{"id":3516,"date":"2013-08-05T14:11:15","date_gmt":"2013-08-05T12:11:15","guid":{"rendered":"http:\/\/tk-mag.talkabout.de\/?p=3516"},"modified":"2023-02-23T11:36:43","modified_gmt":"2023-02-23T10:36:43","slug":"was-ist-alua-asymmetric-logical-unit-access","status":"publish","type":"post","link":"https:\/\/www.thomas-krenn.com\/de\/tkmag\/expertentipps\/was-ist-alua-asymmetric-logical-unit-access\/","title":{"rendered":"Was ist ALUA (Asymmetric Logical Unit Access)?"},"content":{"rendered":"<p>Dieser Artikel beschreibt was sich hinter ALUA &#8211;&nbsp;<b>Asymmetric Logical Unit Access<\/b>&nbsp;verbirgt und wann dieses Protokoll zum Einsatz kommt.<\/p>\n<h3>Beschreibung<\/h3>\n<p>ALUA beschreibt ein standardisiertes Protokoll im SCSI Standard f\u00fcr den Zugriff auf ein LUN \u00fcber mehrere Controller eines Speichersystems. F\u00fcr ein Speichersystem mit nur einem Controller spielt ALUA keine Rolle.<\/p>\n<h3>Folgende Zeichnung veranschaulicht den Zusammenhang<\/h3>\n<p><a href=\"https:\/\/www.thomas-krenn.com\/de\/tkmag\/wp-content\/uploads\/2013\/08\/Alua_lun_zuordnung.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-5443 alignnone\" title=\"Alua Lun Zuordnung\" src=\"https:\/\/www.thomas-krenn.com\/de\/tkmag\/wp-content\/uploads\/2013\/08\/Alua_lun_zuordnung-300x269.jpg\" alt=\"Alua_lun_zuordnung\" width=\"300\" height=\"269\" srcset=\"https:\/\/www.thomas-krenn.com\/de\/tkmag\/wp-content\/uploads\/2013\/08\/Alua_lun_zuordnung-300x269.jpg 300w, https:\/\/www.thomas-krenn.com\/de\/tkmag\/wp-content\/uploads\/2013\/08\/Alua_lun_zuordnung-200x179.jpg 200w, https:\/\/www.thomas-krenn.com\/de\/tkmag\/wp-content\/uploads\/2013\/08\/Alua_lun_zuordnung.jpg 350w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Die LUN ist damit f\u00fcr den Host \u00fcber 2 Pfade sichtbar, wobei ein Controller die LUN &#8222;besitzt&#8220; und damit auch den optimierten Pfad bereitstellt. \u00dcber den 2. Controller ist der nicht-optimierte Pfad verf\u00fcgbar. Durch ALUA kann auf der Host Seite dann die entsprechende Pfad-Richtlinie (<b>Path Selection Policy<\/b>&nbsp;&#8211;&nbsp;<b>PSP<\/b>) eingestellt werden &#8211; bspw. Round-Robin. F\u00e4llt der 1. Controller aus, \u00fcbernimmt der 2. Controller die LUN und stellt es \u00fcber den verf\u00fcgbaren Pfad bereit.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Weitere Weblinks:<\/strong><\/span><\/p>\n<ul>\n<li><a href=\"http:\/\/virtualgeek.typepad.com\/virtual_geek\/2009\/09\/a-couple-important-alua-and-srm-notes.html\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">http:\/\/virtualgeek.typepad.com\/virtual_geek\/2009\/09\/a-couple-important-alua-and-srm-notes.html<\/a><\/li>\n<li><a href=\"http:\/\/www.yellow-bricks.com\/2009\/09\/29\/whats-that-alua-exactly\/#comment-24409\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">http:\/\/www.yellow-bricks.com\/2009\/09\/29\/whats-that-alua-exactly\/#comment-24409<br \/>\n<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<div style=\"background-color: #f2f2f2; padding: 15px; height: auto; vertical-align: middle;\">\n<div style=\"display: inline-block; background-color: #f2f2f2; margin-right: 15px; vertical-align: middle; width: 80px; height: auto;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft  wp-image-8932\" src=\"https:\/\/www.thomas-krenn.com\/de\/tkmag\/wp-content\/uploads\/2013\/07\/Logo_Shop_TKmag_klein.png\" alt=\"Logo_Shop_TKmag_klein\" width=\"92\" height=\"31\"><\/div>\n<div style=\"display: inline-block; background-color: #000000; vertical-align: middle; width: 1px; height: 27px;\"><\/div>\n<div style=\"display: inline-block; background-color: #f2f2f2; margin-left: 15px; vertical-align: middle; width: 80%;\">Ihre indivduelle Netzwerkumgebung k\u00f6nnen Sie in unserem <a href=\"https:\/\/www.thomas-krenn.com\/de\/index.html\" target=\"_blank\" rel=\"noopener noreferrer\">TKshop<\/a> zusammenstellen.<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dieser Artikel beschreibt was sich hinter ALUA &#8211;&nbsp;Asymmetric Logical Unit Access&nbsp;verbirgt und wann dieses Protokoll zum Einsatz kommt. Beschreibung ALUA beschreibt ein standardisiertes Protokoll im SCSI Standard f\u00fcr den Zugriff[&#8230;]<\/p>\n","protected":false},"author":21,"featured_media":3746,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[45,107],"tags":[145,134,140],"class_list":["post-3516","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-expertentipps","category-netzwerk-zubehoer","tag-alua","tag-know-how","tag-lun","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Was ist ALUA (Asymmetric Logical Unit Access)? - TKmag<\/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.thomas-krenn.com\/de\/tkmag\/expertentipps\/was-ist-alua-asymmetric-logical-unit-access\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Was ist ALUA (Asymmetric Logical Unit Access)? - TKmag\" \/>\n<meta property=\"og:description\" content=\"Dieser Artikel beschreibt was sich hinter ALUA &#8211;&nbsp;Asymmetric Logical Unit Access&nbsp;verbirgt und wann dieses Protokoll zum Einsatz kommt. 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