Moving Datafiles Online in Oracle 12c
I wrote about this feature in Hebrew quite some time ago but in the last week I was asked by couple of my customers about the correct way to move datafiles with minimal downtime so I thought it would be nice to show the Oracle 12c solution before talking about the solution I gave them.
For years, moving datafiles was a pain in the DBA behinds. It required some database action, then some OS actions and then some other database actions. Starting Oracle 12c we can now move datafile online, without interfering the application and without taking the tablespace offline or read only.
Even though Oracle 12c brought a lot of new features and changes, this feature must be one of my favorites. It made thing so easy and so simple that it made me wonder what took them so long…