{"id":8843,"date":"2021-11-25T11:58:53","date_gmt":"2021-11-25T10:58:53","guid":{"rendered":"https:\/\/blog.capdata.fr\/?p=8843"},"modified":"2021-11-25T15:01:11","modified_gmt":"2021-11-25T14:01:11","slug":"oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout","status":"publish","type":"post","link":"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/","title":{"rendered":"Oracle 19c High Availabality : une solution de haute disponibilit\u00e9 \u00e0 moindre co\u00fbt."},"content":{"rendered":"<a class=\"synved-social-button synved-social-button-share synved-social-size-24 synved-social-resolution-single synved-social-provider-twitter nolightbox\" data-provider=\"twitter\" target=\"_blank\" rel=\"nofollow\" title=\"Share on Twitter\" href=\"https:\/\/twitter.com\/intent\/tweet?url=https%3A%2F%2Fblog.capdata.fr%2Findex.php%2Fwp-json%2Fwp%2Fv2%2Fposts%2F8843&#038;text=Article%20sur%20le%20blog%20de%20la%20Capdata%20Tech%20Team%20%3A%20\" style=\"font-size: 0px;width:24px;height:24px;margin:0;margin-bottom:5px;margin-right:5px\"><img loading=\"lazy\" decoding=\"async\" alt=\"twitter\" title=\"Share on Twitter\" class=\"synved-share-image synved-social-image synved-social-image-share\" width=\"24\" height=\"24\" style=\"display: inline;width:24px;height:24px;margin: 0;padding: 0;border: none;box-shadow: none\" src=\"https:\/\/blog.capdata.fr\/wp-content\/plugins\/social-media-feather\/synved-social\/image\/social\/regular\/48x48\/twitter.png\" \/><\/a><a class=\"synved-social-button synved-social-button-share synved-social-size-24 synved-social-resolution-single synved-social-provider-linkedin nolightbox\" data-provider=\"linkedin\" target=\"_blank\" rel=\"nofollow\" title=\"Share on Linkedin\" href=\"https:\/\/www.linkedin.com\/shareArticle?mini=true&#038;url=https%3A%2F%2Fblog.capdata.fr%2Findex.php%2Fwp-json%2Fwp%2Fv2%2Fposts%2F8843&#038;title=Oracle%2019c%20High%20Availabality%20%3A%20une%20solution%20de%20haute%20disponibilit%C3%A9%20%C3%A0%20moindre%20co%C3%BBt.\" style=\"font-size: 0px;width:24px;height:24px;margin:0;margin-bottom:5px;margin-right:5px\"><img loading=\"lazy\" decoding=\"async\" alt=\"linkedin\" title=\"Share on Linkedin\" class=\"synved-share-image synved-social-image synved-social-image-share\" width=\"24\" height=\"24\" style=\"display: inline;width:24px;height:24px;margin: 0;padding: 0;border: none;box-shadow: none\" src=\"https:\/\/blog.capdata.fr\/wp-content\/plugins\/social-media-feather\/synved-social\/image\/social\/regular\/48x48\/linkedin.png\" \/><\/a><a class=\"synved-social-button synved-social-button-share synved-social-size-24 synved-social-resolution-single synved-social-provider-mail nolightbox\" data-provider=\"mail\" rel=\"nofollow\" title=\"Share by email\" href=\"mailto:?subject=Oracle%2019c%20High%20Availabality%20%3A%20une%20solution%20de%20haute%20disponibilit%C3%A9%20%C3%A0%20moindre%20co%C3%BBt.&#038;body=Article%20sur%20le%20blog%20de%20la%20Capdata%20Tech%20Team%20%3A%20:%20https%3A%2F%2Fblog.capdata.fr%2Findex.php%2Fwp-json%2Fwp%2Fv2%2Fposts%2F8843\" style=\"font-size: 0px;width:24px;height:24px;margin:0;margin-bottom:5px\"><img loading=\"lazy\" decoding=\"async\" alt=\"mail\" title=\"Share by email\" class=\"synved-share-image synved-social-image synved-social-image-share\" width=\"24\" height=\"24\" style=\"display: inline;width:24px;height:24px;margin: 0;padding: 0;border: none;box-shadow: none\" src=\"https:\/\/blog.capdata.fr\/wp-content\/plugins\/social-media-feather\/synved-social\/image\/social\/regular\/48x48\/mail.png\" \/><\/a><p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-8844\" src=\"https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/19c.png\" alt=\"\" width=\"225\" height=\"225\" srcset=\"https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/19c.png 225w, https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/19c-150x150.png 150w, https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/19c-144x144.png 144w, https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/19c-50x50.png 50w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Hello<\/p>\n<p>voici un petit article rapide sur la haute disponibilit\u00e9 Oracle 19c.<br \/>\nComme nous le savons d\u00e9j\u00e0, la solution Real Application Cluster (RAC) pour une architecture Oracle n&#8217;est plus disponible depuis la version 19c standard Edition SE2.<br \/>\nEt comme de nombreux clients d\u00e9tiennent ce type de licences bien moins couteuses que &#8220;Enterprise Edition&#8221;, cela pose un r\u00e9el souci en terme de haute disponibilit\u00e9.<\/p>\n<p>Nous avions pr\u00e9sent\u00e9 il y&#8217;a quelques mois, la solution &#8220;<a href=\"https:\/\/blog.capdata.fr\/index.php\/gerer-votre-disaster-recovery-oracle-avec-dbvisit-standby\/\">DBVisit standby<\/a>&#8220;. le &#8220;dataguard&#8221; propos\u00e9 par un \u00e9diteur tiers pour la version Standard Edition.<\/p>\n<p>Mais cette solution ne prend pas en charge la couche &#8220;Grid infrastructure&#8221;.<\/p>\n<p>&nbsp;<\/p>\n<h2>Oracle\u00a0 19c High availabality<\/h2>\n<p>&nbsp;<\/p>\n<p>Oracle propose, depuis le version Oracle Database <strong>19.7<\/strong> la fonctionnalit\u00e9 &#8220;Oracle 19c High Availabality&#8221;. Cette solution permet de profiter des fonctionnalit\u00e9s de la couche &#8220;Grid infrastructure&#8221; (ASM, ACFS&#8230;) avec une version Standard Edition 2, mais cela, au d\u00e9triment de certaines restrictions.<\/p>\n<p>Cette architecture est disponible aussi bien sous Linux que pour Solaris ou Windows.<\/p>\n<p>&nbsp;<\/p>\n<h3>Principes<\/h3>\n<p>l&#8217;objectif est de garantir au client une haute disponibilit\u00e9 dans un budget bien moins on\u00e9reux que de migrer vers une version &#8220;Enterprise Edition&#8221;.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-8845\" src=\"https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/oracle-19c-se2-ha-300x225.png\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/oracle-19c-se2-ha-300x225.png 300w, https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/oracle-19c-se2-ha-768x576.png 768w, https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/oracle-19c-se2-ha.png 960w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>En effet, lorsqu&#8217;un client souhaite passer d&#8217;une version Oracle 12cR2 RAC Standard Edition 2, par exemple, vers la version 19c, il n&#8217;a pas d&#8217;autres choix que :<\/p>\n<ul>\n<li>migrer vers une version Oracle 19c Enterprise Edition pour b\u00e9n\u00e9ficier de l&#8217;option RAC.<\/li>\n<li>convertir son instance vers une Oracle Standalone et perdre les fonctionnalit\u00e9s &#8220;Grid Infrastructure&#8221;<\/li>\n<\/ul>\n<p>Une autre solution, mais alors bien plus contraignante pour un bon nombre de clients, est de passer vers une version &#8220;<a href=\"https:\/\/www.oracle.com\/fr\/autonomous-database\/\">autonomous database<\/a>&#8221; sur le Cloud Oracle.<\/p>\n<p>C&#8217;est dans ce contexte que Oracle a r\u00e9fl\u00e9chi a une 4e solution avec la fonctionnalit\u00e9 &#8220;Oracle 19c High Availabality&#8221;.<\/p>\n<p>&nbsp;<\/p>\n<h3>Les avantages<\/h3>\n<p>&nbsp;<\/p>\n<p>Cette fonctionnalit\u00e9 comporte un certain nombres d&#8217;avantages<\/p>\n<ul>\n<li>prise en charge de la Grid infrastructure : Clusterware, disques ASM, ACFS, HAVIP et MGMTDB<\/li>\n<li>mode actif\/passif, un bascule d&#8217;instance est possible en cas de panne sur l&#8217;instance active et permet de continuer l&#8217;activit\u00e9 sur l&#8217;instance passive.<\/li>\n<li>Pas de surco\u00fbt en terme de licence, si et seulement si, le d\u00e9marrage de l&#8217;instance passive n&#8217;exc\u00e8de pas 10 jours.<\/li>\n<li>Les agents pour Oracle Grid Infrastructure Clusterware peuvent fonctionner pour le monitoring de Oracle 19c High Availabality.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Les inconv\u00e9nients<\/h3>\n<p>&nbsp;<\/p>\n<p>Comme cette fonctionnalit\u00e9 s&#8217;adapte pour des licences SE2 sans surco\u00fbt d&#8217;utilisation, nous avons clairement des limites \u00e0 l&#8217;utilisation.<\/p>\n<ul>\n<li>Lorsque nous effectuons un &#8220;failover&#8221; sur l&#8217;instance passive, son utilisation est limit\u00e9e \u00e0 10 jours continus.<\/li>\n<li>Seuls 2 n\u0153uds, l&#8217;un actif, l&#8217;autre passif, sont permis.<\/li>\n<li>De plus, cette solution est loin d&#8217;\u00eatre aussi robuste qu&#8217;un RAC classique pour les raisons suivantes :\n<ul>\n<li>il n&#8217;y a pas de relocalisation automatique des ressources RAC, un DBA doit intervenir manuellement pour d\u00e9marrer la passive lors d&#8217;un crash du n\u0153ud actif.<\/li>\n<li>une relocalisation de service en ligne n&#8217;est pas possible (on pense \u00e0 un <em>srvctl relocate service -d<\/em>&#8230;), il faut arr\u00eater l&#8217;instance active afin d&#8217;intervenir.<\/li>\n<li>pour appliquer les patchs DB et CRS, le mode &#8220;rolling upgrade&#8221; n&#8217;est pas possible.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Conclusion<\/h2>\n<p>&nbsp;<\/p>\n<p>Cette solution est loin de valider la robustesse d&#8217;un Real Application Cluster, puisque toute intervention requiert une action manuelle et surtout les 2 instances ne sont pas UP au m\u00eame moment comme pour un RAC.<\/p>\n<p>Cependant, elle a le m\u00e9rite de permettre \u00e0 son utilisateur de profiter de l&#8217;infrastructure Grid avec disques ASM, ACFS et Clusterware et ce avec une licence Oracle Standard Edition et sans surco\u00fbt.<br \/>\nDe plus, ce mode de fonctionnement actif\/passif avec l&#8217;infrastructure Clusterware, garantit un failover d&#8217;instance rapide.<\/p>\n<p>En revanche, le SPOF (single point of failure) restera toujours, dans une architecture Oracle RAC, le stockage sur nos disques ASM locaux ou sur un SAN.<br \/>\nLa mise en place d&#8217;un RAID avec controler associ\u00e9 assureront la haute disponibilit\u00e9 de ce cot\u00e9.<\/p>\n<p>&nbsp;<\/p>\n<p>\ud83d\ude42<\/p>\n<p>&nbsp;<\/p>\n<p>Emmanuel RAMI<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<a class=\"synved-social-button synved-social-button-share synved-social-size-24 synved-social-resolution-single synved-social-provider-twitter nolightbox\" data-provider=\"twitter\" target=\"_blank\" rel=\"nofollow\" title=\"Share on Twitter\" href=\"https:\/\/twitter.com\/intent\/tweet?url=https%3A%2F%2Fblog.capdata.fr%2Findex.php%2Fwp-json%2Fwp%2Fv2%2Fposts%2F8843&#038;text=Article%20sur%20le%20blog%20de%20la%20Capdata%20Tech%20Team%20%3A%20\" style=\"font-size: 0px;width:24px;height:24px;margin:0;margin-bottom:5px;margin-right:5px\"><img loading=\"lazy\" decoding=\"async\" alt=\"twitter\" title=\"Share on Twitter\" class=\"synved-share-image synved-social-image synved-social-image-share\" width=\"24\" height=\"24\" style=\"display: inline;width:24px;height:24px;margin: 0;padding: 0;border: none;box-shadow: none\" 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Comme nous le savons d\u00e9j\u00e0, la solution Real Application Cluster (RAC) pour une architecture Oracle n&#8217;est plus disponible depuis la version 19c standard Edition SE2. Et comme&hellip; <a href=\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/\" class=\"more-link\">Continuer la lecture <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":32,"featured_media":8849,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-8843","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oracle"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Oracle 19c High Availabality : une solution de haute disponibilit\u00e9 \u00e0 moindre co\u00fbt. - Capdata TECH BLOG<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oracle 19c High Availabality : une solution de haute disponibilit\u00e9 \u00e0 moindre co\u00fbt. - Capdata TECH BLOG\" \/>\n<meta property=\"og:description\" content=\"&nbsp; Hello voici un petit article rapide sur la haute disponibilit\u00e9 Oracle 19c. 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Et comme&hellip; Continuer la lecture &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/\" \/>\n<meta property=\"og:site_name\" content=\"Capdata TECH BLOG\" \/>\n<meta property=\"article:published_time\" content=\"2021-11-25T10:58:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-11-25T14:01:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/36498518-vert-24-7-365-avec-horloge-et-fleche-icone-ou-l-etiquette-isole-sur-fond-blanc.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1300\" \/>\n\t<meta property=\"og:image:height\" content=\"1300\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Emmanuel RAMI\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Emmanuel RAMI\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/\"},\"author\":{\"name\":\"Emmanuel RAMI\",\"@id\":\"https:\/\/blog.capdata.fr\/#\/schema\/person\/797b9b6698fa35f7ce3e9a70a8b102ae\"},\"headline\":\"Oracle 19c High Availabality : une solution de haute disponibilit\u00e9 \u00e0 moindre co\u00fbt.\",\"datePublished\":\"2021-11-25T10:58:53+00:00\",\"dateModified\":\"2021-11-25T14:01:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/\"},\"wordCount\":656,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/blog.capdata.fr\/#organization\"},\"articleSection\":[\"Oracle\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/\",\"url\":\"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/\",\"name\":\"Oracle 19c High Availabality : une solution de haute disponibilit\u00e9 \u00e0 moindre co\u00fbt. - 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Comme nous le savons d\u00e9j\u00e0, la solution Real Application Cluster (RAC) pour une architecture Oracle n&#8217;est plus disponible depuis la version 19c standard Edition SE2. Et comme&hellip; Continuer la lecture &rarr;","og_url":"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/","og_site_name":"Capdata TECH BLOG","article_published_time":"2021-11-25T10:58:53+00:00","article_modified_time":"2021-11-25T14:01:11+00:00","og_image":[{"width":1300,"height":1300,"url":"https:\/\/blog.capdata.fr\/wp-content\/uploads\/2021\/11\/36498518-vert-24-7-365-avec-horloge-et-fleche-icone-ou-l-etiquette-isole-sur-fond-blanc.jpg","type":"image\/jpeg"}],"author":"Emmanuel RAMI","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Emmanuel RAMI","Dur\u00e9e de lecture estim\u00e9e":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/#article","isPartOf":{"@id":"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/"},"author":{"name":"Emmanuel RAMI","@id":"https:\/\/blog.capdata.fr\/#\/schema\/person\/797b9b6698fa35f7ce3e9a70a8b102ae"},"headline":"Oracle 19c High Availabality : une solution de haute disponibilit\u00e9 \u00e0 moindre co\u00fbt.","datePublished":"2021-11-25T10:58:53+00:00","dateModified":"2021-11-25T14:01:11+00:00","mainEntityOfPage":{"@id":"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/"},"wordCount":656,"commentCount":0,"publisher":{"@id":"https:\/\/blog.capdata.fr\/#organization"},"articleSection":["Oracle"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/","url":"https:\/\/blog.capdata.fr\/index.php\/oracle-19c-high-availabality-une-solution-de-haute-disponibilite-a-moindre-cout\/","name":"Oracle 19c High Availabality : une solution de haute disponibilit\u00e9 \u00e0 moindre co\u00fbt. - 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