In this section you will find EURA NOVA’s latest news and activities.
In this second part I welcome Nicolas Degroodt who explains how he has extended the YCSB for implementing TPC-C benchmark for NoSQL. In this post we call DBMS a storage framework whether it is RDBMS or a NoSQL.
In this post I would like to speak about two master theses that EURA NOVA is managing with the Faculty of Science Engineering of the Université Libre de Bruxelles (ULB) and with the Université Catholique de Louvain (UCL). The two students have been working on the same topic: the elasticity of data storage on the cloud. The first cool stuff to notice is that they are working on two different aspects of the elasticity by taking different directions, but at the end of the day, by their two contributions they draw a complete picture of the NoSQL benchmarking in the cloud. In this post I will give you a preview of their work that should be published in June 2011.
If we look at the evolution of private cloud, we can clearly see a natural convergence between Data Center Management (DCM) and IaaS management. It is natural because it fits better to the enterprise organization. Let’s be clear, we are talking about large organization, having already data centers for their own IT or businesses. The Services and software department are focusing on the elastic applications they can build on top of the infrastructure management such as Eucalyptus , OpenStack or commercial solutions such as VCloud Director .
Today, we welcome Arthur Lessuise, a student in last year in Master in Computer Science at the Université Libre de Bruxelles (Belgium). He spent 6 weeks at Euranova R&D for its internship. He studied the ability to swap HDFS in Pig Latin by a NoSQL storage. This post is a summary of his amazing work. Enjoy!
I recently had the opportunity to attend the symposium entitled “What’s in a build? Best practice and Requirements” given by Henrik Lindberg (Cloudsmith ) and Nick Boldt (JBoss – RedHat ) at the Eclipse Summit Europe 2010 in Ludwigsburg . The goal was to brainstorm and discuss about the practices and current concerns when it comes to the build of Eclipse plug-ins, features or RCP applications, and the automatic execution of post-build processes such as testing.
This Tuesday 2nd of November, the Eclipse Symposium opened the first afternoon of the ESE 2010 . In this post we will give you an sightsee of the emergent projects presented during the session. The EMF symposium is mainly focus around demos of new projects and initiatives in the modeling world. Going further it gives an overview of the important projects and the next directions of the modeling projects.
Those recent years we have seen the NoSQL initiative emerging against the so-called “old, slow and legacy” relational DBs. But today the debate is extending with a newcomer “The New RDMS architecture”. The concept is simple, the RDMS architecture was developed a long time ago, at that time computer science, computers and processors were extremely different from what we can find today. Why are we not able to gather the recent researches in storage, distributed computing and threading system to re-design a modern RDMS?
During my career, I have seen a lot of companies, especially multi-national companies, being disrupted by internal wars, arguments between departments, jealousy between projects and much more that you can imagine. What’s really impressive after one day assisting at the Red Hat partner summit conferences, is the clear vision, direction and alignment of the whole Red Hat products and projects in the same and unique direction: enterprise, data-centre and cloud.
Sunday 2nd of May, Euranova is at Valencia, Spain, for the Red Hat EMEA partner summit. The ceremony was opened by Jim Whitehurst, the Red Hat CEO in a keynote on the open source opportunity. The key message in the keynote was that every three years we can see an inflexion point in IT, in which business models, technologies and the delivery model completely change. In these last years we have seen this inflexion and arrival of virtualization, cloud and social networking. This keynote described how this point influences the IT and how it brings new challenges. The keynote was organized in three sections: (1) the problem, (2) The Red Hat business and (3) The solution.
Even if the name is really meaningless, the NoSQL defines a new generation of Key/value pair storage. This initiative is gaining popularity but also maturity. The FOSDEM dedicated a complete day and dev. room for this subject. The wikipedia definition defines this movement as: “NoSQL is an umbrella term for a loosely defined class of non-relational data stores that break with a long history of relational databases and ACID guarantees. Data stores that fall under this term may not require fixed table schemas, and usually avoid join operations. The term was first popularised in early 2009. Trends in computer architectures are pressing databases in a direction that requires horizontal scalability. NoSQL-style data stores attempt to address this requirement. Prominent closed-source examples are Google‘s BigTable and Amazon‘s Dynamo. Several open-source variants exist including Facebook‘s Cassandra, Apache HBase, LinkedIn‘s Project Voldemort and many others.”
In the last post we considered the problem of the Integrated fast food management. In step 1, we designed the models and in step 2 we weaved them. As a result the application were developed just by weaving live-models. We finished the last post by asking ourselves how could we answer the Fast Food manager’s issues: the boss wanted to control the burger cooking rate according to current demand. In addition, soon, he will ask to include other contextual parameters, such as the number of available seats, or the location of the truck which delivers salads and burgers. How could we define a flexible, maintainable, and intelligent system? We proposed to use CEP concepts.
Last week we submitted a talk at Eclipse Con 2010 “Add Complex Event Processing to your EMF models: Super Size models Fast food demo“. This is a good opportunity for explaining the concepts and architecture exposed in the talk. Actually that’s a good continuation of the last post. Indeed, we saw the M2M principles and the reasons why we needed transformation support and tracking of modifications from live-models. Today we put all those things in practise and dive into a real application example with live models, going further we use Complex Event Processing for injecting “intelligence” in the application.
Today we dive into a technical and theoretical track on the model transformation. In this post we investigate the existing techniques in Eclipse M2M in order to transform models, going further we replace them in the live-Model context and define what do we need to design such applications. We also present the live Weaver developed by our colleague Olivier Moises, which enables to track model changes. We will see how this kind of framework can be used in live transformation.
Last week, I was at Devoxx and I attended to a speech of JF Arcan, the head architect of the Atmoshpere framework . While the new coming Servlet 3.0 Async provides
In , JF Arcand demonstrates how Atmosphere can be used to suspend a request but also broadcasting a message to all suspended threads. Atmoshpere defines the notion of broadcastable and topics.
A topic is a kind a message channel on which broadcastable servlet can listen. Later on, any other client can broadcast messages on this topic and then reaching all suspended-threads.
Today we had the first conference day at DEVOXX, the European JAVA meeting. The key note was, as usual, dedicated to new evolutions in the JAVA world. One of these topics was the new JAVA EE 6.0
I will inaugurate the EURA NOVA R&D director’s blog by a post on the Wazaabi framework. Actually it is a very good starting point to explain the development we led, in collaboration with Olivier Moises, about the live model UI.