processes are designed to support that. CERN is one of those organisations, it's official languages are French and English. Therefore one of our tasks was to make the Open Days reservation system bilingual. In this article you will read about the choices we made to internationalize the system, what obstacles we faced and what solution we went for.

Authored By: Viktor Kozlovszky, Thomas Løkkeborg

Published By: CERN IT-DB-DAR

Open Days reservation system's high level overview - 2019

Posted by Viktor Kozlovszky on Tuesday, 29 October 2019

The LHC has a schedule of maintenance and performance upgrades. During these longer shutdowns CERN holds its major Open Days events. These allow the general public to visit areas normally restricted and used for research activity. Previous events have seen daily over 35k people visiting. To hold a big impact event successfully, certain preparations and arrangements are necessary. Our team’s responsibility was to deliver a reliable and highly available reservation system. This article gives a high level overview about the work that has been done and links together technical articles written about the Open Days reservation application.

Authored By: Viktor Kozlovszky

Published By: CERN IT-DB-DAR

Internationalization: concepts and implementations

Posted by Viktor Kozlovszky on Wednesday, 23 October 2019

We are in an era where lots of things can be achieved with just a few clicks and quick typing on the web. This simple and fast information exchange has made this method become a standard form of communication. The web removes physical boundaries and allows people with different nationalities and mother tongues to interact. Therefore it has become very important that all parties understand the information flowing through this channel. To provide the same experience for speakers of all other languages it has become essential to design websites with internationalization (later as "i18n"). The goal for this post is to give a better understanding about i18n and about the concepts behind the different framework implementations.

Authored By: Viktor Kozlovszky, Thomas Løkkeborg
Published By: CERN IT-DB-DAR

Keeping your logs clean with Apache Tomcat 9, log4j2 and spring-boot

Posted by Luis Rodriguez ... on Tuesday, 26 March 2019

These last days I've been playing with Apache Tomcat 9 and log4j2. You may wonder why I want to change the good an old Tomcat JULI. Well, although I love the simplicity of its configuration and the fact that JULI works, log4j2 offers a big variety of appenders that make it very interesting. Also I prefer the way of how log4j2 rolls the files, keeping the original name un-touched (e.g.

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