Comments on: Introducing Oracle 11gR2 Edition Based Redefinition or: On Parallel Application Universes Friends of Oracle and Java Wed, 27 May 2015 22:00:57 +0000 hourly 1 By: Luohua Huang Fri, 30 Dec 2011 09:55:20 +0000 Carl,
Actually, it is a nearly zero downtime. After you did EBR enabled on your apps, then it has the capabilities to apply online patching. And it will have a minute-based downtime to switch the pre-upgrade and post-upgrade sessions. During this phase, you need to bounce the mid-tier.


By: Lucas Jellema Thu, 29 Dec 2011 14:24:54 +0000 Hi Kumar,

Do you mean the JDBC version? Or the Java version that is used for the Aurora VM inside the Oracle Database? (the latter is JDK 5)



By: Kumar Mon, 19 Dec 2011 10:40:05 +0000 Which java version is supported to 11gR2

By: Carl Bruneau Tue, 16 Feb 2010 15:17:48 +0000 Hello Lucas,

Congratulation for this presentation regarding EBR (Edition-based Redefinition)!!!

But I don’t see how we can achieve zero downtime.

Let’s take an example:

From the pre_upg edition to the post_upg edition we have to convert the data in one table.

The behavior in the edition triggers and view is based on the state of the data in this table.

If we want zero downtime, we have to synchronize the commit (that modified the data in the table) with the creation of the edition triggers and views. It’s not possible to have everything set at the same time. Thus we can have glitch…

Am I clear enought?

Best regards.