{"id":1006,"date":"2008-09-08T04:31:00","date_gmt":"2008-09-08T04:31:00","guid":{"rendered":"\/blogs\/paul\/post\/How-the-on-disk-data-structures-fit-together.aspx"},"modified":"2017-01-18T18:48:43","modified_gmt":"2017-01-19T02:48:43","slug":"how-the-on-disk-data-structures-fit-together","status":"publish","type":"post","link":"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/","title":{"rendered":"How the on-disk data structures fit together"},"content":{"rendered":"<p><font face=\"Verdana\" size=\"2\"><\/p>\n<p>\nIn the last few classes I&#39;ve taught, we&#39;ve discussed the on-disk structures where everything is stored in a database, and I&#39;ve also been asked privately where all the info is on my blog. I know that a lot of people reading my blog now are new in the last six months or so and will have missed some of the earlier foundation info I posted. Now, admittedly, there&#39;s a ton of stuff in my blog archive and most people have limited time to go trawling through it, so I&#39;ll do a few posts that just list suggested reading based on my posts.\n<\/p>\n<p>\nFirst up&nbsp;are on-disk structures &#8211; here are the posts to read:\n<\/p>\n<ul>\n<li><font color=\"#696969\"><a href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/inside-the-storage-engine-anatomy-of-a-record\/\" target=\"_blank\">Inside the Storage Engine: Anatomy of a record<\/a><\/font> <\/li>\n<li><font color=\"#696969\"><a href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/inside-the-storage-engine-anatomy-of-a-page\/\" target=\"_blank\">Inside the Storage Engine: Anatomy of a page<\/a><\/font> <\/li>\n<li><font color=\"#696969\"><a href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/inside-the-storage-engine-anatomy-of-an-extent\/\" target=\"_blank\">Inside the Storage Engine: Anatomy of an extent<\/a><\/font> <\/li>\n<li><font color=\"#696969\"><a href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/inside-the-storage-engine-iam-pages-iam-chains-and-allocation-units\/\" target=\"_blank\">Inside the Storage Engine: IAM pages, IAM chains, and allocation units<\/a><\/font> <\/li>\n<li><font color=\"#696969\"><a href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/inside-the-storage-engine-gam-sgam-pfs-and-other-allocation-maps\/\" target=\"_blank\">Inside The Storage Engine: GAM, SGAM, PFS and other allocation maps<\/a><\/font> <\/li>\n<li><font color=\"#696969\"><a href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/search-engine-qa-20-boot-pages-and-boot-page-corruption\/\" target=\"_blank\">Search Engine Q&amp;A #20: Boot pages, and boot page corruption<\/a><\/font> <\/li>\n<li><font color=\"#696969\"><a href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/search-engine-qa-21-file-header-pages-and-file-header-corruption\/\" target=\"_blank\">Search Engine Q&amp;A #21: File header pages, and file header corruption<\/a><\/font><\/li>\n<\/ul>\n<p>\nHave fun!\n<\/p>\n<p><\/font><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the last few classes I&#39;ve taught, we&#39;ve discussed the on-disk structures where everything is stored in a database, and I&#39;ve also been asked privately where all the info is on my blog. I know that a lot of people reading my blog now are new in the last six months or so and will [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,62],"tags":[],"class_list":["post-1006","post","type-post","status-publish","format-standard","hentry","category-inside-the-storage-engine","category-on-disk-structures"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How the on-disk data structures fit together - Paul S. Randal<\/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.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How the on-disk data structures fit together - Paul S. Randal\" \/>\n<meta property=\"og:description\" content=\"In the last few classes I&#039;ve taught, we&#039;ve discussed the on-disk structures where everything is stored in a database, and I&#039;ve also been asked privately where all the info is on my blog. I know that a lot of people reading my blog now are new in the last six months or so and will [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/\" \/>\n<meta property=\"og:site_name\" content=\"Paul S. Randal\" \/>\n<meta property=\"article:published_time\" content=\"2008-09-08T04:31:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-01-19T02:48:43+00:00\" \/>\n<meta name=\"author\" content=\"Paul Randal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Paul Randal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/\",\"url\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/\",\"name\":\"How the on-disk data structures fit together - Paul S. Randal\",\"isPartOf\":{\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/#website\"},\"datePublished\":\"2008-09-08T04:31:00+00:00\",\"dateModified\":\"2017-01-19T02:48:43+00:00\",\"author\":{\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/#\/schema\/person\/ffcec826c18782e1e0adf173826a7fce\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How the on-disk data structures fit together\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/#website\",\"url\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/\",\"name\":\"Paul S. Randal\",\"description\":\"In Recovery...\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/#\/schema\/person\/ffcec826c18782e1e0adf173826a7fce\",\"name\":\"Paul Randal\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/0b6a266bba2f088f2551ef529293001bd73bf026bc1908b9866728c062beeeb6?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/0b6a266bba2f088f2551ef529293001bd73bf026bc1908b9866728c062beeeb6?s=96&d=mm&r=g\",\"caption\":\"Paul Randal\"},\"sameAs\":[\"http:\/\/3.209.169.194\/blogs\/paul\"],\"url\":\"https:\/\/www.sqlskills.com\/blogs\/paul\/author\/paul\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How the on-disk data structures fit together - Paul S. Randal","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/","og_locale":"en_US","og_type":"article","og_title":"How the on-disk data structures fit together - Paul S. Randal","og_description":"In the last few classes I&#39;ve taught, we&#39;ve discussed the on-disk structures where everything is stored in a database, and I&#39;ve also been asked privately where all the info is on my blog. I know that a lot of people reading my blog now are new in the last six months or so and will [&hellip;]","og_url":"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/","og_site_name":"Paul S. Randal","article_published_time":"2008-09-08T04:31:00+00:00","article_modified_time":"2017-01-19T02:48:43+00:00","author":"Paul Randal","twitter_misc":{"Written by":"Paul Randal","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/","url":"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/","name":"How the on-disk data structures fit together - Paul S. Randal","isPartOf":{"@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/#website"},"datePublished":"2008-09-08T04:31:00+00:00","dateModified":"2017-01-19T02:48:43+00:00","author":{"@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/#\/schema\/person\/ffcec826c18782e1e0adf173826a7fce"},"breadcrumb":{"@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/how-the-on-disk-data-structures-fit-together\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.sqlskills.com\/blogs\/paul\/"},{"@type":"ListItem","position":2,"name":"How the on-disk data structures fit together"}]},{"@type":"WebSite","@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/#website","url":"https:\/\/www.sqlskills.com\/blogs\/paul\/","name":"Paul S. Randal","description":"In Recovery...","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.sqlskills.com\/blogs\/paul\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/#\/schema\/person\/ffcec826c18782e1e0adf173826a7fce","name":"Paul Randal","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.sqlskills.com\/blogs\/paul\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/0b6a266bba2f088f2551ef529293001bd73bf026bc1908b9866728c062beeeb6?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/0b6a266bba2f088f2551ef529293001bd73bf026bc1908b9866728c062beeeb6?s=96&d=mm&r=g","caption":"Paul Randal"},"sameAs":["http:\/\/3.209.169.194\/blogs\/paul"],"url":"https:\/\/www.sqlskills.com\/blogs\/paul\/author\/paul\/"}]}},"_links":{"self":[{"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/posts\/1006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/comments?post=1006"}],"version-history":[{"count":0,"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/posts\/1006\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/media?parent=1006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/categories?post=1006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sqlskills.com\/blogs\/paul\/wp-json\/wp\/v2\/tags?post=1006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}