{"id":72585,"date":"2025-05-05T12:16:58","date_gmt":"2025-05-05T12:16:58","guid":{"rendered":"https:\/\/www.sardinasystems.com\/non-classifiee\/openstack-gere-pour-la-recherche-climatique-le-succes-avere-de-la-solution-cloud-fishos-pour-le-dkrz\/"},"modified":"2025-05-14T16:16:19","modified_gmt":"2025-05-14T16:16:19","slug":"managed-openstack-for-climate-research-dkrzs-proven-fishos-cloud-success-2","status":"publish","type":"post","link":"https:\/\/www.sardinasystems.com\/fr\/actualites\/managed-openstack-for-climate-research-dkrzs-proven-fishos-cloud-success-2\/","title":{"rendered":"OpenStack g\u00e9r\u00e9 pour la recherche climatique : le succ\u00e8s av\u00e9r\u00e9 de la solution cloud FishOS pour le DKRZ"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Lorsque votre mission consiste \u00e0 mod\u00e9liser le climat terrestre, vous avez besoin de plus que de la puissance de calcul \u2014 vous avez besoin d&rsquo;une fiabilit\u00e9 absolue. Cette \u00e9tude de cas examine comment le   <\/em><strong><em>Centre allemand de calcul climatique (DKRZ)<\/em><\/strong><em> a \u00e9volu\u00e9 de son environnement OpenStack existant vers une plateforme cloud puissante, \u00e9volutive et stable avec <\/em><strong><em>FishOS de Sardina Systems<\/em><\/strong><em>. <\/em> <\/p>\n\n<p class=\"wp-block-paragraph\"><em>Poursuivez votre lecture pour d\u00e9couvrir comment ce changement a transform\u00e9 les op\u00e9rations quotidiennes du client, a tripl\u00e9 sa capacit\u00e9 de calcul, et pourquoi OpenStack g\u00e9r\u00e9 s&rsquo;est av\u00e9r\u00e9 \u00eatre la solution id\u00e9ale pour leurs besoins de recherche en constante \u00e9volution.<\/em><\/p>\n\n<h4 class=\"wp-block-heading\"><strong>Du chaos \u00e0 la confiance climatique : pourquoi le DKRZ a opt\u00e9 pour un cloud OpenStack g\u00e9r\u00e9<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">La science du climat repose sur la coh\u00e9rence, la rapidit\u00e9 et l&rsquo;\u00e9chelle. Bas\u00e9 \u00e0 Hambourg, le <a href=\"https:\/\/www.dkrz.de\/en\/about-en\/about-us\" target=\"_blank\" rel=\"noopener\" title=\"\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">Centre allemand de calcul climatique (Deutsches Klimarechenzentrum, DKRZ)<\/mark><\/a> est au c\u0153ur de ces efforts depuis 1987, fournissant des ressources informatiques, du stockage de donn\u00e9es et des outils \u00e0 des milliers de chercheurs. Ces scientifiques analysent le changement climatique, pr\u00e9voient les mod\u00e8les m\u00e9t\u00e9orologiques et simulent les syst\u00e8mes complexes de la Terre.  <\/p>\n\n<p class=\"wp-block-paragraph\">Leur travail n\u00e9cessite de longues simulations, d&rsquo;\u00e9normes ensembles de donn\u00e9es et des r\u00e9sultats pr\u00e9cis, ce qui signifie que les d\u00e9faillances d&rsquo;infrastructure ne sont pas seulement g\u00eanantes ; elles sont potentiellement d\u00e9vastatrices. Toute instabilit\u00e9 peut retarder les projets, compromettre les r\u00e9sultats ou m\u00eame conduire \u00e0 la perte de donn\u00e9es \u2014 un risque inacceptable en science du climat. <\/p>\n\n<p class=\"wp-block-paragraph\">En 2021, l&rsquo;environnement OpenStack vieillissant du centre devenait trop fragile pour r\u00e9pondre aux besoins de la recherche moderne. Les probl\u00e8mes de performance et les corrections manuelles \u00e9puisaient le temps et l&rsquo;\u00e9nergie de l&rsquo;\u00e9quipe informatique. Parall\u00e8lement, le passage au cloud public hyperscale n&rsquo;\u00e9tait pas une option \u2014 tant les co\u00fbts que la taille de leurs donn\u00e9es le rendaient impraticable.  <br\/><\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1-1024x576.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1-1024x576.png\" alt=\"\" class=\"wp-image-72516\" srcset=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1-1024x576.png 1024w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1-300x169.png 300w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1-768x432.png 768w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1-1536x864.png 1536w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1-1390x782.png 1390w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Dirk-quote-1.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n<p class=\"wp-block-paragraph\">Le DKRZ a reconnu qu&rsquo;il \u00e9tait temps d&rsquo;aller au-del\u00e0 d&rsquo;un simple cloud fonctionnel. Ils avaient besoin d&rsquo;une plateforme sur mesure, pr\u00eate pour la recherche, capable d&rsquo;\u00e9voluer, de s&rsquo;adapter et de fournir des r\u00e9sultats de mani\u00e8re constante. C&rsquo;est alors qu&rsquo;ils ont d\u00e9cid\u00e9 de migrer vers Sardina Systems et de d\u00e9ployer <a href=\"https:\/\/www.sardinasystems.com\/fr\/fishos\/\" target=\"_blank\" rel=\"noopener\" title=\"\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">FishOS<\/mark><\/a> \u2014 une plateforme de gestion de cloud enti\u00e8rement automatis\u00e9e, bas\u00e9e sur OpenStack, connue pour son rapport co\u00fbt-efficacit\u00e9, sa flexibilit\u00e9 et son optimisation des performances.  <\/p>\n\n<h4 class=\"wp-block-heading\"><strong>Cloud priv\u00e9 aliment\u00e9 par FishOS pour le DKRZ<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">La migration des processus du DKRZ vers un environnement OpenStack g\u00e9r\u00e9 construit avec FishOS a \u00e9t\u00e9 simple \u2014 l&rsquo;\u00e9quipe a d\u00e9cid\u00e9 de d\u00e9ployer FishOS sur de nouveaux serveurs parall\u00e8lement au syst\u00e8me existant et a progressivement transf\u00e9r\u00e9 les charges de travail. Les machines virtuelles ont \u00e9t\u00e9 transf\u00e9r\u00e9es avec une perturbation minimale, et le temps d&rsquo;arr\u00eat a \u00e9t\u00e9 limit\u00e9 \u00e0 seulement un ou deux jours. <\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u00ab\u00a0La transition du DKRZ vers FishOS s&rsquo;est en effet d\u00e9roul\u00e9e sans heurts : ce fut un processus bien orchestr\u00e9 des deux c\u00f4t\u00e9s sans perturbations majeures. Un \u00e9l\u00e9ment cl\u00e9 ajout\u00e9 lors du d\u00e9ploiement \u00e9tait Trove, permettant des capacit\u00e9s de base de donn\u00e9es en tant que service pour soutenir les flux de travail de recherche.\u00a0\u00bb<\/p>\n<cite><em>Dmitry Krasovski, responsable technique chez Sardina Systems.<\/em><\/cite><\/blockquote>\n\n<h4 class=\"wp-block-heading\"><strong>\u00c9voluer de mani\u00e8re plus intelligente, pas seulement plus grande<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Les am\u00e9liorations de l&rsquo;infrastructure ne se sont pas arr\u00eat\u00e9es \u00e0 la stabilit\u00e9. Depuis le d\u00e9ploiement de FishOS, le DKRZ a plus que tripl\u00e9 sa capacit\u00e9 de calcul \u2014 passant de 268 \u00e0 928 c\u0153urs d&rsquo;ici 2025. Le passage des serveurs physiques aux machines virtuelles a permis une meilleure utilisation des ressources et une plus grande flexibilit\u00e9, en particulier pour des projets comme la <a href=\"https:\/\/esgf.llnl.gov\/\" target=\"_blank\" rel=\"noopener\" title=\"\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">F\u00e9d\u00e9ration du r\u00e9seau du syst\u00e8me terrestre (ESGF)<\/mark><\/a> qui exigeaient des architectures cloud natives et \u00e9volutives.  <\/p>\n\n<p class=\"wp-block-paragraph\">L&rsquo;ESGF est une f\u00e9d\u00e9ration de donn\u00e9es pair \u00e0 pair qui fournit un acc\u00e8s mondial aux sorties de mod\u00e8les climatiques et aux ensembles de donn\u00e9es d&rsquo;observation. Dans ce cadre, le DKRZ joue un double r\u00f4le de n\u0153ud de donn\u00e9es et de passerelle, contribuant \u00e0 assurer un partage et une analyse sans faille d&rsquo;ensembles de donn\u00e9es massifs entre institutions du monde entier. <\/p>\n\n<p class=\"wp-block-paragraph\">Le backend de stockage a \u00e9galement re\u00e7u une mise \u00e0 niveau majeure. Le cluster Ceph a \u00e9t\u00e9 transform\u00e9 en <strong>syst\u00e8me enti\u00e8rement flash<\/strong>, augmentant la capacit\u00e9 de <strong>140 To \u00e0 265 To<\/strong>. Ce changement a consid\u00e9rablement am\u00e9lior\u00e9 les performances pour les flux de travail \u00e0 haut d\u00e9bit et les simulations \u00e0 grande \u00e9chelle.  <\/p>\n\n<p class=\"wp-block-paragraph\">Pour maintenir le syst\u00e8me moderne et stable, le DKRZ suit un cycle de mise \u00e0 niveau r\u00e9gulier \u2014 environ une fois par an \u2014 garantissant ainsi aux chercheurs un acc\u00e8s permanent aux outils les plus r\u00e9cents sans risquer de perturber le syst\u00e8me.<\/p>\n\n<h4 class=\"wp-block-heading\"><strong>Un cloud en libre-service con\u00e7u pour les scientifiques<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Aujourd&rsquo;hui, le DKRZ exploite deux environnements de virtualisation : l&rsquo;un prenant en charge les services d&rsquo;infrastructure de base comme l&rsquo;authentification et le courrier \u00e9lectronique, et l&rsquo;autre \u2014 un cloud OpenStack aliment\u00e9 par FishOS \u2014 sp\u00e9cialement con\u00e7u pour les chercheurs.<\/p>\n\n<p class=\"wp-block-paragraph\">Cette configuration en libre-service s&rsquo;est av\u00e9r\u00e9e r\u00e9volutionnaire. Au lieu d&rsquo;attendre les administrateurs syst\u00e8me, les chercheurs peuvent maintenant lancer des instances de calcul, ex\u00e9cuter leurs simulations, analyser les r\u00e9sultats et partager leurs d\u00e9couvertes \u2014 tout cela selon leur propre calendrier. <\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote-1024x576.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote-1024x576.png\" alt=\"\" class=\"wp-image-72507\" srcset=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote-1024x576.png 1024w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote-300x169.png 300w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote-768x432.png 768w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote-1536x864.png 1536w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote-1390x782.png 1390w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/Carsten-quote.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n<p class=\"wp-block-paragraph\">Ce cloud d\u00e9centralis\u00e9 et flexible rapproche le DKRZ de la fa\u00e7on dont la recherche moderne fonctionne \u2014 agile, rapide et connect\u00e9e mondialement. Avec un stockage et un r\u00e9seau plus rapides, les chercheurs peuvent d\u00e9placer des donn\u00e9es entre \u00e9quipes et partenaires sans goulots d&rsquo;\u00e9tranglement.  <\/p>\n\n<p class=\"wp-block-paragraph\">En coulisses, FishOS veille \u00e0 ce que l&rsquo;environnement demeure rentable et r\u00e9actif. Lors des pics de charge de travail, le syst\u00e8me s&rsquo;\u00e9tend automatiquement \u00e0 des milliers de serveurs. Lorsque la demande diminue, il se r\u00e9duit, optimisant ainsi l&rsquo;utilisation des ressources tout en maintenant les performances.   <\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ-1024x576.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ-1024x576.png\" alt=\"\" class=\"wp-image-72525\" srcset=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ-1024x576.png 1024w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ-300x169.png 300w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ-768x432.png 768w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ-1536x864.png 1536w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ-1390x782.png 1390w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/KT-quote-DKRZ.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n<h4 class=\"wp-block-heading\"><strong>Int\u00e9gration avec le calcul haute performance<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Pour mod\u00e9liser et simuler le climat terrestre, le DKRZ s&rsquo;appuie sur des syst\u00e8mes de calcul haute performance (HPC) capables de g\u00e9rer les exigences computationnelles extr\u00eames de la mod\u00e9lisation \u00e0 haute r\u00e9solution, des simulations \u00e0 long terme et de l&rsquo;assimilation de donn\u00e9es en temps r\u00e9el.<\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-scaled.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-1024x576.png\" alt=\"\" class=\"wp-image-72489\" srcset=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-1024x576.png 1024w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-300x169.png 300w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-768x432.png 768w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-1536x864.png 1536w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-1390x782.png 1390w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/04\/table-DKRZ-1920x1080.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n<p class=\"wp-block-paragraph\">Bien que le cloud bas\u00e9 sur FishOS n&rsquo;ex\u00e9cute pas directement les charges de travail HPC du DKRZ, il les compl\u00e8te en g\u00e9rant le post-traitement et la livraison des donn\u00e9es autour de l&rsquo;environnement HPC. Les utilisateurs peuvent acc\u00e9der aux donn\u00e9es HPC depuis leurs machines virtuelles en utilisant des clients Lustre.  <\/p>\n\n<p class=\"wp-block-paragraph\">Cette configuration hybride garantit que chaque couche d&rsquo;infrastructure exploite ses points forts : le HPC pour les performances, et OpenStack pour l&rsquo;accessibilit\u00e9 et la rapidit\u00e9.<\/p>\n\n<h4 class=\"wp-block-heading\"><strong>Op\u00e9rations all\u00e9g\u00e9es, impact global<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">L&rsquo;un des aspects les plus impressionnants du d\u00e9ploiement du DKRZ est son efficacit\u00e9 op\u00e9rationnelle. L&rsquo;ensemble de l&rsquo;environnement OpenStack est g\u00e9r\u00e9 par seulement deux membres du personnel, avec le soutien de Sardina Systems. <\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u00ab Actuellement, nous avons quelques personnes qui g\u00e8rent activement notre cloud OpenStack. Cela n&rsquo;est possible que parce que Sardina Systems nous fournit le soutien et l&rsquo;expertise dont nous avons besoin. Pour une petite \u00e9quipe, c&rsquo;est un avantage \u00e9norme \u2014 cela nous fait \u00e9conomiser du temps et des ressources tout en maintenant le bon fonctionnement des syst\u00e8mes. \u00bb<\/p>\n<cite><em>Dirk Welsch, administrateur syst\u00e8me au DKRZ.<\/em><\/cite><\/blockquote>\n\n<p class=\"wp-block-paragraph\">Les mises \u00e0 niveau sont d\u00e9sormais pr\u00e9visibles et routini\u00e8res. En juillet 2025, l&rsquo;\u00e9quipe pr\u00e9voit de mettre \u00e0 jour vers la derni\u00e8re version d&rsquo;OpenStack Epoxy. Les nettoyages de configuration h\u00e9rit\u00e9s, comme la r\u00e9cente refonte des structures IP, ont r\u00e9duit les frictions et facilit\u00e9 les futures mises \u00e0 niveau.  <\/p>\n\n<p class=\"wp-block-paragraph\"><em>Le parcours cloud du DKRZ montre ce qui est possible lorsque la bonne technologie rencontre le bon partenaire. Avec FishOS, le centre a non seulement restaur\u00e9 la stabilit\u00e9, mais a \u00e9galement acquis la flexibilit\u00e9 et l&rsquo;\u00e9chelle n\u00e9cessaires pour soutenir la recherche de nouvelle g\u00e9n\u00e9ration. <\/em><\/p>\n\n<p class=\"wp-block-paragraph\"><em>Si vous cherchez \u00e0 moderniser votre infrastructure sans renoncer au contr\u00f4le ni faire exploser le budget, Sardina Systems est l\u00e0 pour vous aider. <a href=\"https:\/\/www.sardinasystems.com\/fr\/a-propos-de-nous\/contact\/\" target=\"_blank\" rel=\"noopener\" title=\"\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">Contactez-nous<\/mark><\/a> aujourd&rsquo;hui pour une consultation gratuite et d\u00e9couvrez comment un cloud OpenStack FishOS g\u00e9r\u00e9 peut soutenir les efforts de votre \u00e9quipe.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lorsque votre mission consiste \u00e0 mod\u00e9liser le climat terrestre, vous avez besoin de plus que de la puissance de calcul \u2014 vous avez besoin d&rsquo;une fiabilit\u00e9 absolue. Cette \u00e9tude de cas examine comment le Centre allemand de calcul climatique (DKRZ) a \u00e9volu\u00e9 de son environnement OpenStack existant vers une plateforme cloud puissante, \u00e9volutive et stable [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":72482,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1276,1277],"tags":[3263,3264,1278,1332,1618],"class_list":["post-72585","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-notre-blog","tag-climate-research-fr","tag-cloud-scaling-fr","tag-poissons","tag-cloud-openstack","tag-nuage-prive","grve-entry-item","grve-blog-item"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Egine Nalbandian\"\/>\n\t<meta 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