{"id":36787,"date":"2022-12-06T10:11:31","date_gmt":"2022-12-06T10:11:31","guid":{"rendered":"https:\/\/www.railscarma.com\/?p=36787"},"modified":"2022-12-08T10:59:30","modified_gmt":"2022-12-08T10:59:30","slug":"guide-du-developpeur-pour-la-mise-a-lechelle-dune-application-ruby-on-rails","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/fr\/blog\/guide-du-developpeur-pour-la-mise-a-lechelle-dune-application-ruby-on-rails\/","title":{"rendered":"Guide du d\u00e9veloppeur pour la mise \u00e0 l'\u00e9chelle d'une application Ruby on Rails"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"36787\" class=\"elementor elementor-36787\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a410ed0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a410ed0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-52ef25d\" data-id=\"52ef25d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ca94750 elementor-widget elementor-widget-text-editor\" data-id=\"ca94750\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Pour les cr\u00e9ateurs de l'application, le fait d'avoir autant d'utilisateurs est \u00e0 la fois un succ\u00e8s et un d\u00e9fi. La premi\u00e8re chose \u00e0 faire est de g\u00e9rer l'int\u00e9r\u00eat croissant pour votre produit ou service. \u00c0 l'inverse, une pr\u00e9paration technique insuffisante peut conduire \u00e0 l'effondrement de l'application. Il est heureusement possible de r\u00e9soudre ce probl\u00e8me. Vous apprendrez comment faire \u00e9voluer votre application Ruby on Rails avec notre aide.<\/span><\/p>\n<h2><b>Quelle est l'\u00e9volutivit\u00e9 du cadre ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">La mise \u00e0 l'\u00e9chelle d'un framework consiste \u00e0 augmenter la capacit\u00e9 de l'application \u00e0 g\u00e9n\u00e9rer davantage de requ\u00eates par minute (RPM). Il est moins important de s'occuper du cadre lui-m\u00eame que de l'infrastructure de l'ensemble du syst\u00e8me de serveurs. Voyez comment cela fonctionne dans la pratique.<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-weight: 400;\">Prenons l'exemple d'un gratte-ciel dot\u00e9 d'un seul ascenseur pouvant accueillir quelques personnes. Il y a tellement de monde dans l'ascenseur qu'il ne peut pas fonctionner correctement en raison de l'int\u00e9r\u00eat \u00e9lev\u00e9 pour le paysage. Avant que le b\u00e2timent ne soit achev\u00e9, il est essentiel de s'assurer que l'infrastructure appropri\u00e9e est en place ou de d\u00e9velopper une m\u00e9thode pour transporter plus de personnes au sommet. L'ascenseur d\u00e9crit ici \u00e9quivaut \u00e0 une application sans la mise \u00e0 l'\u00e9chelle appropri\u00e9e. Il en r\u00e9sulte des pertes qui peuvent \u00eatre extr\u00eamement douloureuses.<\/span><\/p>\n<p><\/p>\n<h2><b>Que se passera-t-il si vous ne faites pas \u00e9voluer votre application ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Lorsque les applications ne s'adaptent pas \u00e0 l'augmentation du trafic, elles peuvent devenir lentes et m\u00eame tomber en panne. Ce n'est que le d\u00e9but des probl\u00e8mes possibles. Les clients risquent de partir si la solution tarde \u00e0 venir, et leur m\u00e9contentement se refl\u00e9tera dans les commentaires en ligne. La mise \u00e0 l'\u00e9chelle doit \u00eatre am\u00e9lior\u00e9e rapidement, et non minimis\u00e9e.<\/span><\/p>\n<h2><b>Quels sont les obstacles auxquels vous pourriez \u00eatre confront\u00e9 lors de l'extension de votre application ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">S'il est facile de s'initier \u00e0 la mise \u00e0 l'\u00e9chelle, il est difficile de la mettre en \u0153uvre. L'architecture de l'application peut \u00eatre l'un des obstacles. Il peut y avoir des probl\u00e8mes avec le traitement des demandes, par exemple, si les solutions qui se trouvent dans une r\u00e9alit\u00e9 de grand int\u00e9r\u00eat n'ont pas \u00e9t\u00e9 mises en \u0153uvre. Un code propre et modulaire est recommand\u00e9 pour <a href=\"https:\/\/www.railscarma.com\/fr\/developpement-dapplications-de-rails-personnalises\/\">Applications de la RdR<\/a>.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&nbsp;Cette approche favorise l'int\u00e9gration avec un plus grand nombre de syst\u00e8mes de gestion de bases de donn\u00e9es. En outre, il n'est pas difficile de placer des \u00e9quilibreurs de charge pour traiter davantage de demandes.<\/span><\/p>\n<p><\/p>\n<h2><b>Ruby on Rails est-il \u00e9volutif ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Par cons\u00e9quent, les applications Ruby peuvent \u00eatre facilement mises \u00e0 l'\u00e9chelle. Il y a deux raisons \u00e0 cela : les capacit\u00e9s de mise \u00e0 l'\u00e9chelle horizontale du langage et sa nature \"thread-safe\". En fait, il suffit de lancer plus de processus Ruby et de connecter plus de serveurs \u00e0 votre application pour g\u00e9rer plus de trafic.&nbsp;<\/span><\/p>\n<p><\/p>\n<h2><b>Conseils pour faire \u00e9voluer votre application Ruby on Rails<\/b><\/h2>\n<p><\/p>\n<p><span style=\"font-weight: 400;\">Si certaines d'entre elles sont sp\u00e9cifiques \u00e0 Ruby on Rails, d'autres peuvent \u00eatre appliqu\u00e9es \u00e0 n'importe quel serveur d'application sans partage.<\/span><\/p>\n<ul>\n<li aria-level=\"1\"><b>La premi\u00e8re r\u00e8gle consiste \u00e0 mettre en cache, mettre en cache, mettre en cache et encore mettre en cache.<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les donn\u00e9es peuvent \u00eatre mises en cache sur le client et transmises au navigateur \u00e0 l'aide de biblioth\u00e8ques Ajax telles que JQuery. Apprenez \u00e0 utiliser l'expiration et les balises, et \u00e0 mettre en cache les r\u00e9ponses HTTP \u00e0 l'aide des caches de passerelle \/ proxy inverse. Tirez parti de la mise en cache int\u00e9gr\u00e9e de Rails pour les actions, les pages et les fragments. Les r\u00e9sultats de votre base de donn\u00e9es peuvent \u00eatre mis en cache en utilisant Memcache au lieu de les extraire.<\/span><\/p>\n<p><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>S\u00e9parer les donn\u00e9es de celles qui les servent<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Ne mettez pas toutes vos donn\u00e9es dans une seule base de donn\u00e9es \"par commodit\u00e9\". Des bases de donn\u00e9es distinctes doivent \u00eatre utilis\u00e9es pour les ensembles de donn\u00e9es ind\u00e9pendants. Mettez les ressources statiques \u00e0 disposition par le biais d'un niveau distinct ou utilisez Amazon S3 ou Akamai pour les diffuser. Le co\u00fbt est plus \u00e9lev\u00e9, mais la mise \u00e0 l'\u00e9chelle est plus facile. Discutez avec votre DBA pour savoir si un mod\u00e8le de donn\u00e9es relationnel est n\u00e9cessaire pour tous vos magasins de donn\u00e9es, car les bases de donn\u00e9es relationnelles s'adaptent \u00e0 la hausse et non \u00e0 la baisse. Si vos donn\u00e9es sont plus simples, vous pouvez peut-\u00eatre utiliser un magasin de donn\u00e9es cl\u00e9-valeur. Pour stocker et analyser de grandes quantit\u00e9s de donn\u00e9es non structur\u00e9es, utilisez Hadoop car il existe des clients Ruby. Si vous utilisez un syst\u00e8me de fichiers, vous devez \u00e9galement \u00eatre conscient de ses limites en termes d'\u00e9volutivit\u00e9. Utilisez une copie de votre base de donn\u00e9es principale au lieu de votre base de donn\u00e9es de production si vous avez des besoins importants en mati\u00e8re de reporting de donn\u00e9es.<\/span><\/p>\n<p><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Minimiser et g\u00e9rer les d\u00e9pendances externes<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Assurez-vous que le site ne d\u00e9pend pas de services externes tels que les r\u00e9seaux publicitaires ou les flux RSS. Veillez \u00e0 disposer d'un plan de secours au cas o\u00f9 un service ne r\u00e9pondrait pas ou ne pourrait pas g\u00e9rer le volume croissant de demandes.<\/span><\/p>\n<p><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Maintenez vos gestionnaires de t\u00e2ches et votre base de donn\u00e9es \u00e0 jour<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les requ\u00eates SQL g\u00e9n\u00e9r\u00e9es par n'importe quel ORM, y compris ActiveRecord de Rails, peuvent causer des probl\u00e8mes de performance de la base de donn\u00e9es. Si vous avez r\u00e9alis\u00e9 une int\u00e9gration majeure, assurez-vous de v\u00e9rifier votre journal des requ\u00eates lentes pour vous assurer qu'il n'y a pas d'index de base de donn\u00e9es \"manquants\" et que votre code Rails ne contient pas de find-all inappropri\u00e9s. Vous devriez v\u00e9rifier p\u00e9riodiquement votre base de donn\u00e9es pour voir si des index ne sont plus n\u00e9cessaires. Surveillez \u00e9galement l'utilisation des ressources de vos t\u00e2ches planifi\u00e9es et de vos t\u00e2ches d'arri\u00e8re-plan.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&nbsp;Il n'est pas rare que les t\u00e2ches se chevauchent au fur et \u00e0 mesure que votre base d'utilisateurs augmente, et le traitement quotidien des journaux peut commencer \u00e0 prendre plus de 24 heures ! Il est facile d'\u00eatre pris au d\u00e9pourvu par ce genre de choses. Veillez \u00e0 ce que vos t\u00e2ches soient s\u00e9par\u00e9es en plusieurs niveaux. \u00c0 terme, vous souhaiterez peut-\u00eatre passer \u00e0 un gestionnaire de t\u00e2ches bas\u00e9 sur les messages au fur et \u00e0 mesure que votre entreprise se d\u00e9veloppera.<\/span><\/p>\n<p><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Vos donn\u00e9es relationnelles in\u00e9vitables doivent \u00eatre partag\u00e9es (sharded)<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les bases de donn\u00e9es MySQL doivent \u00eatre partag\u00e9es \u00e0 des niveaux d'\u00e9chelle \u00e9lev\u00e9s. Le processus de partage consiste \u00e0 diviser votre ensemble de donn\u00e9es en morceaux ind\u00e9pendants sur la base d'une cl\u00e9. Le sharding bas\u00e9 sur l'ID de l'utilisateur peut \u00eatre utilis\u00e9 pour la plupart des sites Rails orient\u00e9s vers le consommateur, mais il existe \u00e9galement des sch\u00e9mas de sharding bas\u00e9s sur l'\u00e2ge des donn\u00e9es ou la fr\u00e9quence d'acc\u00e8s.<\/span><\/p>\n<p><\/p>\n<h2><b>Conclusion<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Selon le type de projet, les applications bas\u00e9es sur Ruby on Rails doivent \u00eatre dimensionn\u00e9es diff\u00e9remment. Comme beaucoup d'autres technologies, RoR n'est pas la r\u00e9ponse \u00e0 tous les probl\u00e8mes. Il est donc important de comparer le profil de votre entreprise avec les capacit\u00e9s de Rails avant de d\u00e9velopper une application. Nous recommandons de travailler avec <\/span><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.railscarma.com\/fr\/\">Soci\u00e9t\u00e9 de d\u00e9veloppement Ruby on Rails<\/a> <\/span><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.railscarma.com\/fr\/\">Railscarma<\/a> si vous avez besoin d'un expert <a href=\"https:\/\/www.railscarma.com\/fr\/soutien-et-maintenance-des-applications\/\">Soutien aux RdR<\/a>. Chaque \u00e9tape de la <a href=\"https:\/\/www.railscarma.com\/fr\/developpement-dapplications-mobiles\/\">d\u00e9veloppement d'applications<\/a> sera prise en charge par notre \u00e9quipe de professionnels exp\u00e9riment\u00e9s.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t  <div class=\"related-post slider\">\r\n        <div class=\"headline\">Articles Similaires<\/div>\r\n    <div class=\"post-list owl-carousel\">\r\n\r\n            <div class=\"item\">\r\n            <div class=\"thumb post_thumb\">\r\n    <a  title=\"Qu&#039;est-ce que Offliberty Ruby Gem et comment fonctionne-t-il ?\" href=\"https:\/\/www.railscarma.com\/fr\/blog\/quest-ce-que-offliberty-ruby-gem-et-comment-fonctionne-t-il\/?related_post_from=41304\">\r\n\r\n      <img decoding=\"async\" width=\"800\" height=\"300\" 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The first thing you need to do is deal with the growing interest in your product or service. Conversely, insufficient technical preparation can lead to the collapse of the application. 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