{"id":52,"date":"2011-04-12T15:39:06","date_gmt":"2011-04-12T13:39:06","guid":{"rendered":"https:\/\/www.georgesdick.com\/?p=52"},"modified":"2011-04-12T15:39:06","modified_gmt":"2011-04-12T13:39:06","slug":"les-bases-clef-valeur","status":"publish","type":"post","link":"https:\/\/www.georgesdick.com\/?p=52","title":{"rendered":"Les bases clef \/ valeur"},"content":{"rendered":"<p>Certainement les syst\u00e8mes de gestion de donn\u00e9es les plus simples :<\/p>\n<p>Pour ces outils, un enregistrement ne se compose que d\u2019une clef permettant de le retrouver, et de donn\u00e9es totalement opaques pour le syst\u00e8me (aucune op\u00e9ration n\u2019est possible sur ces donn\u00e9es).<\/p>\n<p>L\u2019avantage d\u2019une telle simplicit\u00e9 (en plus de la vitesse li\u00e9e \u00e0 la r\u00e9duction du nombre de m\u00e9canismes impl\u00e9ment\u00e9s), est de simplifier la gestion des duplications et des r\u00e9conciliations d\u2019\u00e9critures divergentes.<\/p>\n<p>Il s\u2019agit du syst\u00e8me le plus embl\u00e9matique de la mouvance NoSQL : pas de tables, pas de join (et autres op\u00e9rations SQL complexes), pas d\u2019ACID, (etc.), mais une pr\u00e9disposition naturelle au fonctionnement sur des syst\u00e8mes tr\u00e8s largement distribu\u00e9s compos\u00e9s de serveurs \u00ab\u00a0de base\u00a0\u00bb.<\/p>\n<p>Le syst\u00e8me qui a inspir\u00e9 la plupart des autres est Dynamo (Amazon).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Certainement les syst\u00e8mes de gestion de donn\u00e9es les plus simples : Pour ces outils, un enregistrement ne se compose que d\u2019une clef permettant de le retrouver, et de donn\u00e9es totalement opaques pour le syst\u00e8me (aucune op\u00e9ration n\u2019est possible sur ces donn\u00e9es). L\u2019avantage d\u2019une telle simplicit\u00e9 (en plus de la vitesse li\u00e9e \u00e0 la r\u00e9duction du [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-52","post","type-post","status-publish","format-standard","hentry","category-nosql"],"_links":{"self":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/posts\/52","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=52"}],"version-history":[{"count":0,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/posts\/52\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}