Category: Technical tips

Here you'll find some technical tips from my experience

Measuring Network Throughput using NetPerf & iPerf

Using NetPerf and iPerf for UDP throughput

The three key measures of network performance are latency (the time required to transfer data across the network), throughput (the amount of data or number of data packets that can be delivered on an IP network in a predefined timeframe) and jitter or delay jitter (the changes and their duration in delay that occur during …

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Adding CORS Headers Using Lambda@Edge and Amazon CloudFront

Cross-origin resource sharing (CORS) defines a way for client web applications that are loaded in one domain to interact with resources in a different domain, it allows to build rich client-side web applications and selectively allow cross-origin access to your resources. To see how to enable CORS on most web servers see If you’re …

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Elasticsearch and Kibana Search Speed Tuning

Elasticsearch - Logstash - Kibana

This blog post provides some tips for Elasticsearch and Kibana Search Speed Tuning, apart from those recommended by Elasticsearch official website [1]: giving enough memory to the filesystem cache using faster hardware searching as few fields as possible pre-indexing data avoiding scripts considering mapping identifiers as keywords etc. I recently installed the ELK Stack (Elasticsearch, …

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GIS Map in Elasticsearch with Kibana using Vega, Scripted Fields & Painless

Vega graph

Elasticsearch is a distributed open source, RESTful search engine built on top of Apache Lucene and released under an Apache license. Kibana is an open source data visualization plugin for Elasticsearch. Vega (and Vega-lite) allows to beyond the built-in visualizations offered by Kibana. In this short tutorial we will use Vega to create a GIS …

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How to create a CloudFront distribution with AWS SDK for Go

Amazon Web Services provides different SDKs, Toolkits and Command Line Tools to develop and manage application running on AWS. AWS SDK for Go is one of the latest tools provided. New versions are pushed almost every 5 days. In this blog post, we will write a simple Go code to create a CloudFront distribution with …

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6 things you should know about Amazon CloudSearch

Amazon CloudSearch is a fully-managed service in the AWS Cloud that makes it simple and cost-effective to set up, manage, and scale a custom search solution for your website or application. Amazon CloudSearch supports a rich set of features including language-specific text processing for 34 languages, free text search, faceted search, geospatial search, customizable relevance …

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Uploading a Large File to Amazon S3

The largest single file that can be uploaded into an Amazon S3 Bucket in a single PUT operation is 5 GB. If you want to upload large objects (> 5 GB), you will consider using multipart upload API, which allows to upload objects from 5 MB up to 5 TB. The Multipart Upload API is …

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Solution de portail Intranet : Intégration de Liferay et Alfresco sous Ubuntu Server avec MySQL

Liferay est une solution aboutie Open Source de gestion de contenu, orientée portail social et collaboratif (internet, extranet ou intranet) ; plusieurs grandes entreprises et administrations l’ont utilisé pour déployer leur portail internet. Lorsqu’il faut cependant mettre sur pied un portail intranet ou extranet, la fonctionnalité GED (gestion et archivage électronique de documents) est indispensable …

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Installation du PGI OpenERP 7.0 sur Debian Squeeze et CentOS 6.4

OpenERP est un PGI (Progiciel de Gestion Intégré) Open Source dont le développement a commencé il y a maintenant 14 ans par Fabien Pinckaers (pinky) pour les business de son père, et plus tard de son oncle. Développé avec Python et utilisant le SGBD libre PostGreSQL, le logiciel est aujourd’hui très abouti et plusieurs grandes …

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10 useful SQL queries to save time with WordPress

Le CMS (Content Management System) WordPress utilise le système de gestion de base de données MySQL dans 99,9% de cas, et occupe plus de 60% de part de marché des CMS devant Drupal (mon préféré…) et Joomla. Toutes les informations de WordPress (paramètres, billets, pages, commentaires, catégories, tags, etc.) sont stockées dans la base de …

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