{"id":10404,"date":"2016-03-02T22:41:16","date_gmt":"2016-03-03T02:41:16","guid":{"rendered":"http:\/\/onlineappsdba.com\/?p=10065"},"modified":"2016-05-04T04:54:12","modified_gmt":"2016-05-04T08:54:12","slug":"oracle-database-12c-multitenant-architecture-container-or-pluggable-database-cdbpdb","status":"publish","type":"post","link":"https:\/\/onlineappsdba.com\/index.php\/2016\/03\/02\/oracle-database-12c-multitenant-architecture-container-or-pluggable-database-cdbpdb\/","title":{"rendered":"Oracle Database 12c : Multitenant Architecture : Container or Pluggable Database CDB\/PDB"},"content":{"rendered":"<p><a href=\"https:\/\/onlineappsdba.com\/wp-content\/uploads\/2016\/02\/Oracle_Database_MultiTenant_Architecture_PDB_CDB.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-10101\" src=\"https:\/\/onlineappsdba.com\/wp-content\/uploads\/2016\/02\/Oracle_Database_MultiTenant_Architecture_PDB_CDB.png\" alt=\"Oracle_Database_MultiTenant_Architecture_PDB_CDB\" width=\"511\" height=\"314\" \/><\/a><\/p>\n<p>With the launch of <strong>database 12c<\/strong> in 2013, Oracle introduced a new architectural concept called <strong><a href=\"http:\/\/www.oracle.com\/technetwork\/database\/multitenant\/overview\/index.html\" target=\"_blank\">Multi-Tenancy<\/a><\/strong>, where you have a <strong>Container Database<\/strong> (CDB) and <strong>Pluggable Database<\/strong> (PDB).<\/p>\n<p>To explain I included video from <a href=\"https:\/\/twitter.com\/OracleAskTom\" target=\"_blank\">Tom Kyte<\/a> &amp; <strong>Randy Urbano\u00a0<\/strong>where Tom discuss about <strong>Pluggable Databases<\/strong> and <strong>challenges in Database Consolidation<\/strong>. Randy explains <strong>Architecture<\/strong> of PDB\/CDB and <strong>moves PDB<\/strong> from one CDB to another using SQL &gt; <span style=\"color: #ff0000;\">ALTER PLUGGABLE DATABASE &#8230;.<\/span><\/p>\n<p>https:\/\/www.youtube.com\/watch?v=2MrouEW9j88<\/p>\n<p><strong>Quiz<\/strong> (post answer under comments) : <span style=\"color: #ff0000;\">How many PDBs can be inside a CDB (hint watch the video)<\/span> ?<\/p>\n<p>Before running the <strong>Installer<\/strong> on an <strong>Linux<\/strong>\u00a0environment, packages (RPMs)\u00a0can be installed through <strong>yum<\/strong> to meet all the system per-requisites:<\/p>\n<p><strong>For Oracle Linux 6<\/strong> <strong>&#8211;<\/strong> <span style=\"color: #ff0000;\">yum install oracle-rdbms-server-12cR1-preinstall<\/span><\/p>\n<p><strong>For Oracle Linux 5 &#8211;<\/strong>\u00a0<span style=\"color: #ff0000;\">yum install oracle-validated -y<\/span><\/p>\n<p>Database <strong>software Installer<\/strong> and <strong>DBCA<\/strong> are similar to 11g, except for this screen where you can pre-configure your <strong>CDB<\/strong> and <strong>PDBs<\/strong>:<\/p>\n<p><a href=\"https:\/\/onlineappsdba.com\/wp-content\/uploads\/2016\/02\/23.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-10068\" src=\"https:\/\/onlineappsdba.com\/wp-content\/uploads\/2016\/02\/23-300x224.png\" alt=\"23\" width=\"383\" height=\"286\" \/><\/a><\/p>\n<p>This DBCA execution\u00a0will not only create a CDB and 1 PDB, but a \u201c<strong>seed pluggable database<\/strong>\u201d as well .\u00a0 You can use this <strong>seed database<\/strong> as a <strong>template to create other pluggable<\/strong> databases (PDBs).<\/p>\n<p><a href=\"https:\/\/onlineappsdba.com\/wp-content\/uploads\/2016\/02\/35.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-10070\" src=\"https:\/\/onlineappsdba.com\/wp-content\/uploads\/2016\/02\/35-300x209.png\" alt=\"35\" width=\"380\" height=\"265\" \/><\/a><\/p>\n<p>By default, after running the DBCA, all CDBs and PDBs are up and running.<\/p>\n<p>You must be having some basic questions after <a href=\"https:\/\/docs.oracle.com\/database\/121\/CNCPT\/cdbovrvw.htm#CNCPT89234\" target=\"_blank\">reading Oracle Database Multi-Tenancy Architecture<\/a>. So here are the answers.<\/p>\n<ul>\n<li><strong>Is there a difference when starting the listener and the CDB?<\/strong><\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\"><strong>No<\/strong>! \u00a0You can start the listener and your CDB in exactly the same way as you did with your pre-12c database.<\/span><\/p>\n<ul>\n<li><strong>How can you\u00a0connect to the CDB?<\/strong><\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\">Very simple: just the same as in past with pre-12c databases.<\/span><\/p>\n<p><span style=\"color: #ff0000;\"><strong>$\u00a0sqlplus system@&lt;CDB_db_name&gt;<\/strong><\/span><\/p>\n<p><span style=\"color: #ff0000;\">SQL*Plus: Release 12.1.0.2.0 Production on Sat Feb 27 09:13:31 2016<\/span><\/p>\n<p><span style=\"color: #ff0000;\">Copyright (c) 1982, 2014, Oracle. All rights reserved.<\/span><\/p>\n<p><span style=\"color: #ff0000;\">Enter password: <\/span><br \/>\n<span style=\"color: #ff0000;\">Last Successful login time: Tue Feb 23 2016 15:18:49 +00:00<\/span><\/p>\n<p><span style=\"color: #ff0000;\">Connected to:<\/span><br \/>\n<span style=\"color: #ff0000;\">Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 &#8211; 64bit Production<\/span><br \/>\n<span style=\"color: #ff0000;\">With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options<\/span><\/p>\n<ul>\n<li><strong>Are the PDBs opened by default, when starting the CDB?<\/strong><\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\">No. \u00a0This can be verified by SQL from view v$pdbs:<\/span><\/p>\n<p><span style=\"color: #ff0000;\">SQL&gt; select open_mode from v$pdbs where name='&lt;PDB_db_name&gt;\u2032;<\/span><\/p>\n<p><span style=\"color: #ff0000;\">OPEN_MODE<\/span><br \/>\n<span style=\"color: #ff0000;\"> \u2014\u2014\u2014-<\/span><br \/>\n<span style=\"color: #ff0000;\"> MOUNTED<\/span><\/p>\n<p>The PDB is mounted; to open it, just run this command:<\/p>\n<p><strong>SQL<\/strong>&gt; alter pluggable database &lt;PDB_db_name&gt; open read write;<\/p>\n<p><span style=\"color: #ff0000;\"><em>Pluggable database altered.<\/em><\/span><\/p>\n<p><strong>SQL<\/strong>&gt; select open_mode from v$pdbs where name='&lt;PDB_db_name&gt;\u2032;<\/p>\n<p><span style=\"color: #ff0000;\">OPEN_MODE<\/span><br \/>\n<span style=\"color: #ff0000;\"> \u2014\u2014\u2014-<\/span><br \/>\n<span style=\"color: #ff0000;\"> READ WRITE<\/span><\/p>\n<p><strong>Note<\/strong>: this must be done as \u201cSYSDBA\u201d.<\/p>\n<ul>\n<li><strong>How can we connect to the PDB?<\/strong><\/li>\n<\/ul>\n<p>There are 2 methods:<\/p>\n<p><strong>First method<\/strong>: connect to the CDB and then switch to the PDB by setting the container:<\/p>\n<p>$ sqlplus system@&lt;CDB_db_name&gt;<\/p>\n<p><strong>SQL<\/strong>&gt; show con_name<\/p>\n<p><span style=\"color: #ff0000;\">CON_NAME<\/span><br \/>\n<span style=\"color: #ff0000;\"> \u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014<\/span><br \/>\n<span style=\"color: #ff0000;\"> CDB$ROOT<\/span><br \/>\n<strong>SQL&gt; <\/strong>alter session set container=&lt;PDB_db_name&gt;;<\/p>\n<p><span style=\"color: #ff0000;\">Session altered.<\/span><\/p>\n<p><strong>Second method<\/strong>: Modify your <strong><span class=\"skimlinks-unlinked\">tnsnames.ora<\/span><\/strong> file by adding an entry for the PDB, based on the CDB entry.<\/p>\n<p>Now you can connect as usual to the PDB:<\/p>\n<p><strong>$ sqlplus system@&lt;PDB_db_name&gt;<\/strong><\/p>\n<p>As you can see, it is all quite easy. \u00a0One of the main benefits of this architecture is that you can\u00a0handle every PDB as a separate database that can be upgraded or plugged\/unplugged independently from other databases.<\/p>\n<div style=\"padding: 15px; margin-bottom: 15px; background: #ffffde; border: 1px solid #ddd; width: 85%;\" align=\"center\">\n<h2>Oracle DBA 12c Interview Question<\/h2>\n<p>In this you will getting free Interview Question related to become DataBase Admin<\/p>\n<p><a href=\"https:\/\/k21technologies.leadpages.co\/leadbox\/1472500f3f72a2%3A174d8c592346dc\/5710161838604288\/\" target=\"_blank\">Click Here to book you Subscription<\/a><\/p>\n<\/div>\n<p>This post is from our <a href=\"http:\/\/www.k21technologies.com\/oracle-dba-12c-training\" target=\"_blank\">Oracle Database 12c Training<\/a>\u00a0where We cover <strong>Architecture, Installation, File System, Backup and Recovery\u00a0<\/strong>and<strong> difference in 12c\u00a0<\/strong>from<strong> previous version <\/strong>with<strong> Hands-On<\/strong>, \u00a0If interested in learning Oracle Database 12c you can Register here for\u00a0<a href=\"http:\/\/www.k21technologies.com\/oracle-dba-12c-training\" target=\"_blank\">Oracle Database 12c Training\u00a0<\/a><\/p>\n<p>(<span style=\"color: #ff0000;\">There are limited early bird discount 50% OFF so if you are keen to learn and get trained on Oracle 12c Database as DBA then register for this course<\/span>).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>With the launch of database 12c in 2013, Oracle introduced a new architectural concept called Multi-Tenancy, where you have a [&hellip;]<\/p>\n","protected":false},"author":115,"featured_media":10406,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[424],"tags":[423],"class_list":["post-10404","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database","tag-trainings"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Oracle Database 12c : Multitenant Architecture : Container or Pluggable Database CDB\/PDB -<\/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:\/\/onlineappsdba.com\/index.php\/2016\/03\/02\/oracle-database-12c-multitenant-architecture-container-or-pluggable-database-cdbpdb\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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