There is a new feature listed in the docs as as “Support for PDBs with Different Character Sets, Time Zone File Versions, and Database Time Zones in a CDB”. I’ve already written about the PDB character set stuff and it is also listed separately as a new feature. The time zone stuff works in 12.1, so it doesn’t appear to be a 12.2 new feature. The different Time Zone File Versions functionality, as far as I can see, relates to OCI client connections to the server and was introduced in 11.2. With all that in mind, I’m really not sure what this listed new feature specifically relates to. If someone can clear that up for me I would be really grateful, as I’m wondering if I’ve just missed the point somewhere. 🙂
I’ve added these to the list of all my multitenant articles here.
It’s been over 2 years since 12c was released and there still seems to be a lot of confusion about the pluggable database stuff. I think most people know the top-level concept, there’s only so many times you can see the memory stick analogy before it gets burned on your skull, but that doesn’t do much to help with the reality of working with it day-to-day.
I’ve written a whole bunch of articles on pluggable databases (listed here), but even then I think there is quite a bit of text for what in many cases is a feature that consists of a single statement. 🙂
I’ve recently been pushing out some videos on this stuff and I’ve got some more already recorded for release while I’m at OOW. Of course, the articles allow you to copy/paste your way through an example, but I think the videos give a more accurate representation of just how simple some of this stuff is from a functional perspective. If you are interested, all the multitenant stuff will be added to this playlist as it is released.
I started trying to play with the Oracle multitenant option (all that pluggable database stuff) a little while ago and gave up. It’s wasn’t that it was that difficult. More than anything my problem was I didn’t know what to focus on first. There is so much to it and it’s all interrelated, so you start to write about one small piece and before you know it your article has lost focus and is growing too big. As a result I decided to let it simmer in the background and start looking at some of the other smaller 12c new features first…
My next stumbling block was just about everything in 12c seems to relate back to pluggable databases in some way. So you either pretend it doesn’t exist and have gaping wholes in everything you write, or you have to bite the bullet and get to grips with pluggable databases. So back I came to pluggable databases…
Even with my new found commitment to getting to grips with it, I was still struggling to decide how to break this stuff up into manageable pieces so I could write concise articles and order my thoughts on this functionality. Writing is part of my learning process, so if I can’t see how to break down and structure the articles I’m a little lost. Then the recently released OCP syllabus came to the rescue. I always try to write revision notes for the OCP upgrade exam, so I decided the way they break it down will be my template. I’m probably going to write a separate article per bullet point, and try and keep them as directed as possible.
Now I’ve got a plan of attack I feel a lot happier.
As always, I will make multiple passes and keep adding things to articles as I encounter things of interest. It’s always a fine balance between being too brief on one hand or regurgitating the manual on the other. The important thing is the content constantly evolves.
The other thing to consider is the OCP syllabus is only a starting point. There is lots of cool stuff that is not on the OCP syllabus, so I’m not going to be a slave to it. As I’ve said before, the OCP syllabus is a nice framework to start you on your journey, but it is not the final goal, it’s just a stepping stone…
I’m not sure why I felt the need to write this little 12c mission statement. Probably to help me solidify in my head how I’m going to tackle the next 18 months while I’m getting to grips with this new version. So that’s the plan, until I come up with a better one… 🙂