TOI

Restore datafile from service: A cool #Oracle 12c Feature

You can restore a datafile directly from a physical standby database to the primary. Over the network. With compressed backupsets. How cool is that?

Here’s a demo from my present class Oracle Database 12c: Data Guard Administration. prima is the primary database on host01, physt is a physical standby database on host03. There is an Oracle Net configuration on both hosts that enable host01 to tnsping physt and host03 to tnsping prima

 

Data Guard 12c New Features: Far Sync & Real-Time Cascade

UKOUG Oracle Scene has published my article about two exciting Data Guard 12c New Features:

http://viewer.zmags.com/publication/62b883ad#/62b883ad/44

Far Sync Instance enables Zero-Data-Loss across large distance

Hope you find it useful :-)

Common Users & SYSDBA with #Oracle 12c Multitenancy

A 12c multitenant database introduces the new concept of local users and common users. This article shows simple use cases why DBAs may want to create common users – in contrast to the common users that are created automatically, like SYS, SYSTEM, MDSYS etc.

A typical requirement is to have a superuser other than SYS, but with the same power. Like the common user C##_SYS in the picture below.

Or suppose we have many pluggable databases (PDBs) and different superusers responsible for different PDBs like C##_ADMIN1 and C##_ADMIN2:

HA of Database Control for RAC made easy

When you install an 11g RAC database without Grid Control respectively Cloud Control present, this is what the DBCA will give you:

RAC_dbconsole1There is one Database Control OC4J Container only, running on host01. Should host01 go down, the Enterprise Manager is no longer available now. We could make that a resource, known to the clusterware and let it failover in that case. But also – and even easier – we can start a second OC4J Container to run on host02 simultaneously like this:

Consider speaking at #ukoug_tech14

The call for papers is still open for UKOUG Tech 14 – a great event to speak at for sure!

UKOUG Tech 14The board explicitly encourages first-time speakers and women to submit an abstract.

Both doesn’t apply for me, but I have submitted abstracts in spite :-)

I can say only the best about the past annual conferences of the UK Oracle User Group. Great speakers, very good conditions and an excellent opportunity to get in touch with other Oracle enthusiasts.

Online Move of Datafiles for Pluggable Databases

From my present Oracle Database 12c New Features course in Zürich: We have introduced the handy new functionality that you can move datafiles online in 12c. That is at first glance having an issue for pluggable databases:

 

LVC Producers at #Oracle University

LVC stands for Live Virtual Class – this is how we call our courses done interactively over the internet. At Oracle University, we have a fine crew of people who take care that the attendees (as well as the instructor, sometimes) are not impacted by technical problems. This can be e.g. connectivity issues, browser incompatibilities, questions how to deal with the learning platform WebEx or which way to choose to access the remote lab environment. All that and more is handled by LVC producers, so that the instructor can focus on the educational matters. I really appreciate this separation of duties, because I find it already demanding enough to deliver high quality Oracle Technology classes!

#Oracle University Expert Summit in London

Three days full of seminars are offered by Oracle University in London (19th to 21st May) at the Expert Summit

Oracle University Expert Summit

It is my pleasure to present there together with Arup Nanda, Dan Hotka, Jonathan Lewis and my dear colleagues Iloon Ellen-Wolff and Joel Goodman.

Dealing with technical questions about #Oracle

During the OCM Preparation Workshop today in Bucharest, we got into a discussion about parallel inserts vs. direct load with append hint, where I said something like: “I think a parallel insert is always* also a direct load.” Most attendees were satisfied with that, but some still looked a bit sceptical. And I was also not 100% sure about it. While the others practiced, I did a brief research and came up with this answer from Tom Kyte and quoted him: “Parallel is always a direct path, if you go parallel, you will be appending.” Everybody in the room was immediately convinced – only I felt a bit uncomfortable with the outcome myself. After all, I don’t want to teach people to blindly follow my or any other guys claims without checking it if possible.

Impressions from #oug_ire 2014

The Oracle User Group Ireland had its annual conference for 2014 at the Convention Centre in Dublin – which is a very nice location:

Convention Centre in DublinThere have been many well known Oracle Experts speaking, as you can see from the agenda. Oracle University was represented by Joel Goodman and myself – we really enjoyed talking there and listening to the other speakers :-)