{"id":1237,"date":"2012-01-30T09:39:46","date_gmt":"2012-01-30T08:39:46","guid":{"rendered":"http:\/\/www.solucominsight.fr\/?p=1237"},"modified":"2015-01-21T09:58:59","modified_gmt":"2015-01-21T08:58:59","slug":"quest-ce-que-le-big-data","status":"publish","type":"post","link":"https:\/\/www.riskinsight-wavestone.com\/en\/2012\/01\/quest-ce-que-le-big-data\/","title":{"rendered":"Qu\u2019est-ce que le Big Data ?"},"content":{"rendered":"<p><em>[Article r\u00e9dig\u00e9 en collaboration avec \u00a0Mathieu Millet]<\/em><\/p>\n<p><strong>LGA <\/strong>(Lise Gasnier)<strong> :<\/strong> C\u2019est le big buzz de 2011 qui ne manquera pas de faire du bruit cette ann\u00e9e encore! Il d\u00e9signe les ensembles de donn\u00e9es aux volum\u00e9trie et complexit\u00e9 telles qu\u2019il faut repenser les moyens de leur gestion. Le volume de ces donn\u00e9es se mesure d\u00e9sormais en p\u00e9taoctets (10<sup>15<\/sup> octets). Et, par complexit\u00e9, nous entendons une ou plusieurs caract\u00e9ristiques parmi lesquelles :<\/p>\n<ul>\n<li>croissance rapide et soutenue,<\/li>\n<li>formats h\u00e9t\u00e9rog\u00e8nes,<\/li>\n<li>peu ou pas de structuration (comme par exemple pour les images, vid\u00e9os, pages web et emails),<\/li>\n<li>des sources vari\u00e9es.<\/li>\n<\/ul>\n<p>Les Big data sont par exemple des :<\/p>\n<ul>\n<li>donn\u00e9es transactionnelles (commandes, paiements etc.).<\/li>\n<li>logs,<\/li>\n<li>clickstreams,<\/li>\n<li>\u00e9v\u00e9nements g\u00e9olocalis\u00e9s,<\/li>\n<li>contenus de r\u00e9seaux sociaux,<\/li>\n<li>donn\u00e9es comportementales,<\/li>\n<li>relev\u00e9s de compteurs intelligents,<\/li>\n<li>appels au service client.<\/li>\n<\/ul>\n<p>Par extension, le terme d\u00e9signe, au-del\u00e0 des donn\u00e9es, les moyens humains ou technologiques extraordinaires mis en \u0153uvre pour les traiter.<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>MMI <\/strong>(Mathieu Millet)<strong>\u00a0: <\/strong>L\u2019ensemble de la cha\u00eene de traitement technique de ces donn\u00e9es se voit remani\u00e9e : capture, stockage, analyse et transformation en informations pertinentes et enfin, restitution.<\/p>\n<p>Processus m\u00e9tiers et finalit\u00e9 des traitements n\u2019ont rien de nouveau (pilotage op\u00e9rationnel, aide \u00e0 la d\u00e9cision, analyse client\u00e8le et comportementale, optimisation de processus\u2026). Par contre, le volume, la nature et le rythme d\u2019acquisition en donn\u00e9es, d\u00e9crit par Lise, tout comme la volont\u00e9 d\u2019acc\u00e9l\u00e9rer ces traitements provoquent un vrai changement de paradigmes technologiques et organisationnels.<\/p>\n<p>Ainsi, certaines pratiques ne sont plus envisageables comme la recopie int\u00e9grale de donn\u00e9es entre diff\u00e9rentes applications susceptibles d\u2019utiliser ces donn\u00e9es. \u00c9galement, de nouvelles pratiques sont \u00e0 employer afin de tirer parti de l\u2019\u00e9cosyst\u00e8me Big Data ; par exemple : mettre en \u0153uvre une plus grande coop\u00e9ration\/interaction entre les solutions d\u2019analyse et l\u2019<em>entrep\u00f4t de stockage<\/em> afin de b\u00e9n\u00e9ficier des performances (I\/O mais \u00e9galement CPU) de ce dernier.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>LGA : <\/strong>La probl\u00e9matique de gestion des gros volumes de donn\u00e9es ne date pas d\u2019hier. Depuis bient\u00f4t dix ans, elle est m\u00eame centrale aux m\u00e9tiers de la recherche scientifique, de la finance et de l\u2019indexation web. Mais, la conjoncture actuelle en a fait un sujet de tout premier plan :<\/p>\n<ul>\n<li>La production de donn\u00e9es augmente drastiquement, par l\u2019action des individus tout autant que celles des organisations. Ainsi, les analystes d\u2019IDC rel\u00e8vent que le volume du contenu num\u00e9rique mondial a atteint 2.7 zettaoctets (soit 2.7*10<sup>21<\/sup> octets), avec une augmentation de 48% en 2011. Ils estiment par ailleurs, qu\u2019en 2012, 90% de l\u2019information sera sans structure (voir le rapport complet gratuitement \u00e0 cet endroit : <a href=\"http:\/\/www.idc.com\/getdoc.jsp?containerId=231720\">http:\/\/www.idc.com\/getdoc.jsp?containerId=231720)<\/a>.<\/li>\n<li>Des solutions techniques ont \u00e9merg\u00e9, dont certaines libres, comme la plus embl\u00e9matique : Hadoop et son \u00e9cosyst\u00e8me (que nous \u00e9voquerons plus en d\u00e9tail dans un prochain article). Elles rendent possible et accessible la refonte technologique n\u00e9cessaire, \u00e9voqu\u00e9e par Mathieu.<\/li>\n<\/ul>\n<p>Les entreprises r\u00e9fl\u00e9chissent donc aujourd\u2019hui, tous secteurs confondus, \u00e0 tirer un avantage concurrentiel de leurs gisements de donn\u00e9es ou de ceux publics (web, open data). Des premiers \u201cbusiness cases\u201d (optimisation du marketing num\u00e9rique, d\u00e9tection et pr\u00e9vention des fraudes, analyse des r\u00e9seaux sociaux et des relations&#8230;) d\u00e9montrent d\u00e9j\u00e0 que de nouveaux indicateurs, de nouveaux leviers de \u00a0valeurs \u00a0sont \u00e0 port\u00e9e de main. Mais, les questions demeurent nombreuses : il faut d\u00e9finir pr\u00e9cis\u00e9ment les besoins et cadrer les transformations strat\u00e9giques, organisationnelles, techniques et l\u00e9gales de ce \u201cpassage \u00e0 l\u2019\u00e9chelle\u201d. D\u2019o\u00f9 le buzz, qu\u2019alimentent par ailleurs les acteurs du paysage technologique!<\/p>\n<p>&nbsp;<\/p>\n<p>Lire aussi les articles :<\/p>\n<p><a href=\"http:\/\/www.solucominsight.fr\/2012\/02\/quest-ce-que-le-paysage-technologique-du-big-data\/\" target=\"_blank\">Quel est le paysage du Big Data<\/a><\/p>\n<p><a href=\"http:\/\/www.solucominsight.fr\/2012\/02\/comment-faire-face-a-l%E2%80%99emergence-du-phenomene-big-data\/\">Comment faire face \u00e0 l&#8217;\u00e9mergence du ph\u00e9nom\u00e8ne Big Data<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Article r\u00e9dig\u00e9 en collaboration avec \u00a0Mathieu Millet] LGA (Lise Gasnier) : C\u2019est le big buzz de 2011 qui ne manquera pas de faire du bruit cette ann\u00e9e encore! Il d\u00e9signe les ensembles de donn\u00e9es aux volum\u00e9trie et complexit\u00e9 telles qu\u2019il&#8230;<\/p>\n","protected":false},"author":40,"featured_media":3386,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"page-templates\/tmpl-one.php","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[35],"tags":[318,189,314,59,317,315,224,316],"coauthors":[883,798],"class_list":["post-1237","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-strategie-projets-it","tag-analytique","tag-big-data","tag-definition","tag-donnees","tag-non-structurees","tag-petaoctets","tag-stockage","tag-velocite"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu\u2019est-ce que le Big Data ? - RiskInsight<\/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:\/\/www.riskinsight-wavestone.com\/2012\/01\/quest-ce-que-le-big-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu\u2019est-ce que le Big Data ? - RiskInsight\" \/>\n<meta property=\"og:description\" content=\"[Article r\u00e9dig\u00e9 en collaboration avec \u00a0Mathieu Millet] LGA (Lise Gasnier) : C\u2019est le big buzz de 2011 qui ne manquera pas de faire du bruit cette ann\u00e9e encore! 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