Soirée Data – Cassandra, Spark, Scalabilité le mardi 19 janvier

L’atelier sur Go n’est pas encore passé que nous vous proposons déjà la prochaine soirée, spéciale data ! On a fait les choses en grands vu qu’on aura 2 intervenantes et une salle de 400 places, on peut donc accueillir tout le monde, donc parlez en autour de vous :  Lire la suite

Getting started with Spark in practice

Some months ago, we, Sam Bessalah and I organized a workshop via Duchess France to introduce Apache Spark and its ecosystem.

This post aims to quickly recap basics about the Apache Spark framework and it describes exercises provided in this workshop (see the Exercises part) to get started with Spark (1.4), Spark streaming and dataFrame in practice.

If you want to start with Spark and come of its components, exercises of the workshop are available both in Java and Scala  on this github account. You just have to clone the project and go! If you need help, take a look …

Cassandra et Spark, amis pour la vie…

Duy Hai Doan et Gerald Quintana seront lundi à Lyon pour une session autour des projets Apache Spark et Cassandra. Ils nous en disent plus sur l’utilisation conjointe de ces deux outils, alternative technique intéressante par rapport à l’éco-système classique Hadoop.

Cette interview a été préparée par Agnès CREPET et Alexis HASSLER de la team du Lyon JUG.

Agnès et Alexis: Gerald et Duy Hai, pouvez-vous vous présenter ?

Duy Hai: Je m’appelle Duy Hai et je suis évangéliste technique pour Datastax, l’entreprise commerciale derrière Apache Cassandra.

Je partage mon temps entre donner des présentations/meetups/talks sur Cassandra, développer sur …

Predict your activity using your Android, Cassandra and Spark

Lately, I started a new sport activity: running. When you run, you get really curious about the acceleration, the distance, the elevation and other metrics you can analyse when you practice this kind of sport. As a runner, I started using phone application (runkeeper) and recently I bought a Garmin Watch so I can get more information about my running sessions.
But how this kind of application analyse data and compute all this metrics?
Let’s focus on one metrics: proper acceleration.

What is proper acceleration?

Proper acceleration or physical acceleration is the acceleration it experiences relative to freefall and is …

Analyze accelerometer data with Apache Spark and MLlib

The past months I grew some interest in Apache Spark, Machine Learning and Time Series, and I thought of playing around with it.

In this post I will explain how to predict user’s physical activity (like walking, jogging, sitting…) using Spark, the Spark-Cassandra connector and MLlib.

The entire code and data sets are available on my github account.

This post is inspired from the WISDM Lab’s study and data (not cleaned) come from here.

A FEW WORD ABOUT APACHE SPARK & CASSANDRA

Apache Spark started as a research project at the University of California, Berkeley in 2009 …