{"id":26632,"date":"2016-06-01T01:03:59","date_gmt":"2016-05-31T23:03:59","guid":{"rendered":"http:\/\/e3mag.com\/?p=26632"},"modified":"2022-05-01T08:51:31","modified_gmt":"2022-05-01T06:51:31","slug":"a-besoin-de-hana-flash","status":"publish","type":"post","link":"https:\/\/e3mag.com\/fr\/a-besoin-de-hana-flash\/","title":{"rendered":"Hana a-t-elle besoin de Flash ?"},"content":{"rendered":"<p><a href=\"https:\/\/e3mag.com\/wp-content\/uploads\/2016\/06\/Thomas-Hermann.jpg\"><img loading=\"lazy\" decoding=\"async\" title=\"hana a-t-elle besoin de flash ?\" class=\"wp-image-26644 alignleft\" src=\"https:\/\/e3mag.com\/wp-content\/uploads\/2016\/06\/Thomas-Hermann.jpg\" alt=\"Thomas Hermann\" width=\"212\" height=\"328\" srcset=\"https:\/\/e3mag.com\/wp-content\/uploads\/2016\/06\/Thomas-Hermann.jpg 438w, https:\/\/e3mag.com\/wp-content\/uploads\/2016\/06\/Thomas-Hermann-100x155.jpg 100w\" sizes=\"auto, (max-width: 212px) 100vw, 212px\" \/><\/a>Les faibles temps de latence et les temps d'acc\u00e8s rapides de la technologie flash ont g\u00e9n\u00e9ralement un effet positif sur l'ensemble de l'environnement applicatif, m\u00eame si la vitesse de transaction des bases de donn\u00e9es est d\u00e9j\u00e0 acc\u00e9l\u00e9r\u00e9e par la technologie en m\u00e9moire. Mais ce que l'on oublie souvent de mentionner \u00e0 propos de la technologie flash, ce sont les arguments \u00e9conomiques.<\/p>\n<p>Dans le cadre de l'int\u00e9gration Hana Tailored Datacenter (TDI), le stockage d'entreprise doit \u00eatre certifi\u00e9 pour l'exploitation TDI. Si l'on compare le nombre de lecteurs n\u00e9cessaires pour faire fonctionner un n\u0153ud Hana conform\u00e9ment aux prescriptions SAP TDI, on constate que seul un tiers environ des lecteurs flash sont n\u00e9cessaires par rapport aux lecteurs SAS conventionnels. Cela permet donc d'\u00e9conomiser des co\u00fbts d'investissement et de r\u00e9duire les d\u00e9penses d'\u00e9nergie et de climatisation.<\/p>\n<p>En outre, les fonctions int\u00e9gr\u00e9es dans les syst\u00e8mes flash, telles que la d\u00e9duplication et la compression, peuvent contribuer de mani\u00e8re significative \u00e0 l'optimisation de l'infrastructure de stockage. Cela est encore plus vrai avec la technologie flash qu'avec les syst\u00e8mes bas\u00e9s sur des disques durs.<\/p>\n<p>Les faibles temps de latence ainsi que le haut d\u00e9bit de donn\u00e9es permettent d'appliquer des m\u00e9thodes de r\u00e9duction des donn\u00e9es nettement plus agressives, comme par exemple une d\u00e9duplication tr\u00e8s granulaire avec une compression en ligne.<\/p>\n<p>Les mesures effectu\u00e9es pour Hana montrent une r\u00e9duction des donn\u00e9es d'environ 40 pour cent. Selon le type de donn\u00e9es, il est possible d'atteindre une r\u00e9duction des donn\u00e9es allant jusqu'\u00e0 10:1, et ce sans solliciter l'infrastructure du serveur.<\/p>\n<p>L'une des particularit\u00e9s de la technologie de stockage de NetApp est l'int\u00e9gration de snapshots de stockage pour la sauvegarde des bases de donn\u00e9es Hana, disponible sp\u00e9cialement pour les clients Hana. Au lieu de copier de grandes quantit\u00e9s de donn\u00e9es sur un stockage de sauvegarde, ce qui entra\u00eene une charge consid\u00e9rable pour le serveur, le r\u00e9seau et le stockage, la solution int\u00e9gr\u00e9e \"Snap Creator Hana Plugin\" s'en charge en quelques secondes seulement.<\/p>\n<p>Les donn\u00e9es ne sont pas copi\u00e9es dans leur int\u00e9gralit\u00e9, seuls les blocs utilis\u00e9s par Hana sont \"gel\u00e9s\" et seuls les blocs modifi\u00e9s depuis la derni\u00e8re sauvegarde sont transf\u00e9r\u00e9s. Cela se fait sans aucune charge sur l'infrastructure Hana. Cette solution est \u00e9galement disponible pour les syst\u00e8mes de stockage AFF \u00e0 base de flash de NetApp.<\/p>\n<p>Tout d\u00e9pend donc de la vision globale : Le flash dans le centre de donn\u00e9es ne se limite pas \u00e0 l'am\u00e9lioration des temps d'acc\u00e8s et des vitesses de transfert. Il s'agit d'optimiser les co\u00fbts de stockage dans le centre de donn\u00e9es et cela a \u00e9galement un impact positif sur l'infrastructure Hana.<\/p>\n<p><a href=\"https:\/\/e3mag.com\/fr\/partenaires\/netapp-deutschland-gmbh\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" title=\"hana a-t-elle besoin de flash ?\" class=\"aligncenter wp-image-11373 size-full\" src=\"https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP.jpg\" alt=\"https:\/\/e3mag.com\/partners\/netapp-deutschland-gmbh\/\" width=\"1000\" height=\"112\" srcset=\"https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP.jpg 1000w, https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP-768x86.jpg 768w, https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP-100x11.jpg 100w, https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP-480x54.jpg 480w, https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP-640x72.jpg 640w, https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP-720x81.jpg 720w, https:\/\/e3mag.com\/wp-content\/uploads\/2017\/03\/CI-NETAPP-960x108.jpg 960w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>La question de savoir si la m\u00e9moire flash est int\u00e9ressante pour une technologie in-memory comme Hana revient r\u00e9guli\u00e8rement dans les discussions avec les clients. En effet, il y a de nombreuses raisons de miser sur la technologie flash.<\/p>","protected":false},"author":119,"featured_media":26633,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","footnotes":""},"categories":[5,1608],"tags":[65,5457,11706],"coauthors":[22424],"class_list":["post-26632","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-it-management","category-mag1606","tag-hana","tag-netapp","tag-tdi","pmpro-has-access"],"acf":[],"featured_image_urls_v2":{"full":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"thumbnail":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-150x150.jpg",150,150,true],"medium":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",400,182,false],"medium_large":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-768x349.jpg",768,349,true],"large":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"image-100":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-100x46.jpg",100,46,true],"image-480":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-480x218.jpg",480,218,true],"image-640":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-640x291.jpg",640,291,true],"image-720":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-720x328.jpg",720,328,true],"image-960":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-960x437.jpg",960,437,true],"image-1168":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"image-1440":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"image-1920":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"1536x1536":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"2048x2048":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"trp-custom-language-flag":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",18,8,false],"bricks_large_16x9":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"bricks_large":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"bricks_large_square":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",1000,455,false],"bricks_medium":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",600,273,false],"bricks_medium_square":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230.jpg",600,273,false],"profile_24":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-24x24.jpg",24,24,true],"profile_48":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-48x48.jpg",48,48,true],"profile_96":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-96x96.jpg",96,96,true],"profile_150":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-150x150.jpg",150,150,true],"profile_300":["https:\/\/e3mag.com\/wp-content\/uploads\/2017\/07\/shutterstock_632772230-300x300.jpg",300,300,true]},"post_excerpt_stackable_v2":"<p>Immer wieder taucht in Kundengespr\u00e4chen die Frage auf, ob sich Flash-Speicher bei einer In-memory-Technologie wie Hana lohnt. In der Tat gibt es viele Gr\u00fcnde, hier auf Flash zu setzen.<\/p>\n","category_list_v2":"<a href=\"https:\/\/e3mag.com\/fr\/categorie\/gestion-de-linformatique\/\" rel=\"category tag\">IT-Management<\/a>, <a href=\"https:\/\/e3mag.com\/fr\/categorie\/mag1606\/\" rel=\"category tag\">MAG 16-06<\/a>","author_info_v2":{"name":"Thomas Herrmann","url":"https:\/\/e3mag.com\/fr\/author\/thomas-herrmann\/"},"comments_num_v2":"0 commentaire","_links":{"self":[{"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/posts\/26632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/users\/119"}],"replies":[{"embeddable":true,"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/comments?post=26632"}],"version-history":[{"count":0,"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/posts\/26632\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/media\/26633"}],"wp:attachment":[{"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/media?parent=26632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/categories?post=26632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/tags?post=26632"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/e3mag.com\/fr\/wp-json\/wp\/v2\/coauthors?post=26632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}