{"id":49431,"date":"2024-04-24T00:00:00","date_gmt":"2024-04-23T22:00:00","guid":{"rendered":"https:\/\/jotelulu.com\/blog\/disaster-recovery-que-signifient-rpo-rto-wrt-ou-mtd-et-pourquoi-sont-ils-importants\/"},"modified":"2024-04-24T00:00:00","modified_gmt":"2024-04-23T22:00:00","slug":"disaster-recovery-rpo-rto-wrt-mtd","status":"publish","type":"post","link":"https:\/\/jotelulu.com\/fr-fr\/blog\/disaster-recovery-rpo-rto-wrt-mtd\/","title":{"rendered":"Disaster Recovery : Que signifient RPO, RTO, WRT ou MTD et pourquoi sont-ils importants ?"},"content":{"rendered":"<p>Parlons de disaster recovery : <strong>Qu&rsquo;est-ce que le RPO, RTO, MTD ou WRT et pourquoi est-il important de comprendre ces concepts<\/strong> lorsque nous parlons de continuit&eacute; de l&rsquo;activit&eacute;, de continuit&eacute; des services et de r&eacute;cup&eacute;ration apr&egrave;s sinistre ?<\/p>\n<p>Parfois,<strong> parler de r&eacute;cup&eacute;ration apr&egrave;s sinistre (<em>Disaster Recovery<\/em>)<\/strong> ou d&rsquo;impacts sur le service ou sur l&rsquo;entreprise,&nbsp; peut sembler quelque peu effrayant. Nous partons vite dans les acronymes et les sigles qui semblent &ecirc;tre faits pour &eacute;garer les n&eacute;ophytes et les profanes.<\/p>\n<p>Dans cet article, nous visons &agrave; dissiper la confusion autour des concepts li&eacute;s au Disaster Recovery afin de vous aider &agrave; vous orienter correctement et &agrave; assurer la continuit&eacute; de l&rsquo;activit&eacute; de votre entreprise quoi qu&rsquo;il advienne.<\/p>\n<h2><strong>Disaster Recovery : Que signifient les RPO, RTO, WRT ou MTD et pourquoi sont-ils importants ?<\/strong><\/h2>\n<p>Imaginons &ecirc;tre dans une entreprise o&ugrave; tout fonctionne normalement, sans probl&egrave;mes majeurs. On pourrait voir un PC infect&eacute; par un virus causant de l&eacute;geres perturbations, un autre o&ugrave; l&rsquo;on remplace une souris d&eacute;faillante, ou encore une imprimante capricieuse jusqu&rsquo;au remplacement de sa cartouche. C&rsquo;est le quotidien habituel d&rsquo;une entreprise.<\/p>\n<p>Ceci serait ce que l&rsquo;on appelle <strong>le fonctionnement normal<\/strong>&nbsp;des syst&egrave;mes, dans lesquels<strong> il n&rsquo;y a pas d&rsquo;interruption de service<\/strong> ni mise en p&eacute;ril de la continuit&eacute; de l&rsquo;activit&eacute; de l&rsquo;entreprise.<\/p>\n<p>Nous serions &agrave; ce moment dans une situation comme celle ci-illustr&eacute;e ci-dessous :<\/p>\n<p><figure id=\"attachment_11088\" aria-describedby=\"caption-attachment-11088\" style=\"width: 768px\" class=\"wp-caption alignnone\"><img decoding=\"async\" data-recalc-dims=\"1\" loading=\"lazy\" class=\"size-full wp-image-11088\" src=\"https:\/\/i0.wp.com\/jotelulu.com\/fr-fr\/wp-content\/uploads\/sites\/4\/2024\/04\/Imagen.-Operacion-correcta-de-los-servicios.webp?resize=768%2C465&amp;ssl=1\" alt=\"\" width=\"768\" height=\"465\"><figcaption id=\"caption-attachment-11088\" class=\"wp-caption-text\"><em>Image. Fonctionnement correct des services<\/em><\/figcaption><\/figure>\n<\/p>\n<p>Apr&egrave;s une p&eacute;riode pendant laquelle le service fonctionne sans accroc, il y a une panne du service.<\/p>\n<p><figure id=\"attachment_11089\" aria-describedby=\"caption-attachment-11089\" style=\"width: 768px\" class=\"wp-caption alignnone\"><img decoding=\"async\" data-recalc-dims=\"1\" loading=\"lazy\" class=\"size-full wp-image-11089\" src=\"https:\/\/i0.wp.com\/jotelulu.com\/fr-fr\/wp-content\/uploads\/sites\/4\/2024\/04\/2-1.webp?resize=768%2C465&amp;ssl=1\" alt=\"\" width=\"768\" height=\"465\"><figcaption id=\"caption-attachment-11089\" class=\"wp-caption-text\"><em>Image. Une panne de service survient.<\/em><\/figcaption><\/figure>\n<\/p>\n<p>Lorsque cela se produit et qu&rsquo;un d&eacute;sastre survient, il est logique qu&rsquo;il soit n&eacute;cessaire de r&eacute;tablir le fonctionnement correct des syst&egrave;mes et l&rsquo;op&eacute;rationnel de l&rsquo;entreprise le plus t&ocirc;t possible.<\/p>\n<p>&Agrave; ce stade, on d&eacute;crit &eacute;galement souvent<strong> le RPO (Recovery Point Objective ou Objectif de Point de R&eacute;cup&eacute;ration)<\/strong> qui &eacute;tablit essentiellement <strong>la quantit&eacute; maximale de perte de donn&eacute;es ou de perte de service<\/strong> mesur&eacute;e dans le temps qui est <strong>acceptable<\/strong> pour notre entreprise.<\/p>\n<p>Cette valeur de RPO peut varier de mani&egrave;re drastique en fonction du service affect&eacute; et du type d&rsquo;entreprise que nous g&eacute;rons, ainsi que d&rsquo;autres param&egrave;tres tels que l&rsquo;heure &agrave; laquelle l&rsquo;impact se produit.<\/p>\n<p><figure id=\"attachment_11090\" aria-describedby=\"caption-attachment-11090\" style=\"width: 768px\" class=\"wp-caption alignnone\"><img decoding=\"async\" data-recalc-dims=\"1\" loading=\"lazy\" class=\"size-full wp-image-11090\" src=\"https:\/\/i0.wp.com\/jotelulu.com\/fr-fr\/wp-content\/uploads\/sites\/4\/2024\/04\/3-1.webp?resize=768%2C465&amp;ssl=1\" alt=\"\" width=\"768\" height=\"465\"><figcaption id=\"caption-attachment-11090\" class=\"wp-caption-text\"><em>Image. Introduction du RPO.<\/em><\/figcaption><\/figure>\n<\/p>\n<p>Lorsque nous &eacute;voquons le <strong>processus de r&eacute;cup&eacute;ration<\/strong>, il s&rsquo;agit de la p&eacute;riode allant de la <strong>d&eacute;tection<\/strong> de la panne du syst&egrave;me ou du service et du d&eacute;but de l&rsquo;intervention, jusqu&rsquo;&agrave; ce que le <strong>service soit &agrave; nouveau op&eacute;rationnel<\/strong>. Durant ce temps, le service n&rsquo;est pas encore r&eacute;tabli et ne peut donc pas &ecirc;tre consid&eacute;r&eacute; comme productif, c&rsquo;est-&agrave;-dire capable de fournir un service normal.<\/p>\n<p>Le <strong>RTO (Recovery Time Objective ou Objectif de Temps de R&eacute;cup&eacute;ration)<\/strong> d&eacute;finit l<strong>a dur&eacute;e maximale admissible<\/strong> pendant laquelle un service critique peut &ecirc;tre interrompu avant de reprendre normalement ses activit&eacute;s.<\/p>\n<p>Dans ce processus sont incluses les actions pour &eacute;tablir l&rsquo;architecture appropri&eacute;e, la mettre en fonction et r&eacute;cup&eacute;rer les donn&eacute;es n&eacute;cessaires pour son fonctionnement correct.<\/p>\n<p>Un exemple de ceci pourrait &ecirc;tre la panne du serveur h&eacute;bergeant la base de donn&eacute;es de notre ERP. Dans ce cas, il est n&eacute;cessaire de mettre en place un nouveau serveur, de d&eacute;ployer la base de donn&eacute;es et de r&eacute;cup&eacute;rer les donn&eacute;es avant de pouvoir restaurer le service en production.<\/p>\n<p><figure id=\"attachment_11091\" aria-describedby=\"caption-attachment-11091\" style=\"width: 768px\" class=\"wp-caption alignnone\"><img decoding=\"async\" data-recalc-dims=\"1\" loading=\"lazy\" class=\"size-full wp-image-11091\" src=\"https:\/\/i0.wp.com\/jotelulu.com\/fr-fr\/wp-content\/uploads\/sites\/4\/2024\/04\/4-1.webp?resize=768%2C465&amp;ssl=1\" alt=\"\" width=\"768\" height=\"465\"><figcaption id=\"caption-attachment-11091\" class=\"wp-caption-text\"><em>Image. Introduction du RTO.<\/em><\/figcaption><\/figure>\n<\/p>\n<p>Nous avons certes remis en marche le service, mais il n&rsquo;est pas encore en production et ne sert donc pas encore nos clients ou employ&eacute;s. Ainsi, le compteur tourne toujours &agrave; notre d&eacute;savantage et les pertes financi&egrave;res continuent.<\/p>\n<p>&Agrave; ce stade, nous prenons en compte le <strong>WRT (Work Recovery Time ou Temps de R&eacute;cup&eacute;ration du Travail)<\/strong>, qui est le <strong>temps n&eacute;cessaire pour r&eacute;tablir effectivement le service<\/strong>, en v&eacute;rifiant les syst&egrave;mes et en les remettant en ligne apr&egrave;s leur restauration durant la phase de RTO.<\/p>\n<p><figure id=\"attachment_11092\" aria-describedby=\"caption-attachment-11092\" style=\"width: 768px\" class=\"wp-caption alignnone\"><img decoding=\"async\" data-recalc-dims=\"1\" loading=\"lazy\" class=\"size-full wp-image-11092\" src=\"https:\/\/i0.wp.com\/jotelulu.com\/fr-fr\/wp-content\/uploads\/sites\/4\/2024\/04\/5-1.webp?resize=768%2C465&amp;ssl=1\" alt=\"\" width=\"768\" height=\"465\"><figcaption id=\"caption-attachment-11092\" class=\"wp-caption-text\"><em>Image. Introduction du WRT.<\/em><\/figcaption><\/figure>\n<\/p>\n<p>Dans ce cas, <strong>la somme du RTO et du WRT<\/strong> est ce que l&rsquo;on appelle le <strong>MTD (Maximum Tolerable Downtime ou Temps d&rsquo;Inactivit&eacute; Maximum Tol&eacute;rable)<\/strong>, qui d&eacute;crit<strong> la dur&eacute;e maximale pendant laquelle le service peut &ecirc;tre inop&eacute;rant<\/strong> avant que les cons&eacute;quences ne deviennent inacceptables pour l&rsquo;entreprise.<\/p>\n<p>Nous exposons ici, de mani&egrave;re simplifi&eacute;e, les principes de la reprise apr&egrave;s sinistre. Pour &eacute;laborer un plan de continuit&eacute; d&rsquo;affaires ou de r&eacute;cup&eacute;ration apr&egrave;s sinistre, il serait n&eacute;cessaire de calculer ces valeurs pour avoir une id&eacute;e pr&eacute;cise de la tol&eacute;rance de chaque service de notre organisation et de la fa&ccedil;on d&rsquo;optimiser nos processus pour &eacute;viter les probl&egrave;mes et garantir la p&eacute;rennit&eacute; de l&rsquo;entreprise<\/p>\n<h3><strong>Conclusion<\/strong><\/h3>\n<p>Nous esp&eacute;rons que cet article vous a aid&eacute; &agrave; comprendre ce que sont <strong>les RPO, RTO, MTD, et WRT, et pourquoi il est crucial<\/strong> de ma&icirc;triser ces concepts pour assurer la p&eacute;rennit&eacute; de votre entreprise.<\/p>\n<p>Nous vous invitons &agrave; poursuivre votre lecture avec d&rsquo;autres articles de cette s&eacute;rie disponibles sur <a href=\"https:\/\/jotelulu.com\/fr-fr\/blog\/\" target=\"_blank\" rel=\"noopener\">notre blog.<\/a><\/p>\n<p>Bonne lecture !<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Parlons de disaster recovery : Qu&rsquo;est-ce que le RPO, RTO, MTD ou WRT et pourquoi est-il important de comprendre ces concepts lorsque nous parlons de continuit&eacute; de l&rsquo;activit&eacute;, de continuit&eacute; des services et de r&eacute;cup&eacute;ration apr&egrave;s sinistre ? Parfois, parler de r&eacute;cup&eacute;ration apr&egrave;s sinistre (Disaster Recovery) ou d&rsquo;impacts sur le service ou sur l&rsquo;entreprise,&nbsp; peut [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":41016,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"class_list":["post-49431","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud-y-sistemas"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Disaster Recovery: Que signifient RPO, RTO, WRT ou MTD<\/title>\n<meta name=\"description\" content=\"Que signifient les RPO, RTO, MTD ou WRT et pourquoi il est important de comprendre ces concepts de la reprise apr\u00e8s sinistre\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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