Published articles
New TDP website launched
Categories: Big Data | Tags: Programming, Ansible, Hadoop, Python, TDP
The new TDP (Trunk Data Platform) website is online. We invite you to browse its pages to discover the platform, stay informed, and cultivate contact with the TDP community. TDP is a completely openā¦
By David WORMS
Oct 3, 2023
Data platform requirements and expectations
Categories: Big Data, Infrastructure | Tags: Data Engineering, Data Governance, Data Analytics, Data Hub, Data Lake, Data lakehouse, Data Science
A big data platform is a complex and sophisticated system that enables organizations to store, process, and analyze large volumes of data from a variety of sources. It is composed of severalā¦
By David WORMS
Mar 23, 2023
Adaltas Summit 2022 Morzine
Categories: Big Data, Adaltas Summit 2022 | Tags: Data Engineering, Infrastructure, Iceberg, Container, Data lakehouse, Docker, Kubernetes
For its third edition, the whole Adaltas crew is gathering in Morzine for a whole week with 2 days dedicated to technology the 15th and the 16Th of september 2022. The speakers choose one of theā¦
By David WORMS
Jan 13, 2023
Traefik, Docker and dnsmasq to simplify container networking
Categories: Containers Orchestration, Infrastructure, Tech Radar | Tags: DNS, Gatsby, JAMstack, Linux, Docker, Network
Good tech adventures start with some frustration, a need, or a requirement. This is the story of how I simplified the management and access of my local web applications with the help of Traefik andā¦
By David WORMS
Nov 17, 2022
Nix package creation: install a not yet supported font
Categories: Hack | Tags: Learning and tutorial, Linux, Packaging, GitOps, NixOS, Open source
The Nix packages collection is large with over 60 000 packages. However, chances are that sometimes the package you need is not available. You must integrate it yourself. I needed for some fonts whichā¦
By David WORMS
Mar 29, 2022
JS monorepos in prod 6: CI/CD, continuous integration and deployment with Travis CI
Categories: DevOps & SRE, Front End | Tags: CI/CD, Monorepo, Node.js, Unit tests
Implementing continuous integration CI and continuous deployment (CD) on a monorepo is quite complex due to the diversity of multiple responsibilities between developers and the need to coordinateā¦
By David WORMS
Dec 6, 2021
Spring 2022 internship - building a Data Lab
Categories: Data Science, Learning | Tags: MongoDB, Spark, Argo CD, Elasticsearch, Internship, Keycloak, Kubernetes, OpenID Connect, PostgreSQL
Job Description Over the last few years, we developed the ability to use computers to process large amounts of data. The ecosystem evolved over a large offering of tools and libraries and the creationā¦
By David WORMS
Nov 24, 2021
CSV package for Node.js version 6
Categories: Node.js | Tags: Data Engineering, Refactoring, CSV, File Format, Release and features
Version 6 of the package for Node.js is released along its sub projects. Here are the latest versions: version , latest version was NPM version , latest version was NPM version , latest versionā¦
By David WORMS
Nov 15, 2021
Internship in Data Engineering
Categories: Front End, Learning | Tags: Metrics, Monitoring, Hive, Kafka, Delta Lake, Elasticsearch, IaC, Internship, Kubernetes, Streaming
Job Description Data is a valuable business asset. Some call it the new oil. The data engineer collects, transform and refine āāraw data into information that can be used by business analysts and dataā¦
By David WORMS
Oct 25, 2021
Internship in Web Technologies
Categories: Front End, Learning | Tags: DevOps, LDAP, React.js, CI/CD, Docker, GraphQL, IaC, Internship, Kubernetes, Node.js, OAuth2
Job Description As part of its Big Data activities, Adaltas Academy is an information-sharing platform bringing together articles, training content, and a knowledge base. The users of the platform areā¦
By David WORMS
Oct 14, 2021
Adaltas Summit 2021, 2nd edition in corsica
Categories: Adaltas Summit 2021, Learning | Tags: Ansible, Hadoop, Spark, Azure, Blockchain, Deep Learning, Docker, Terraform, Kubernetes, Node.js
For its second edition, the whole Adaltas crew is gathering in Corsica for a whole week with 2 days dedicated to technology the 23rd and the 24th of september 2021. After a year and a half of sanitaryā¦
By David WORMS
Sep 21, 2021
Running your Travis CI builds locally with Docker
Categories: DevOps & SRE, Front End | Tags: Bash, Tools, CI/CD, Node.js, Unit tests
Setting up the environment to run the tests on a CI/CD can take a few roundtrips between your host machine and the CI/CD running remotely. For every attempt, youāll have to commit and publish yourā¦
By David WORMS
Sep 6, 2021
Desacralizing the Linux overlay filesystem in Docker
Categories: Containers Orchestration, Infrastructure | Tags: DevOps, File system, Linux, Docker
Overlay filesystems (also called union filesystems) is a fundamental technology in Docker to create images and containers. They allow creating a union of directories to create a filesystem. Multipleā¦
By David WORMS
Jun 3, 2021
Bridging the DBnomics Swagger/OpenAPI schema with GraphQL
Categories: DevOps & SRE, Front End | Tags: Data Engineering, JAMstack, GraphQL, JavaScript, Node.js, REST, Schema
While redacting a long and fastidious document today, I came across DBnomics, an open platform federating economic datasets. Browsing its website and APIs, I found their OpenAPI schema (aka Swaggerā¦
By David WORMS
Apr 8, 2021
JS monorepos in prod 4: unit testing with Mocha and Should.js
Categories: DevOps & SRE, Front End | Tags: Automation, CI/CD, Git, GitOps, Monorepo, Node.js, Unit tests
Unit testing is essential for every long-term project and allows you to pull down functionalities of your code into isolated testable units. Indeed the main goal of a unit test is to verify if anā¦
By David WORMS
Feb 25, 2021
JS monorepos in prod 3: commit enforcement and changelog generation
Categories: DevOps & SRE, Front End | Tags: CI/CD, Git, JavaScript, Monorepo, Node.js, Release and features, Unit tests
Conventional Commits introduces a structured format for commit messages. It standardizes the messages among all the contributors. This makes them more readable and easy to automate. It simplifies theā¦
By David WORMS
Feb 2, 2021
JS monorepos in prod 2: project versioning and publishing
Categories: DevOps & SRE, Front End | Tags: CI/CD, Git, GitOps, JavaScript, Monorepo, Node.js, Release and features, Unit tests
One great advantage of a monorepo is to maintain coherent versions between packages and to automatize the version creation and the publication of packages. This article covers the versioning andā¦
By David WORMS
Jan 11, 2021
JS monorepos in prod 1: project initialization
Categories: DevOps & SRE, Front End | Tags: Git, GitOps, JavaScript, Monorepo, Node.js, Release and features
Every project journey begins with the step of initialization. When your overall project is composed of multiple projects, it is tempting to create one Git repository per project. In Node.js, a projectā¦
By David WORMS
Jan 5, 2021
OAuth2 and OpenID Connect for microservices and public applications (Part 2)
Categories: Containers Orchestration, Cyber Security | Tags: LDAP, Micro Services, CNCF, JavaScript Object Notation (JSON), OAuth2, OpenID Connect
Using OAuth2 and OpenID Connect, it is important to understand how the authorization flow is taking place, who shall call the Authorization Server, how to store the tokens. Moreover, microservices andā¦
By David WORMS
Nov 20, 2020
OAuth2 and OpenID Connect, a gentle and working introduction (Part 1)
Categories: Containers Orchestration, Cyber Security | Tags: Go Lang, JAMstack, LDAP, CNCF, Kubernetes, OAuth2, OpenID Connect
Understanding OAuth2, OpenID and OpenID Connect (OIDC), how they relate, how the communications are established, and how to architecture your application with the given access, refresh and id tokensā¦
By David WORMS
Nov 17, 2020
Plugin architecture in JavaScript and Node.js with Plug and Play
Categories: Front End, Node.js | Tags: Asynchronous, DevOps, Programming, Agile, JavaScript, Open source, Release and features
Plug and Play helps library and application authors to introduce a plugin architecture into their code. It simplifies complex code execution with well-defined interception points, also called hooksā¦
By David WORMS
Aug 28, 2020
Cloudera CDP and Cloud migration of your Data Warehouse
Categories: Big Data, Cloud Computing | Tags: Azure, Cloudera, Data Hub, Data Lake, Data Warehouse
While one of our customer is anticipating a move to the Cloud and with the recent announcement of Cloudera CDP availability mi-september during the Strata conference, it seems like the appropriateā¦
By David WORMS
Dec 16, 2019
InfraOps & DevOps Internship - build a Big Data & Kubernetes PaaS
Categories: Big Data, Containers Orchestration | Tags: DevOps, LXD, Hadoop, Kafka, Spark, Ceph, Internship, Kubernetes, NoSQL
Context The acquisition of a high-capacity cluster is in line with Adaltasā desire to build a PAAS-type offering to use and to provide Big Data and container orchestration platforms. The platforms areā¦
By David WORMS
Nov 26, 2019
Internship Data Science & Data Engineer - ML in production and streaming data ingestion
Categories: Data Engineering, Data Science | Tags: DevOps, Flink, Hadoop, HBase, Kafka, Spark, Internship, Kubernetes, Python
Context The exponential evolution of data has turned the industry upside down by redefining data storage, processing and data ingestion pipelines. Mastering these methods considerably facilitatesā¦
By David WORMS
Nov 26, 2019
Kerberos and Spnego authentication on Windows with Firefox
Categories: Cyber Security | Tags: Firefox, HTTP, FreeIPA, Kerberos
In Greek mythology, Kerberos, also called Cerberus, guards the gates of the Underworld to prevent the dead from leaving. He is commonly described as a three-headed dog, a serpentās tail, mane ofā¦
By David WORMS
Nov 4, 2019
Notes on the Cloudera Open Source licensing model
Categories: Big Data | Tags: CDSW, License, Cloudera Manager, Open source
Following the publication of its Open Source licensing strategy on July 10, 2019 in an article called āour Commitment to Open Source Softwareā, Cloudera broadcasted a webinar yesterday October 2ā¦
By David WORMS
Oct 25, 2019
Innovation, project vs product culture in Data Science
Categories: Data Science, Data Governance | Tags: DevOps, Agile, Scrum
Data Science carries the jobs of tomorrow. It is closely linked to the understanding of the business usecases, the behaviors and the insights that will be extracted from existing data. The stakes areā¦
By David WORMS
Oct 8, 2019
Gatsby.js, React and GraphQL for documentation websites
Categories: Adaltas Summit 2018, Front End | Tags: Gatsby, HTTP, JAMstack, React.js, SEO, API, GitOps, GraphQL, JavaScript, Markdown, Node.js
In the last few months, I have started to redesign some of our Open Source project websites. This includes the websites of the Node.js CSV project, the Node.js HBase client and the Nikita project, ourā¦
By David WORMS
Apr 1, 2019
Main advantages of GraphQL as an alternative to REST
Categories: Front End | Tags: gRPC, API, GraphQL, JavaScript Object Notation (JSON), Node.js, Registry, REST
GraphQL is based on a simple idea, moving the assembly of a request from the server to the client. The client sees the overall strongly-typed schema instead of multiple REST endpoints and he buildsā¦
By David WORMS
Nov 27, 2018
Node.js CSV version 4 - re-writing and performance
Categories: Node.js | Tags: CLI, Data Engineering, Refactoring, CSV, Release and features
Today, we release a new major version of the Node.js CSV parser project. Version 4 is a complete re-writing of the project focusing on performance. It also comes with new functionalities as well asā¦
By David WORMS
Nov 19, 2018
Managing User Identities on Big Data Clusters
Categories: Cyber Security, Data Governance | Tags: LDAP, Active Directory, Ansible, FreeIPA, IAM, Kerberos
Securing a Big Data Cluster involves integrating or deploying specific services to store users. Some users are cluster-specific when others are available across all clusters. It is not always easy toā¦
By David WORMS
Nov 8, 2018
One week to discuss technology in a Moroccan riad
Categories: Adaltas Summit 2018, Learning | Tags: CDSW, Gatsby, React.js, Flink, Hadoop, Knox, Data Science, Deep Learning, Kubernetes, Node.js
Adaltas organise the year its first conference between the 22 and 26 of October. On the agenda of these 5 days of conference: discuss technology in one of the most beautiful riad of Marrakech. Mix theā¦
By David WORMS
Oct 11, 2018
Deploying a secured Flink cluster on Kubernetes
Categories: Big Data | Tags: Encryption, Flink, HDFS, Kafka, Elasticsearch, Kerberos, SSL/TLS
When deploying secured Flink applications inside Kubernetes, you are faced with two choices. Assuming your Kubernetes is secure, you may rely on the underlying platform or rely on Flink nativeā¦
By David WORMS
Oct 8, 2018
Data Lake ingestion best practices
Categories: Big Data, Data Engineering | Tags: NiFi, Data Governance, HDF, Operation, Avro, Hive, ORC, Spark, Data Lake, File Format, Protocol Buffers, Registry, Schema
Creating a Data Lake requires rigor and experience. Here are some good practices around data ingestion both for batch and stream architectures that we recommend and implement with our customersā¦
By David WORMS
Jun 18, 2018
Essential questions about Time Series
Categories: Big Data | Tags: Grafana, Druid, HBase, Hive, ORC, Data Science, Elasticsearch, IOT
Today, the bulk of Big Data is temporal. We see it in the media and among our customers: smart meters, banking transactions, smart factories, connected vehicles ā¦ IoT and Big Data go hand in hand. Weā¦
By David WORMS
Mar 18, 2018
Publishing guidelines
Categories: DevOps & SRE | Tags: Arch Linux, KVM, VM, Vagrant, Markdown
This is as much a set of guidelines targeting everyone publishing content on the web as rules for reviewers to ensure no validation is forgotten before submitting for publication. It mostly targetsā¦
By David WORMS
Feb 28, 2018
Notes after Katacoda Training on Kubernetes Container Orchestration
Categories: Containers Orchestration, Learning | Tags: Helm, Ingress, Kubeadm, CNI, Micro Services, Minikube, Kubernetes
A few weeks ago, I dedicated two days to follow the turorials available on Katacoda, the interactive learning platform for Kubernetes or any other container orchestration platform. Iām sharing myā¦
By David WORMS
Dec 14, 2017
Micro Services
Categories: Cloud Computing, Containers Orchestration, Open Source Summit Europe 2017 | Tags: Mesos, DNS, Encryption, gRPC, Istio, Linkerd, Micro Services, MITM, Service Mesh, CNCF, Kubernetes, Proxy, SPOF, SSL/TLS
Back in the days, applications were monolithic and we could use an IP address to access a service. With virtual machines (VM), multiple hosts started to appear on the same machine with multiple appsā¦
By David WORMS
Nov 14, 2017
MariaDB integration with Hadoop
Categories: Infrastructure | Tags: Database, HA, MariaDB, Hadoop, Hive
During a workshop with one of our customers, Adaltas has identified a potential risk to use MariaDBās High Availability (HA) strategy. Since the customer selected Clouderaās CDH 5 distribution, theā¦
By David WORMS
Jul 31, 2017
Oracle DB synchrnozation to Hadoop with CDC
Categories: Data Engineering | Tags: CDC, GoldenGate, Oracle, Hive, Sqoop, Data Warehouse
This note is the result of a discussion about the synchronization of data written in a database to a warehouse stored in Hadoop. Thanks to Claude Daub from GFI who wrote it and who authorizes us toā¦
By David WORMS
Jul 13, 2017
Hive Metastore HA with DBTokenStore: Failed to initialize master key
Categories: Big Data, DevOps & SRE | Tags: Infrastructure, Hive, Bug
This article describes my little adventure around a startup error with the Hive Metastore. It shall be reproducable with any secure installation, meaning with Kerberos, with high availability enabledā¦
By David WORMS
Jul 21, 2016
EclairJS - Putting a Spark in Web Apps
Categories: Data Engineering, Front End | Tags: Jupyter, Spark, JavaScript
Presentation by David Fallside from IBM, images extracted from the presentation. Introduction Web Apps development has moved from Java to NodeJS and Javascript. It provides a simple and richā¦
By David WORMS
Jul 17, 2016
Hive, Calcite and Druid
Categories: Big Data | Tags: Business intelligence, Database, Druid, Hadoop, Hive
BI/OLAP requires interactive visualization of complex data streams: Real time bidding events User activity streams Voice call logs Network trafic flows Firewall events Application KPIs Traditionnalā¦
By David WORMS
Jul 14, 2016
Red Hat Storage Gluster and its integration with Hadoop
Categories: Big Data | Tags: GlusterFS, Red Hat, Hadoop, HDFS, Storage
I had the opportunity to be introduced to Red Hat Storage and Gluster in a joint presentation by Red Hat France and the company StartX. I have here recompiled my notes, at least partially. I willā¦
By David WORMS
Jul 3, 2015
A simple connect middleware to transpile CoffeeScript files
Categories: Hack, Node.js | Tags: Tools, CoffeeScript, Node.js
This new module called connect-coffee-script is a Connect middleware used to serve JavaScript files written in CoffeeScript. This middleware is to be used by connect or any Connect compatibleā¦
By David WORMS
Jul 4, 2014
Tutorial for creating and publishing a new Node.js module
Categories: Front End | Tags: Learning and tutorial, License, Mocha, NPM, Travis CI, CoffeeScript, GitHub, JavaScript, Node.js, Unit tests
In this tutorial, I provide complete instructions for creating a new Node.js module, writing the code in coffee-script, publishing it on GitHub, sharing it with other Node.js fellows through NPMā¦
By David WORMS
Dec 3, 2013
Crawl you website including login form with Phantomjs
Categories: Front End | Tags: Mocha, CoffeeScript, JavaScript, Node.js, Unit tests
With PhantomJS, we start a headless WebKit and pilot it with our own scripts. Said differently, we write a script in JavaScript or CoffeeScript which controls an Internet browser and manipulates theā¦
By David WORMS
Nov 27, 2013
Catch 'uncaughtException' error in your mocha test
Categories: Node.js | Tags: DevOps, Mocha, JavaScript, Unit tests
This isnāt the first time I faced this situation. Today, I finally found the time and energy to look for a solution. In your mocha test, letās say you need to test an expected āuncaughtExceptionā¦
By David WORMS
Oct 27, 2013
Remote connection with SSH
Categories: Cyber Security | Tags: Automation, HTTP, SSH
While teaching Big Data and Hadoop, a student asks me about SSH and how to use. Iāll discuss about the protocol and the tools to benefit from it. Lately, I automate the deployment of Hadoop clustersā¦
By David WORMS
Oct 2, 2013
Composants for CDH and HDP
Categories: Big Data | Tags: Flume, Hortonworks, Hadoop, Hive, Oozie, Sqoop, Zookeeper, Cloudera, CDH, HDP
I was interested to compare the different components distributed by Cloudera and HortonWorks. This also gives us an idea of the versions packaged by the two distributions. At the time of this writtingā¦
By David WORMS
Sep 22, 2013
Splitting HDFS files into multiple hive tables
Categories: Data Engineering | Tags: Flume, Pig, HDFS, Hive, Oozie, SQL
I am going to show how to split a CSV file stored inside HDFS as multiple Hive tables based on the content of each record. The context is simple. We are using Flume to collect logs from all over ourā¦
By David WORMS
Sep 15, 2013
About the new BSD license and its difference with other BSD licenses
Categories: Data Governance | Tags: License, Open source
As a non restrictive Open Source license, the ānew BSD licenseā is a commonly used license across the Node.js community. However, this is only one of the BSD license available along the original āBSDā¦
By David WORMS
Aug 8, 2013
Kerberos and delegation tokens security with WebHDFS
Categories: Cyber Security | Tags: HTTP, HDFS, Big Data, Kerberos
WebHDFS is an HTTP Rest server bundle with the latest version of Hadoop. What interests me on this article is to dig into security with the Kerberos and delegation tokens functionalities. I will coverā¦
By David WORMS
Jul 25, 2013
Testing the Oracle SQL Connector for Hadoop HDFS
Categories: Data Engineering | Tags: Database, File system, Oracle, HDFS, CDH, SQL
Using Oracle SQL Connector for HDFS, you can use Oracle Database to access and analyze data residing in HDFS files or a Hive table. You can also query and join data in HDFS or a Hive table with otherā¦
By David WORMS
Jul 15, 2013
Maven 3 behind a proxy
Categories: Hack | Tags: Maven, Java, Proxy
Maven 3 isnāt so different to itās previous version 2. You will migrate most of your project quite easily between the two versions. That wasnāt the case a fews years ago between versions 1 andā¦
By David WORMS
Jul 11, 2013
Node CSV version 0.2.7
Categories: Hack | Tags: Pipeline, CoffeeScript, CSV, Node.js
While Iām release version 0.2.7 of the CSV parser for Node.js, I stop here to drop a few lines of what has made into this release. We are now using the latest CoffeeScript, which is version 1.4.ā¦
By David WORMS
Jul 9, 2013
State of the Hadoop open-source ecosystem in early 2013
Categories: Big Data | Tags: Flume, Mesos, Phoenix, Pig, Hadoop, Kafka, Mahout, Data Science
Hadoop is already a large ecosystem and my guess is that 2013 will be the year where it grows even larger. There are some pieces that we no longer need to present. ZooKeeper, hbase, Hive, Pig, Flumeā¦
By David WORMS
Jul 8, 2013
Oracle and Hive, how data are published?
Categories: Big Data | Tags: Oracle, Hive, Sqoop, Data Lake
In the past few days, Iāve published 3 related articles: a first one covering the option to integrate Oracle and Hadoop, a second one explaining how to install and use the Oracle SQL Connector withā¦
By David WORMS
Jul 6, 2013
Oracle to Apache Hive with the Oracle SQL Connector
Categories: Business Intelligence | Tags: Oracle, HDFS, Hive, Network
In a previous article published last week, I introduced the choices available to connect Oracle and Hadoop. In a follow up article, I covered the Oracle SQL Connector, its installation and integrationā¦
By David WORMS
May 27, 2013
Options to connect and integrate Hadoop with Oracle
Categories: Data Engineering | Tags: Database, Java, Oracle, R, RDBMS, Avro, HDFS, Hive, MapReduce, Sqoop, NoSQL, SQL
I will list the different tools and libraries available to us developers in order to integrate Oracle and Hadoop. The Oracle SQL Connector for HDFS described below is covered in a follow up articleā¦
By David WORMS
May 15, 2013
The state of Hadoop distributions
Categories: Big Data | Tags: Hortonworks, Intel, Oracle, Hadoop, Cloudera
Apache Hadoop is of course made available for download on its official webpage. However, downloading and installing the several components that make a Hadoop cluster is not an easy task and is aā¦
By David WORMS
May 11, 2013
Apache Hive Essentials How-to by Darren Lee
Categories: Business Intelligence, Learning | Tags: UDF, Hadoop, Hive, File Format, SQL
Recently, Iāve been ask to review a new book on Apache Hive called āApache Hive Essentials How-toā (edit: the second edition is now available) written by Darren Lee and published by Packt Publishingā¦
By David WORMS
Apr 23, 2013
Hadoop development cluster of virtual machines with static IP using VirtualBox
Categories: Infrastructure | Tags: Ambari, Hortonworks, Red Hat, VirtualBox, VM, VMware, Cloudera, Network
A few days ago, I explained how to set up a cluster of virtual machine with static IPsand Internet access suitable to host your Hadoop cluster locally for development. At the time I made use of VMWareā¦
By David WORMS
Mar 14, 2013
Definitions of machine learning algorithms present in Apache Mahout
Categories: Data Science | Tags: Algorithm, Š”lassification, Hadoop, Mahout, Clustering, Machine Learning
Apache Mahout is a machine learning library built for scalability. Its core algorithms for clustering, classfication and batch based collaborative filtering are implemented on top of Apache Hadoopā¦
By David WORMS
Mar 8, 2013
Virtual machines with static IP for your Hadoop development cluster
Categories: Infrastructure | Tags: Ambari, Hortonworks, Red Hat, VirtualBox, VM, VMware, Cloudera, Network
While I am about to install and test Ambari, this article is the occasion to illustrate how I set up my development environment with multiple virtual machines. Ambari, the deployment and monitoringā¦
By David WORMS
Feb 27, 2013
Merging multiple files in Hadoop
Categories: Hack | Tags: File system, Hadoop, HDFS
This is a command I used to concatenate the files stored in Hadoop HDFS matching a globing expression into a single file. It uses the āgetmergeā utility of but contrary to āgetmergeā, the finalā¦
By David WORMS
Jan 12, 2013
E-commerce electronic cigarettes: first impressions with Prestashop
Categories: Tech Radar | Tags: HTML, Java, Node.js
Last year, I had to select and integrate an e-commerce software for the website CigarHit selling electronic cigarettes. Considering that the last e-commerce integration I made dated from 2005, I tookā¦
By David WORMS
Jul 25, 2012
Node CSV version 0.2.1
Categories: Node.js | Tags: CoffeeScript, CSV, Release and features, Streaming
After the announcement of the version 0.2.0 of the Node.js CSV parser at the beginning of october, we are releasing today a new version 0.2.1. This is mostly a bug fix release with enhancedā¦
By David WORMS
Jul 24, 2012
Node CSV version 0.1 and future developments
Categories: Node.js | Tags: CoffeeScript, CSV, Markdown, Release and features, Streaming
The Node CSV parser has just reach version 0.1 which close the 0.0.x releases. Started almost 2 years ago, the project has received a tremendous amount of participation in the form of bug reportsā¦
By David WORMS
Jul 21, 2012
Convert .flac music files to .mp3 on osx
Categories: Hack | Tags: OS X, File Format
As an osx user for years now, one should know by then that iTunes doesnāt support the flac format. We are now in 2012, Iāve been waiting for this to happen since years know. Loosing patience, darkā¦
By David WORMS
Jul 20, 2012
Hadoop and R with RHadoop
Categories: Business Intelligence, Data Science | Tags: Thrift, Learning and tutorial, R, Hadoop, HBase, HDFS, MapReduce, Data Analytics
RHadoop is a bridge between R, a language and environment to statistically explore data sets, and Hadoop, a framework that allows for the distributed processing of large data sets across clusters ofā¦
By David WORMS
Jul 19, 2012
Asynchronous array iteration in Node.js with Each
Categories: Node.js | Tags: Asynchronous, CoffeeScript, JavaScript, Release and features
Control flow in Node.js is the sort of library for which almost all the developers have created and publish their own libraries. They usually aim at reducing spaghetti codes made of deep callbacks. Iā¦
By David WORMS
Jul 18, 2012
Installing and using MADlib with PostgreSQL on OSX
Categories: Data Science | Tags: Database, Greenplum, Statistics, PostgreSQL, SQL
We cover basic installation and usage of PostgreSQL and MADlib on OSX and Ubuntu. Instructions for other environments should be similar. PostgreSQL is an Open Source database with enterpriseā¦
By David WORMS
Jul 7, 2012
Node CSV version 0.2 with streaming API
Categories: Node.js | Tags: Data Engineering, CSV, Markdown, Node.js, Streaming
The Node CSV parser in its version 0.2 has just been released. This version is a major enhancement as it aligned the parser with the best Node.js practice in respect of streams. The CSV parser behaveā¦
By David WORMS
Jul 2, 2012
HDFS and Hive storage - comparing file formats and compression methods
Categories: Big Data | Tags: Business intelligence, Hive, ORC, Parquet, File Format
A few days ago, we have conducted a test in order to compare various Hive file formats and compression methods. Among those file formats, some are native to HDFS and apply to all Hadoop users. Theā¦
By David WORMS
Mar 13, 2012
Two Hive UDAF to convert an aggregation to a map
Categories: Data Engineering | Tags: Java, HBase, Hive, File Format
I am publishing two new Hive UDAF to help with maps in Apache Hive. The source code is available on GitHub in two Java classes: āUDAFToMapā and āUDAFToOrderedMapā or you can download the jar file. Theā¦
By David WORMS
Mar 6, 2012
Java versus JS fun, a quote from the Node.js mailing list
Categories: Node.js | Tags: Java, JavaScript, Node.js
I just read that one on the mailing list. I found it relevant enough to share it with those who did not subscribe to it: First Lothar Pfeiler: I still wonder, if itās cool to have such a bigā¦
By David WORMS
Feb 23, 2012
A fresh look at testing Node.js projects: Mocha, Should and Travis
Categories: DevOps & SRE, Node.js | Tags: DevOps, Mocha, CI/CD, JavaScript, Node.js, Unit tests
Today, I finally decided to spend some time around Travis. Itās been a few weeks since that little green image on top of many GitHub homepages has been buzzing me. Well, to be totally honest, this isnā¦
By David WORMS
Feb 19, 2012
Coffee script, how do I debug that damn js line?
Categories: Hack, Node.js | Tags: Debug, CoffeeScript, JavaScript, Node.js
Update April 12th, 2012: Pull request adding error reporting to CoffeeScript with line mapping Chances are that, if you code in CoffeeScript, you often find yourself facing a JavaScript exceptionā¦
By David WORMS
Feb 15, 2012
Announcing Mecano, a set of functions for system deployment
Categories: DevOps & SRE, Node.js | Tags: Automation, Infrastructure, CoffeeScript, JavaScript, Open source
Update July 2016, Mecano is now renamed Nikita. We are releasing Node Mecano on GitHub which gather common functions used while deploying systems. The idea was to group those functions into aā¦
By David WORMS
Feb 12, 2012
OS module on steroids with the SIGAR Node binding
Categories: Node.js | Tags: C++, CPU, File system, Metrics, Monitoring, Network
Today we are announcing the first release of the Node binding to the SIGAR library. Visit the project website or the source code repository on GitHub. SIGAR is a cross platform interface for gatheringā¦
By David WORMS
Jan 11, 2012
Timeseries storage in Hadoop and Hive
Categories: Data Engineering | Tags: CRM, timeseries, Tuning, Hadoop, HDFS, Hive, File Format
In the next few weeks, we will be exploring the storage and analytic of a large generated dataset. This dataset is composed of CRM tables associated to one timeserie table of about 7,000 billiard rowsā¦
By David WORMS
Jan 10, 2012
How Node CSV parser may save your weekend
Categories: Hack | Tags: Bash, Hack, CSV, Node.js
Last Friday, an hour before the doors of my customer close for the weekend, a co-worker came to me. He just finished to export 9 CSV files from an Oracle database which he wanted to import intoā¦
By David WORMS
Dec 13, 2011
Node.js is now integrated to the Microsoft Azure platform
Categories: Cloud Computing, Tech Radar | Tags: Linux, Azure, Cloud, Node.js
Node is now a first class citizen in the Microsoft Azure cloud environment alongside .Net, Java and PHP. This integration is the logical consequence of Microsoftās involvement in the development ofā¦
By David WORMS
Dec 11, 2011
Hadoop and HBase installation on OSX in pseudo-distributed mode
Categories: Big Data, Learning | Tags: Hue, Infrastructure, Hadoop, HBase, Big Data, Deployment
The operating system chosen is OSX but the procedure is not so different for any Unix environment because most of the software is downloaded from the Internet, uncompressed and set manually. Only aā¦
By David WORMS
Dec 1, 2010
Storage and massive processing with Hadoop
Categories: Big Data | Tags: Hadoop, HDFS, Storage
Apache Hadoop is a system for building shared storage and processing infrastructures for large volumes of data (multiple terabytes or petabytes). Hadoop clusters are used by a wide range of projectsā¦
By David WORMS
Nov 26, 2010
Node HBase, a NodeJs client for Apache HBase
Categories: Big Data, Node.js | Tags: HBase, Big Data, Node.js, REST
HBase is a ācolumn famillyā database from the Hadoop ecosystem built on the model of Google BigTable. HBase can accommodate very large volumes of data (tera or peta) while maintaining highā¦
By David WORMS
Nov 1, 2010
MapReduce introduction
Categories: Big Data | Tags: Java, MapReduce, Big Data, JavaScript
Information systems have more and more data to store and process. Companies like Google, Facebook, Twitter and many others store astronomical amounts of information from their customers and must beā¦
By David WORMS
Jun 26, 2010
Node.js, JavaScript on the server side
Categories: Front End, Node.js | Tags: HTTP, Server, JavaScript, Node.js
Waiting for the Next Big Language (NBL for Next Big Language), this is now 3 years or more since I predict to my customers a bright future for JavaScript as a programming language for serverā¦
By David WORMS
Jun 12, 2010
