More often than not, migrating a database is not much about moving the data but about ensuring that nothing was lost in the process. In all migration projects, a DBA will have to answer the following question: “Is my target database really identical to the source ?“ This is what Oracle GoldenGate Veridata was made for, and before diving into…
In this blog I want to introduce some of the new features of the Oracle 23c developer edition. It will be only a selection of some of the main features. It is not the intention to give you a thorough picture of all the features in this blog. I have tested some of the essential ones (in my opinion) on…
The Oracle 23c new feature Lock Free Reservations allows to break with the traditional locking mechanism. Now multiple concurrent sessions can update the same row without be blocked !!! Let’s see how it works. In the traditional locking mechanism, when a first session modifies a row, oracle will hold 2 locks : If a second session tries to update the…
This blog comes to complete the excellent blog written by my colleague Gregory Steulet on the same topic. SQL FIREWALL is a new security layer integrated into Oracle Database 23c. First, we create a admin user for which we grant it a new admin privilege “sql_firewall_admin”: We enable the SQL FIREWALL: We create a capture process on the user LFE:…
Introduction Out of the 300 features encapsulated in the new Oracle 23c database, I’ve chosen to write during the Oracle CloudWord a brief blog post about a feature that particularly caught my attention: Automatic Transaction Rollback. Starting from version 23c, Oracle enables automatic transaction rollback with parameters to manage this functionality. Through this blog post I’ll demonstrate, with a practical…
Introduction It is true that it’s a somewhat daring title, and it’s unlikely that SQL firewall has changed anything about the attack that several casinos in Las Vegas suffered last week. However, the opportunity was too good to pass up on this topic. As I write this blog, Las Vegas casinos are experiencing a series of cyberattacks. It turns out…
Oracle provides an OVA (Open Virtual Appliance) file to install the 23c Free Developer Release on Virtualbox. An OVA file contains metadata and file elements in the Open Virtual Format (OVF) to package and distribute one or more virtual machines. The OVA-file provided by Oracle can also be used to import the Oracle 23c Free VM to Proxmox. Here are…
Introduction On Oracle Database, Multitenant feature will be turning 9 in July, but it’s not yet widely deployed as most of the databases are still running on non-CDB architecture. With 19c, Multitenant is now mature and free if you stick to a maximum of 3 PDBs per CDB. If the benefits of Multitenant are not obvious at first glance, it’s…
