{"id":731852,"date":"2023-10-18T11:27:37","date_gmt":"2023-10-18T09:27:37","guid":{"rendered":"https:\/\/www.capgemini.com\/fr-fr\/?p=731852"},"modified":"2025-03-04T06:56:09","modified_gmt":"2025-03-04T05:56:09","slug":"du-mainframe-au-cloud-un-chemin-de-mieux-en-mieux-balise","status":"publish","type":"post","link":"https:\/\/www.capgemini.com\/fr-fr\/perspectives\/blog\/du-mainframe-au-cloud-un-chemin-de-mieux-en-mieux-balise\/","title":{"rendered":"Du mainframe au cloud, un chemin de mieux en mieux balis\u00e9"},"content":{"rendered":"\n<header class=\"wp-block-cg-blocks-hero-blogs header-hero-blogs\"><div class=\"container\"><div class=\"hero-blogs\"><div class=\"hero-blogs-content-wrapper\"><div class=\"row\"><div class=\"col-12\"><div class=\"header-title\"><h1>Du mainframe au cloud, un chemin de mieux en mieux balis\u00e9<\/h1><\/div><\/div><\/div><\/div><div class=\"hero-blogs-bottom\"><div class=\"header-author\"><div class=\"author-img\"><img decoding=\"async\" src=\"\/wp-content\/themes\/capgemini2020\/assets\/images\/cg-logo.png?w=200&amp;quality=10\" alt=\"\" loading=\"lazy\"\/><\/div><div class=\"author-name-date\"><h5 class=\"author-name\">Lilian Chamontin, Florian Chantemesse &amp; Skander Guetari<\/h5><h5 class=\"blog-date\">Oct 18, 2023<\/h5><\/div><\/div><div class=\"brand-image\"> <\/div><\/div><\/div><\/div><\/header>\n\n\n\n<section class=\"wp-block-cg-blocks-intro-para undefined section section--intro\"><div class=\"intro-para\"><div class=\"container\"><div class=\"row\"><div class=\"col-12 col-md-1\"><nav class=\"article-social\"><ul class=\"social-nav\"><li class=\"ip-order-fb\"><a href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https:\/\/www.capgemini.com\/fr-fr\/perspectives\/blog\/du-mainframe-au-cloud-un-chemin-de-mieux-en-mieux-balise\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Ouvrir dans une nouvelle fen\u00eatre\"><i aria-hidden=\"true\" class=\"icon-fb\"><\/i><span class=\"sr-only\">Facebook<\/span><\/a><\/li><li class=\"ip-order-li\"><a href=\"https:\/\/www.linkedin.com\/sharing\/share-offsite\/?url=https:\/\/www.capgemini.com\/fr-fr\/perspectives\/blog\/du-mainframe-au-cloud-un-chemin-de-mieux-en-mieux-balise\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Ouvrir dans une nouvelle fen\u00eatre\"><i aria-hidden=\"true\" class=\"icon-li\"><\/i><span class=\"sr-only\">Linkedin<\/span><\/a><\/li><\/ul><\/nav><\/div><div class=\"col-12 col-md-11 col-lg-10\"><h2 class=\"intro-para-title\">Quantit\u00e9 d\u2019entreprises qui disposent encore d\u2019environnements mainframe souhaitent s\u2019en d\u00e9faire au profit de technologies cloud qui r\u00e9pondent \u00e0 la fois \u00e0 leurs enjeux techniques et m\u00e9tier. Gr\u00e2ce \u00e0 l\u2019apparition d\u2019outils et de m\u00e9thodologies adapt\u00e9s, cette bascule est de mieux en mieux ma\u00eetris\u00e9e<em>.<\/em><\/h2><\/div><\/div><\/div><\/div><\/section>\n\n\n\n<section class=\"wp-block-cg-blocks-group undefined section section--article-content\"><div class=\"article-main-content\"><div class=\"container\"><div class=\"row\"><div class=\"col-12 col-md-11 col-lg-10 offset-md-1 offset-lg-1\"><div class=\"article-text article-quote-text\">\n<p>Dans la finance, le secteur public ou certaines industries, les mainframes restent la plateforme de choix pour des processus \u00e0 haute intensit\u00e9. Bien souvent, ils supportent encore les syst\u00e8mes c\u0153ur de m\u00e9tier (ainsi que bon nombre d\u2019applications satellites\u202f!). Cette position cl\u00e9, les mainframes la doivent principalement \u00e0 leur ant\u00e9riorit\u00e9 ainsi qu\u2019\u00e0 leurs atouts en termes de performance, de s\u00e9curit\u00e9 et de r\u00e9silience.<\/p>\n\n\n\n<p>Ces grands syst\u00e8mes pr\u00e9sentent cependant des risques\u202fqui, h\u00e9las, vont grandissants, surtout au regard de l\u2019alternative en constants progr\u00e8s que constitue le cloud. Leurs co\u00fbts d\u2019exploitation gonflent inexorablement avec la n\u00e9cessaire augmentation des capacit\u00e9s et le co\u00fbt croissant des technologies elles-m\u00eames. Loin de l\u2019agilit\u00e9 et de la rapidit\u00e9 qu\u2019offre le cloud, leur rigidit\u00e9 et la complexit\u00e9 des processus de d\u00e9veloppement nuisent \u00e0 la comp\u00e9titivit\u00e9. La complexit\u00e9 de leurs architectures favorise aussi l\u2019immobilisme et d\u00e9courage l\u2019innovation. Enfin, par manque d\u2019attrait et de formations, l\u2019expertise technique dispara\u00eet peu \u00e0 peu.<\/p>\n\n\n\n<p>Entre les pr\u00e9cieux services qu\u2019ils rendent encore et les risques qu\u2019ils font peser, quitter les mainframes (ou m\u00eame r\u00e9duire leur empreinte) est souvent une d\u00e9cision d\u00e9licate qui engage toute l\u2019entreprise\u202f: faut-il privil\u00e9gier (et pour combien de temps\u202f?) ce statu quo efficace mais limitant les opportunit\u00e9s, ou bien se lancer dans ce qui sera \u00e0 la fois une modernisation du c\u0153ur de m\u00e9tier et une rationalisation technique\u202f?<\/p>\n\n\n\n<p>Dans ce cas, les b\u00e9n\u00e9fices attendus sont \u00e0 l\u2019exact oppos\u00e9 des risques de l\u2019immobilisme\u202f: moderniser un patrimoine ancien, dont la ma\u00eetrise et la documentation sont tr\u00e8s variables\u202f; g\u00e9rer la diminution progressive des experts (dev et ops)\u202f; rendre possibles des livraisons rapproch\u00e9es avec un haut niveau de tests\u202f; simplifier les interactions entre les applications pour pouvoir se focaliser sur celles qui cr\u00e9ent le plus de valeur et d\u2019opportunit\u00e9s pour les m\u00e9tiers.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-le-cloud-alternative-et-outil-de-la-modernisation-des-mainframes\">Le cloud, alternative et outil de la modernisation des mainframes<\/h2>\n\n\n\n<p>Pour moderniser son patrimoine mainframe, plusieurs strat\u00e9gies sont possibles\u202f: r\u00e9duire peu \u00e0 peu le p\u00e9rim\u00e8tre au gr\u00e9 des opportunit\u00e9s\u202f; optimiser la facturation li\u00e9e \u00e0 la consommation \u00e9nerg\u00e9tique et\/ou aux licences logicielles\u202f; am\u00e9liorer la comp\u00e9titivit\u00e9 via des refontes cibl\u00e9es des syst\u00e8mes associ\u00e9s aux nouveaux business models\u2026 En premier lieu, on identifiera donc la mieux adapt\u00e9e au contexte et aux enjeux de l\u2019entreprise (patrimoine technique, processus m\u00e9tier, d\u00e9lais, risques, co\u00fbts\u2026).&nbsp;<\/p>\n\n\n\n<p>Quelle que soit l\u2019approche retenue, le cloud offre une alternative solide aux environnements mainframes gr\u00e2ce \u00e0 ses nombreux atouts, d\u00e9sormais connus et reconnus :&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>sa flexibilit\u00e9, qui permet de monter\/couper rapidement des environnements\u202f;<\/li>\n\n\n\n<li>la <a href=\"https:\/\/www.capgemini.com\/fr-fr\/perspectives\/blog\/confiance-cloud-securite-cle\/\">s\u00e9curit\u00e9<\/a> \u00ab\u202fby design\u202f\u00bb des services manag\u00e9s et, de plus en plus, leur dimension souveraine, ce qui permet de retrouver les tr\u00e8s forts niveaux de s\u00e9curisation des mainframes\u202f;<\/li>\n\n\n\n<li>son passage \u00e0 l&#8217;\u00e9chelle, souvent d\u00e9terminante lors des bascules, qui peuvent n\u00e9cessiter d\u2019importants d\u00e9placements de donn\u00e9es et de lourds traitements sp\u00e9cifiques\u202f;<\/li>\n\n\n\n<li>le<a href=\"https:\/\/www.capgemini.com\/fr-fr\/perspectives\/blog\/controler-consommation-cloud-finops\/\"> Finops<\/a>, qui permet de ma\u00eetriser les co\u00fbts et d\u2019optimiser \u00e0 tout moment ses ressources (\u201cright-sizing\u201d, suppression des machines orphelines, adaptation des ressources au besoin\u2026)\u202f;&nbsp;<\/li>\n\n\n\n<li>une innovation permanente, qui permet de b\u00e9n\u00e9ficier r\u00e9guli\u00e8rement de nouveaux services\u202f;&nbsp;<\/li>\n\n\n\n<li>des solutions sectorielles sp\u00e9cifiques, permettant de r\u00e9pondre \u00e0 des enjeux r\u00e9glementaires par exemple.<\/li>\n<\/ul>\n\n\n\n<p>Pour simplifier et s\u00e9curiser la transformation, le cloud offre \u00e9galement des acc\u00e9l\u00e9rateurs, dont\u202f:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>des outils et des m\u00e9thodes pour industrialiser et automatiser les op\u00e9rations\u202f;<\/li>\n\n\n\n<li>des modules pour s\u00e9curiser les bascules gr\u00e2ce \u00e0 un monitoring des productions et une comparaison entre le socle mainframe et le socle cible\u202f;<\/li>\n\n\n\n<li>des technologies facilitant l\u2019interop\u00e9rabilit\u00e9 afin d\u2019externaliser et d\u2019\u00e9changer des donn\u00e9es entre les diff\u00e9rentes plateformes, jusqu\u2019\u00e0 des architectures orient\u00e9es \u00e9v\u00e9nements\u202f;<\/li>\n\n\n\n<li>des outillages pour moderniser l\u2019environnement de d\u00e9veloppement du socle mainframe et apporter de la flexibilit\u00e9 et de l\u2019agilit\u00e9 \u00e0 diff\u00e9rents niveaux.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Ne pas c\u00e9der aux craintes et aux id\u00e9es re\u00e7ues<\/h2>\n\n\n\n<p>La sortie du mainframe, surtout pour aller vers le cloud, suscite souvent des craintes, voire des doutes sur la cr\u00e9dibilit\u00e9 m\u00eame d\u2019une telle op\u00e9ration. Certes, certains projets sont parfois complexes et il a pu y avoir quelques \u00e9checs, mais les arguments des d\u00e9tracteurs de cette modernisation ne tiennent plus.<\/p>\n\n\n\n<p>La premi\u00e8re de ces id\u00e9es re\u00e7ues concerne la suppos\u00e9e complexit\u00e9 de maintenance d\u2019un code source transcod\u00e9 pour changer de plateforme d\u2019ex\u00e9cution. Rappelons tout d\u2019abord que ce type de transformation est avant tout tributaire de la source, dont il h\u00e9rite des points positifs comme n\u00e9gatifs. Cependant, la majorit\u00e9 des transformations, outill\u00e9es, pr\u00e9sente aujourd\u2019hui un niveau de maturit\u00e9 \u00e9lev\u00e9 qui permet d\u2019obtenir, c\u00f4t\u00e9 cible, un code propre. Enfin, suite au transcodage, on peut &nbsp;enclencher des transformations d\u2019urbanisation (financ\u00e9e par les \u00e9conomies r\u00e9alis\u00e9es), acc\u00e9l\u00e9r\u00e9e par le rapprochement technologique r\u00e9alis\u00e9.<\/p>\n\n\n\n<p>La performance est elle aussi souvent point\u00e9e du doigt mais, l\u00e0 encore, les choses sont \u00e0 nuancer. S\u2019il est vrai qu\u2019un mainframe, syst\u00e8me tr\u00e8s int\u00e9gr\u00e9, offre des temps de latence minimes lors des op\u00e9rations d\u2019entr\u00e9e-sortie et des requ\u00eates SQL, il n\u2019en est pas moins contraint par son architecture monolithique. Les applications qui s\u2019y ex\u00e9cutent sont en concurrence permanente pour les ressources CPU, qui se rar\u00e9fient lorsque la pression des utilisateurs augmente. \u00c0 l\u2019inverse, une architecture cloud est extensible, horizontalement comme verticalement, et on peut augmenter les capacit\u00e9s de mani\u00e8re cibl\u00e9e pour d\u00e9bloquer des \u00ab\u202fpoints de concentration\u202f\u00bb applicatifs. De plus, la parall\u00e9lisation des traitements, TP ou batch, permet de maintenir des temps de r\u00e9ponse optimaux et ouvre la porte aux syntaxes SQL complexes, rarement utilis\u00e9es sur les mainframes en raison de leur gourmandise en ressources. Certains traitements particuli\u00e8rement intensifs se trouvent m\u00eame acc\u00e9l\u00e9r\u00e9s une fois r\u00e9\u00e9crits et port\u00e9s dans le cloud. De fait, une r\u00e9\u00e9criture localis\u00e9e parvient \u00e0 d\u00e9bloquer la plupart des situations de moindre performance aux limites et constitue une tactique \u00e0 privil\u00e9gier lorsque la distribution des t\u00e2ches ne suffit plus. Au final, de nombreux clients ont \u00e9t\u00e9 surpris, et ravis, de voir leur nuit de batch s\u2019achever beaucoup plus t\u00f4t qu\u2019auparavant une fois la phase d\u2019optimisation cloud termin\u00e9e.<\/p>\n\n\n\n<p>Avec de surcro\u00eet les possibilit\u00e9s de mise \u00e0 l\u2019\u00e9chelle, l\u2019accroissement de la puissance unitaire des CPU, la s\u00e9curit\u00e9 by design et la r\u00e9silience globale des infrastructures du cloud, il n\u2019y a vraiment plus lieu de s\u2019opposer \u00e0 une telle transformation. Certains projets majeurs dont la presse a rendu compte, comme ceux d\u2019<a href=\"https:\/\/www.itforbusiness.fr\/ag-insurance-lache-sans-encombre-son-mainframe-65366\" target=\"_blank\" rel=\"noreferrer noopener\">AG Insurance<\/a>, <a href=\"https:\/\/www.computerweekly.com\/news\/252518168\/Santander-has-so-far-moved-80-of-IT-infrastructure-to-cloud\" target=\"_blank\" rel=\"noreferrer noopener\">Santander<\/a> et <a href=\"https:\/\/www.cio-online.com\/actualites\/lire-pourquoi-allianz-abandonne-le-mainframe-et-fonce-sur-linux-14947.html\" target=\"_blank\" rel=\"noreferrer noopener\">Allianz<\/a>, le prouvent\u202f: on peut sortir avec succ\u00e8s du mainframe.<\/p>\n\n\n\n<p>La faisabilit\u00e9 de l\u2019op\u00e9ration d\u00e9pend essentiellement du contexte qui en d\u00e9terminera les risques, les d\u00e9lais et les co\u00fbts. Concernant ces derniers, un projet \u00e0 port\u00e9e limit\u00e9e n\u00e9cessitera un budget de 2 \u00e0 5 millions d\u2019euros alors que pour les patrimoines les plus massifs, le cabinet Forrester estime que la facture a parfois pu d\u00e9passer les 100 millions de dollars. Ces budgets tiennent compte de la mise en place des nouvelles plateformes et des services cloud, de la n\u00e9cessaire \u00e9volution des comp\u00e9tences, de la r\u00e9architecture des applications et de l\u2019int\u00e9gration. S\u2019il faut toujours consid\u00e9rer ces sommes au regard du co\u00fbt croissant du statu quo, la question du ROI \u00e0 court et moyen terme se pose malgr\u00e9 tout.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment lancer sa transformation ?<\/h2>\n\n\n\n<p>La sortie du mainframe exige une vigilance particuli\u00e8re compte tenu de la criticit\u00e9 du patrimoine impact\u00e9 car il s\u2019agit souvent, on l\u2019a dit, d\u2019applications c\u0153ur de m\u00e9tier. La s\u00e9curisation doit donc \u00eatre le ma\u00eetre-mot de ces projets, dont la r\u00e9ussite repose sur quatre facteurs cl\u00e9s\u202f:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>l\u2019expertise technique, imp\u00e9rative pour traiter toutes les complexit\u00e9s de ce qui reste une transformation technologique structurante\u202f;<\/li>\n\n\n\n<li>le savoir-faire m\u00e9thodologique, capital pour veiller \u00e0 tous les aspects \u00e0 chacune des \u00e9tapes et embarquer d\u00e8s le d\u00e9part tous les acteurs impliqu\u00e9s\u202f;<\/li>\n\n\n\n<li>la ma\u00eetrise de l\u2019existant\u202f: simplifier le programme sans alt\u00e9rer son fonctionnement (par exemple, en laissant de c\u00f4t\u00e9 des modules devenus superflus) exige de tr\u00e8s bien conna\u00eetre le syst\u00e8me et les m\u00e9tiers qui l\u2019utilisent. Des acc\u00e9l\u00e9rateurs technologiques, comme des outils de cartographie des ressources utilis\u00e9es et des donn\u00e9es du mainframe, sont d\u2019une aide pr\u00e9cieuse\u202f;<\/li>\n\n\n\n<li>l\u2019industrialisation des op\u00e9rations de run\u202f: pour obtenir les niveaux de service attendus, il faudra pouvoir exploiter les nouveaux environnements en 24\u00d77 \u00e0 l\u2019aide des fonctionnalit\u00e9s cloud natives (services PaaS, orchestration de conteneurs, \u00e9quilibrage de charge\u2026).<\/li>\n<\/ul>\n\n\n\n<p>Pour d\u00e9marrer, notre recommandation est de commencer par bien choisir son approche strat\u00e9gique. Chacune pr\u00e9sente ses avantages propres, pour des b\u00e9n\u00e9fices plus ou moins importants en termes d\u2019agilit\u00e9, de r\u00e9duction de la dette technique, de comp\u00e9tences disponibles, de co\u00fbt et, bien s\u00fbr, de move-to-cloud. Pour se d\u00e9terminer, il faut tenir compte de plusieurs \u00e9l\u00e9ments, en particulier\u202f:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>l\u2019analyse du patrimoine existant (technologique, documentaire\u2026) pour valider les sc\u00e9narios techniques\u202f;<\/li>\n\n\n\n<li>la feuille de route move-to-cloud, si elle existe, pour d\u00e9finir des environnements cibles coh\u00e9rents\u202f;<\/li>\n\n\n\n<li>une formulation claire des enjeux m\u00e9tier, pour apporter la bonne r\u00e9ponse dans les bons d\u00e9lais\u202f;<\/li>\n\n\n\n<li>l\u2019identification des moyens et des d\u00e9lais acceptables afin de ma\u00eetriser le budget et le ROI\u202f;<\/li>\n\n\n\n<li>les trajectoires en cours de l\u2019entreprise (business, RH, technique, transformation\u2026) de mani\u00e8re \u00e0 s\u2019assurer de la disponibilit\u00e9 des ressources cl\u00e9s (humaines et applicatives).&nbsp;<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-pullquote\"><blockquote><p>Pour conclure, la migration des mainframes vers le cloud offre une multitude d&#8217;avantages convaincants qu&#8217;il ne faut pas n\u00e9gliger. Cette transition am\u00e9liore non seulement l&#8217;agilit\u00e9 et la scalabilit\u00e9, mais r\u00e9duit \u00e9galement les co\u00fbts op\u00e9rationnels et minimise les risques associ\u00e9s.<\/p><\/blockquote><\/figure>\n<\/div><\/div><\/div><\/div><\/div><\/section>\n\n\n\n<section class=\"wp-block-cg-blocks-wrapper-people-slider section section--expert-slider wrapper-people-slider undefined\"><div class=\"container\"><div class=\"content-title\"><h2 data-maxlength=\"34\" class=\"people-heading-title\">Auteurs<\/h2><\/div><\/div><div class=\"slider slider-boxed\"><div class=\"container\"><div class=\"slider-window\"><div class=\"slider-list\">\t\t<div class=\"slide\">\n\t\t\t<div class=\"box\">\n\t\t\t\t<div class=\"row\">\n\t\t\t\t\t<div class=\"col-md-6 col-lg-4 box-img-wrapper\">\n\t\t\t\t\t\t<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.capgemini.com\/fr-fr\/wp-content\/uploads\/sites\/6\/2023\/10\/Pic-Experts-L.Chamontin.jpg\" alt=\"Lilian Chamontin\"\/>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"col-md-6 col-lg-8 box-inner\">\n\t\t\t\t\t\t<div class=\"row title-social-media-header\">\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 mbl-social-icon\">\n\t\t\t\t\t\t\t\t<ul class=\"social-nav\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li><a aria-label=\"Linkedin\" target=\"_blank\" title=\"Ouvrir dans une nouvelle fen\u00eatre\" href=\"https:\/\/www.linkedin.com\/in\/lilianchamontin\/\"><i aria-hidden=\"true\" class=\"icon-li\"><\/i><\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 box-container\">\n\t\t\t\t\t\t\t\t<div class=\"box-title\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"people-profile-title\">Lilian Chamontin<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span>Chief Architect &amp; IT Modernization Expert for Financial Services<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 social-box-container dkt-social-icon\">\n\t\t\t\t\t\t\t\t<ul class=\"social-nav\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li><a aria-label=\"Linkedin\" target=\"_blank\" title=\"Ouvrir dans une nouvelle fen\u00eatre\" href=\"https:\/\/www.linkedin.com\/in\/lilianchamontin\/\"><i aria-hidden=\"true\" class=\"icon-li\"><\/i><\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"people-info\">Architecte d\u2019entreprise au sein des services financiers de Capgemini, Lilian apporte son leadership et ses 25 ann\u00e9es d\u2019exp\u00e9rience du d\u00e9veloppement Mainframe, des architectures middleware et applicatives et de la gestion de programmes complexes aux projets de modernisation IT. Sa fonction d\u2019Account Chief Architect aupr\u00e8s d\u2019une grande banque fran\u00e7aise le positionne en premi\u00e8re ligne des grandes probl\u00e9matiques IT dans leurs dimensions m\u00e9tier, innovative, technique et \u00e9conomique.<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\n\n\t\t<div class=\"slide\">\n\t\t\t<div class=\"box\">\n\t\t\t\t<div class=\"row\">\n\t\t\t\t\t<div class=\"col-md-6 col-lg-4 box-img-wrapper\">\n\t\t\t\t\t\t<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.capgemini.com\/fr-fr\/wp-content\/uploads\/sites\/6\/2023\/10\/Pic-Experts-F.Chantemesse.jpg\" alt=\"Florian Chantemesse\"\/>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"col-md-6 col-lg-8 box-inner\">\n\t\t\t\t\t\t<div class=\"row title-social-media-header\">\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 mbl-social-icon\">\n\t\t\t\t\t\t\t\t<ul class=\"social-nav\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li><a aria-label=\"Linkedin\" target=\"_blank\" title=\"Ouvrir dans une nouvelle fen\u00eatre\" href=\"https:\/\/www.linkedin.com\/in\/florian-chantemesse-9ab322214\/\"><i aria-hidden=\"true\" class=\"icon-li\"><\/i><\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 box-container\">\n\t\t\t\t\t\t\t\t<div class=\"box-title\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"people-profile-title\">Florian Chantemesse<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span>Head of Mainframe Modernisation for Financial Services France<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 social-box-container dkt-social-icon\">\n\t\t\t\t\t\t\t\t<ul class=\"social-nav\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li><a aria-label=\"Linkedin\" target=\"_blank\" title=\"Ouvrir dans une nouvelle fen\u00eatre\" href=\"https:\/\/www.linkedin.com\/in\/florian-chantemesse-9ab322214\/\"><i aria-hidden=\"true\" class=\"icon-li\"><\/i><\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"people-info\">Responsable de l&#8217;offre de Modernisation Mainframe dans l&#8217;entit\u00e9 des services financiers de Capgemini France. Il a fait ses premiers pas sur la voie de l&#8217;architecture, puis a pilot\u00e9 de nombreuses op\u00e9rations de transformations industrielles dans diff\u00e9rents domaines technologiques et contextes qui vont du Mainframe jusqu&#8217;au Cloud.<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\n\n\t\t<div class=\"slide\">\n\t\t\t<div class=\"box\">\n\t\t\t\t<div class=\"row\">\n\t\t\t\t\t<div class=\"col-md-6 col-lg-4 box-img-wrapper\">\n\t\t\t\t\t\t<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.capgemini.com\/fr-fr\/wp-content\/uploads\/sites\/6\/2022\/04\/Skander-Guetari-Photo-noir-blanc-1.png\" alt=\"Skander Guetari\"\/>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"col-md-6 col-lg-8 box-inner\">\n\t\t\t\t\t\t<div class=\"row title-social-media-header\">\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 mbl-social-icon\">\n\t\t\t\t\t\t\t\t<ul class=\"social-nav\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li><a aria-label=\"Linkedin\" target=\"_blank\" title=\"Ouvrir dans une nouvelle fen\u00eatre\" href=\"https:\/\/www.linkedin.com\/in\/skanderguetari\/?locale=fr_FR\"><i aria-hidden=\"true\" class=\"icon-li\"><\/i><\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 box-container\">\n\t\t\t\t\t\t\t\t<div class=\"box-title\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"people-profile-title\">Skander Guetari<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span>Expert en Infrastucture Transformation Services, Capgemini<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"col-md-12 col-lg-6 social-box-container dkt-social-icon\">\n\t\t\t\t\t\t\t\t<ul class=\"social-nav\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li><a aria-label=\"Linkedin\" target=\"_blank\" title=\"Ouvrir dans une nouvelle fen\u00eatre\" href=\"https:\/\/www.linkedin.com\/in\/skanderguetari\/?locale=fr_FR\"><i aria-hidden=\"true\" class=\"icon-li\"><\/i><\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"people-info\">Skander Guetari est docteur en Informatique de Paris 6.\nIl a travaill\u00e9 pendant 13 ans chez IBM en tant qu\u2019architecte sp\u00e9cialis\u00e9 dans le design de l\u2019infrastructure pour des projets e-business de plusieurs clients du CAC40. Il s\u2019est toujours int\u00e9ress\u00e9 aux nouvelles technologies qu\u2019il a syst\u00e9matiquement int\u00e9gr\u00e9es dans les solutions propos\u00e9es afin de faire b\u00e9n\u00e9ficier ses clients des nombreux avantages de l\u2019innovation.\nAujourd\u2019hui, ses missions s\u2019articulent autour des solutions d\u2019architectures Cloud, Devops et d\u2019Intelligence artificielle.<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div><\/div><\/div><div class=\"slider-nav\"><button class=\"slider-prev inactive\" aria-label=\"Slider-previous\" tabindex=\"-1\"><\/button><ul class=\"slider-paginator\"><\/ul><button class=\"slider-next\" aria-label=\"Slider-next\"><\/button><\/div><\/div><\/section>\n\n\n\t<section class=\"wp-block-cg-blocks-wrapper-learning-slider section learning-slider\">\n\t\t<div class=\"container\">\n\t\t\t<div class=\"learning-header\">\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\n\t<div class=\"slider slider-fader\">\n\t\t\t\t<div class=\"slider-list\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"slide active card-learning-slide right-card short-copy\" data-align-right=\"false\" data-long-copy=\"false\">\n\t\t\t\t\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t<div class=\"slide-bg-wrapper\">\n\n                                        \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n                                            \n                                            \n                                            \n                                            <img decoding=\"async\" loading=\"lazy\" class=\"slide-bg d-md-block\" src=\"https:\/\/www.capgemini.com\/fr-fr\/wp-content\/uploads\/sites\/6\/2023\/04\/Capgemini_Mountain_landscape.jpg\" alt=\"Banniere cloud-page chapo\" style=\"object-position: 50% 50%;object-fit: cover\" \/>\n                                        \n\n                  \t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"slide-reveal\"><\/div>\n\n\t\t\t\t\t\t\t\t\t\t<div class=\"container slide-info-wrapper card-learning-slider\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"col-12 col-lg-10 col-xl-6 col-xxl-6 right-card\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"slide-info short-copy\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"box\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"title-link\" href=\"https:\/\/www.capgemini.com\/fr-fr\/services\/cloud\/\" target=\"\" rel=\"noopener noreferrer\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"title-text\" data-maxlength=\"88\">Acc\u00e9l\u00e9rez votre transformation vers le cloud<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<p data-maxlength=\"330\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tTous les chemins m\u00e8nent au cloud, \u00e0 vous de choisir l\u2019itin\u00e9raire le plus adapt\u00e9 \u00e0 votre organisation. Nous vous accompagnons dans cette transition gr\u00e2ce \u00e0 une approche sur mesure, qui s\u2019appuie sur l\u2019automatisation, l\u2019analyse des donn\u00e9es, l\u2019intelligence artificielle et plus encore.\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"box-bottom\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"col-12 col-md-6\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"slide-info-footer\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"brand-logo-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"col-12 col-md-6\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"btnDiv\">\t<a class=\"more2\" aria-label=\"En savoir plus A propos Acc\u00e9l\u00e9rez votre transformation vers le cloud\" href=\"https:\/\/www.capgemini.com\/fr-fr\/services\/cloud\/\" target=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tEn savoir plus\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t         \t\t\t<\/div>\n\n\n\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"slider-nav-wrapper container\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"slider-nav-content col-12 col-lg-10 col-xl-6 col-xxl-6\" data-nav-content>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"slide-nav-container\">\n                                                                                                            <\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t<\/section>\n\n\t","protected":false},"excerpt":{"rendered":"<p>La migration des mainframes vers le cloud offre une multitude d&#8217;avantages convaincants qu&#8217;il ne faut pas n\u00e9gliger. Cette transition am\u00e9liore non seulement l&#8217;agilit\u00e9 et la scalabilit\u00e9, mais r\u00e9duit \u00e9galement les co\u00fbts op\u00e9rationnels et minimise les risques associ\u00e9.<\/p>\n","protected":false},"author":166,"featured_media":731920,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"cg_dt_proposed_to":[],"cg_seo_hreflang_relations":"[]","cg_seo_canonical_relation":"{\"uuid\":\"f52e718f-927a-4824-b76c-f7b52100ceda\",\"blogId\":\"\",\"domain\":\"\",\"sitePath\":\"\",\"postLink\":\"\",\"postId\":null,\"isSaved\":true,\"isCrossLink\":false,\"hasCrossLink\":false}","cg_seo_hreflang_x_default_relation":"{\"uuid\":\"86a14d6c-163c-40f2-8fd7-1c63d4786c1d\",\"blogId\":\"\",\"domain\":\"\",\"sitePath\":\"\",\"postLink\":\"\",\"postId\":null,\"isSaved\":true,\"isCrossLink\":false,\"hasCrossLink\":false}","cg_dt_approved_content":true,"cg_dt_mandatory_content":false,"cg_dt_notes":"","cg_dg_source_changed":false,"cg_dt_link_disabled":false,"_yoast_wpseo_primary_brand":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","featured_focal_points":""},"categories":[138],"tags":[188],"brand":[],"service":[35],"industry":[],"partners":[],"blog-topic":[350],"content-group":[],"class_list":["post-731852","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-transformation","tag-cloud","service-cloud","blog-topic-cloud"],"yoast_head":"<!-- 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