Some time ago, my colleague Michael Schwalm wrote about a new Oracle Database 12c feature for moving database files online. In this post, we will not describe the syntax of the command, but focus on Oracle internals. To do that, I have written a tiny test protocol composed of two parts: Session 1: starts a batch (schema BATCH) processing which…
Gone are the days where you had to put a tablespace or your complete database offline in order to move or rename a datafile. Oracle 12c features a new command that allows to move datafiles when both database and datafile are online! Up to Oracle 11.2.0.3, you had three ways to relocate a datafile: Put the tablespace offline Put the…
As you probably know, the multitenant databases is the new feature of Oracle 12c to solve the dilema of applications segregation. Thanks to a multitenant container database, it allows to manage many databases as one taking advantage of resources consolidation. A perfect way to manage several applications in a single container. However are these plugglable databases that isolated as expected?…
What is finally the primary objective of a database? Storing Data 
The question is, how Oracle makes it. For many beginners a confusing topic is
to get the picture between physical storage and logical one. So how does it works?
