Components

Database Migration from non-CDB to PDB – Migration with Data Pump

You may have realized that there are a few techniques missing describing how to do a Database Migration from non-CDB to PDB – Migration with Data Pump is one of them. I will explain the most simple approach of going to Single- or Multitenant. It isn’t the coolest – and it isn’t very fast as soon as your database has a significant size. But it is not complex. And it allows you to move even from very old versions directly into an Oracle 19c PDB – regardless of patch levels or source and destination platform.

Database Migration from non-CDB to PDB – Migration with Data Pump

High Level Overview

Endianness change
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Database Migration from non-CDB to PDB – Various Pitfalls

There are several pitfalls when you plugin a non-CDB into a CDB environment. I’d like to highlight some of them – and show you potential workarounds as well. This is part of a series of blog posts to make your migration from non-CDB to PDB a bit smoother.

Database Migration from non-CDB to PDB - Various Pitfalls

Photo by timJ on Unsplash

Database Migration from non-CDB to PDB – Various Pitfalls

In all the previous blog posts of this series I tried to explain specific pitfalls, and how you can workaround them. This article is meant to collect the “leftovers”, the minor issues and pitfalls which you may not … [ Read more ]

Database Migration from non-CDB to PDB – The Patch Level Pitfall

There are several pitfalls when you plugin a non-CDB into a CDB environment. I’d like to highlight some of them – and show you potential workarounds as well. This is part of a series of blog posts to make your migration from non-CDB to PDB a bit smoother.

Database Migration from non-CDB to PDB - The Patch Level Pitfall

Photo by Piron Guillaume on Unsplash

Database Migration from non-CDB to PDB – The Patch Level Pitfall

When you consolidate on a larger scale, it is very likely that you have different patch levels in your database environments. But when you attempt to plugin a non-CDB into a CDB, you may see … [ Read more ]

Database Migration from non-CDB to PDB – The Component Pitfall

There are several pitfalls when you plugin a non-CDB into a CDB environment. I’d like to highlight some of them – and show you potential workarounds as well. This is part of a series of blog posts to make your migration from non-CDB to PDB a bit smoother.

Database Migration from non-CDB to PDB - The Component Pitfall

Photo by Brett Jordan on Unsplash

The Component Pitfall

With component we mean the database component which you can find in DBA_REGISTRY – or CDB_REGISTRY. When Multitenant became available over 5 years ago, a decision had been made to make all options/components mandatory in a container database. This decision had to … [ Read more ]

Be aware of database options selections for PDBs in DBCA

I did blog about several things-to-know with DBCA (Database Configuration Assistant) in the past. And one issue came up in our internal mailing list the other day. Be aware of database options selections for PDBs in DBCA. Missing one or the other “click” may bring you in trouble later on. I blogged about this already a while ago but this was only part of a larger post: Create Multitenant Databases with DBCA – Things to Know.

Be aware of database options selections for PDBs in DBCA

When you create a custom container database with DBCA you will see this … [ Read more ]

Create Multitenant databases with DBCA – Things to Know

Create Multitenant databases with DBCA - Things to KnowWhen you create Multitenant databases with DBCA there are some Things to Know. And in Oracle Database 12.2.0.1’s Database Creation Assistant (DBCA) there is a common pitfall in the “Options” screen. It was grayed out in the previous release but when you choose to create a “custom” database you can select the options/components now. Be careful …

Previous posts

I did blog several times about the DBCA already:

And … [ Read more ]

Remove and Clean Up Components from Oracle Database 11.2 – 12.2

Remove and Clean Up Components - Oracle 11.2 - 12.2Remove and Clean Up Components - Oracle 11.2 - 12.2

I will start a series of blog posts on how to remove and clean up components from Oracle Database 11.2 – 12.2.

Precaution

This series of blog posts is not meant to recommend the removal of any options from an Oracle Database. It is not meant to create any sort of negativeness on any of the components or options. It’s is only meant to give you some advice and guideline in the case you’ll need to remove something.

The OUI (Oracle Universal Installer) installed everything on disk – and there’s a very good reason to do this. The purpose … [ Read more ]

Install components in Multitenant ALWAYS with catcon.pl

I did blog several times about how to remove an unwanted component from a database. But yesterday I came across this interesting scenario worth a blog post.

How to install a component afterwards in Single-/Multitenant?

I haven’t checked all the MOS Notes but I recognized that some MOS Notes explaining how to (re-)create a component such as JVM are not updated to deal with a Single and/or Multitenant environment as they simply call the scripts from SQL*Plus. But the key to script execution in such an environment is catcon.pl, the perl driver meant to execute database scripts not only in … [ Read more ]

Create Container Databases (CDB) with less options – it’s now supported in Oracle 12.1.0.2

When Oracle Multitenant was launched Roy and I amongst many other people always mentioned that the requirement of having all options in a Container Database (CDB$ROOT), and therefore also for the PDB$SEED with the immediate result that all PDBs provisioned from the PDB$SEED will have all options as well, will hinder customer adoption significantly. But this has been changed now. You can create Container Databases (CDB) with less options – it’s now supported in Oracle 12.1.0.2.

Create Container Databases (CDB) with less options – it’s now supported in Oracle 12.1.0.2

Almost all customers I have talked to in the … [ Read more ]

Rules Manager and Expression Filter getting removed

I doubt that many people are using the Oracle features “Rules Manager” and “Expression Filter” as usually people handle these things (such as ensuring that a zip code or a car number plate has a certain format) within the application code and not inside the database. Oracle Beehive for instance uses that just on the side.

Anyway, just learned today that Rules Manager and Expression Filter components will get removed once our next database release most likely called Oracle Database 12c will get released. So before upgrading to Oracle Database 12c you can remove EXF and … [ Read more ]

Database Registry: Component Dependencies

Recently I had to dig a bit into the component dependency topic as I was working with an Oracle Database 10.1.0.5 customer planning to upgrade to Oracle Database 11.2.0.2 with a limited downtime window. To achieve the given downtime window we planned to remove some unused components from the database.

Database Component Dependencies
Example: Component Dependencies in Oracle Database 11.1

As you know already the time it’ll take to upgrade an Oracle database is mainly dependent on the number of installed components. If you’ll query DBA_REGISTRY (or the underlying REGISTRY$) you’ll spot all the installed (and usually configured) database components. And the … [ Read more ]