{"id":2104,"date":"2010-12-08T07:59:00","date_gmt":"2010-12-08T06:59:00","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/automatic-storage-management-asm-pourquoi-pas\/"},"modified":"2010-12-08T07:59:00","modified_gmt":"2010-12-08T06:59:00","slug":"automatic-storage-management-asm-pourquoi-pas","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/automatic-storage-management-asm-pourquoi-pas\/","title":{"rendered":"Automatic Storage Management (ASM) : pourquoi pas ?"},"content":{"rendered":"

Depuis la sortie de la version Oracle 11g R2, il y a d\u00e9sormais de nombreuses raisons d’utiliser ASM (Automatic Storage Management) pour g\u00e9rer l’espace disque des bases de donn\u00e9es Oracle.<\/p>\n

Souvent, je\/on m’interroge sur les avantages de ce choix. Je vais donc essayer de faire le tour des\u00a0 situations dans lesquelles il y a avantage \u00e0 utiliser cette fonctionnalit\u00e9.<\/p>\n

\u00a0Int\u00e9r\u00eats en fonction de l’architecture<\/h3>\n

Concr\u00e8tement – pour le DBA comme pour l’administrateur du systeme – ASM apporte une diminution de l’empilement des technologies.<\/p>\n\n\n\n\n\n\n
Architecture<\/strong><\/td>\nCommentaire<\/strong><\/td>\n<\/tr>\n
Cluster Actif\/Actif simple<\/td>\nMise en oeuvre plus simple que les “raw device”.Pas besoin d’un produit tiers pour assurer le partage des disques.<\/p>\n

Autorise l’utilisation d’une Standard Edition sans surco\u00fbt en licence.<\/td>\n<\/tr>\n

Cluster Actif\/ Actif g\u00e9ographique<\/td>\nAssure un mirroring “host based”, plus r\u00e9actif en cas d’incident sur un site.Pas besoin d’un produit tiers pour assurer le partage des disques et la maintenance du mirroring sur le site distant.<\/td>\n<\/tr>\n
Standalone serveur<\/td>\nPermet d’\u00e9viter l’achat d’une solution de stockage co\u00fbteuse, puisque ASM peut g\u00e9rer \u00e0 la fois le mirroring et la r\u00e9partition sur les axes disques qui sont allou\u00e9s \u00e0 un espace de stockage.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Avantages pour l’exploitation d’un serveur<\/h3>\n

Et dans l’exploitation d’un serveur, qu’apporte ASM ?<\/p>\n

    \n
  • Pour le DBA : une vue plus fine de l’utilisation de ces espaces disques par les instances, \u00e0 la fois en volumes et en performances d’entr\u00e9es et de sorties.<\/li>\n<\/ul>\n

    \"DiskresponseTime\"<\/p>\n

    \"\"<\/p>\n

      \n
    • Pour les situations moins fr\u00e9quentes comme la migration de bases, ou le changement de disque ou LUN : une plus grande transparence pour l’utilisateur final.<\/li>\n<\/ul>\n

      Comparaison du processus d’ajout d’un disque<\/h3>\n

      Il nous faut d’abord d\u00e9crire une organisation physique pour permettre la comparaison. Nous prendrons le cas simple d’un serveur standalone : Un disque de 120 Go est plein et on veut y ajouter un nouveau disque de 120 Go.<\/p>\n

      Voici les actions pour 3 syst\u00e8mes :<\/p>\n\n\n\n\n\n\n\n\n\n\n
      Action<\/strong><\/td>\nLinux-LVM<\/strong><\/td>\nWindows<\/strong><\/td>\nASM\u00a0 tout OS<\/strong><\/td>\nCommentaires<\/strong><\/td>\n<\/tr>\n
      Partionnement<\/strong><\/td>\nOK<\/td>\nOK<\/td>\nOK<\/td>\n<\/td>\n<\/tr>\n
      Ajout du disque<\/strong><\/td>\nInitialisation de la partition pour int\u00e9gration dans un volume group.<\/td>\nImpossible<\/td>\nMarquage ASM<\/td>\nPour Windows, utiliser un driver assurant le Raid 0 est obligatoire pour permettre une extension.<\/td>\n<\/tr>\n
      <\/td>\nAjout au volume goup<\/td>\n<\/td>\nAjout au DiskGroup<\/td>\nASM r\u00e9organise automatiquement les espaces.<\/td>\n<\/tr>\n
      <\/td>\nExtension du logical volume<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
      <\/td>\nD\u00e9montage du file system<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
      <\/td>\nExtension du file system<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
      <\/td>\nMontage du file system<\/td>\n<\/td>\n<\/td>\nLes donn\u00e9es ne sont pas \u00e9qulibr\u00e9es sur les deux disques.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Comme vous pouvez le voir, Automatic Storage Management (ASM) simplifie l’action d’ajout de disque. Il en est de m\u00eame pour la suppression de disque, dans la mesure ou l’espace disque est suffisant pour accepter la suppression du disque.<\/p>\n

      Bonne chance dans l’utilisation d’ASM !<\/p>\n","protected":false},"excerpt":{"rendered":"

      Depuis la sortie de la version Oracle 11g R2, il y a d\u00e9sormais de nombreuses raisons d’utiliser ASM (Automatic Storage Management) pour g\u00e9rer l’espace disque des bases de donn\u00e9es Oracle.<\/p>\n

      Souvent, je\/on m’interroge sur les avantages de ce choix. Je vais donc essayer de faire le tour des situations ou il y a avantage \u00e0 utiliser cet outil.<\/p>\n","protected":false},"author":27,"featured_media":17,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[42],"tags":[37,38,23,17],"class_list":["post-2104","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-operating-systems","tag-asm","tag-cluster","tag-dba","tag-oracle-11g"],"yoast_head":"\nAutomatic Storage Management (ASM) : pourquoi pas ? - dbi services | Blog<\/title>\n<meta name=\"description\" content=\"Ce posting montre les avantages d'utilisation d'ASM (Automatic Storage Management) pour g\u00e9rer l'espace disque des bases de donn\u00e9es Oracle depuis la version 11g R2 (11.2).\" \/>\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.dbi-services.com\/blog\/automatic-storage-management-asm-pourquoi-pas\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Automatic Storage Management (ASM) : pourquoi pas ?\" \/>\n<meta property=\"og:description\" content=\"Ce posting montre les avantages d'utilisation d'ASM (Automatic Storage Management) pour g\u00e9rer l'espace disque des bases de donn\u00e9es Oracle depuis la version 11g R2 (11.2).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/automatic-storage-management-asm-pourquoi-pas\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi services | Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/dbiservices\/\" \/>\n<meta property=\"article:published_time\" content=\"2010-12-08T06:59:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/2022\/01\/DiskresponseTime.png\" \/>\n\t<meta property=\"og:image:width\" content=\"791\" \/>\n\t<meta property=\"og:image:height\" content=\"387\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Oracle Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@dbiservices\" \/>\n<meta name=\"twitter:site\" content=\"@dbiservices\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Oracle Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/automatic-storage-management-asm-pourquoi-pas\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/automatic-storage-management-asm-pourquoi-pas\\\/\"},\"author\":{\"name\":\"Oracle Team\",\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/#\\\/schema\\\/person\\\/bf7c7eb0bec165183207237c9d0ee1d5\"},\"headline\":\"Automatic Storage Management (ASM) : pourquoi pas ?\",\"datePublished\":\"2010-12-08T06:59:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/automatic-storage-management-asm-pourquoi-pas\\\/\"},\"wordCount\":480,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/automatic-storage-management-asm-pourquoi-pas\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/DiskresponseTime.png\",\"keywords\":[\"ASM\",\"Cluster\",\"DBA\",\"Oracle 11g\"],\"articleSection\":[\"Operating System\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/automatic-storage-management-asm-pourquoi-pas\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/automatic-storage-management-asm-pourquoi-pas\\\/\",\"url\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/automatic-storage-management-asm-pourquoi-pas\\\/\",\"name\":\"Automatic Storage Management (ASM) : pourquoi pas ? 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