Archive for the 'Community' Category

What is a “RAC Battle”?

RAC Battle [ræk ˈbæt̬l̩]

A “RAC Battle” is a format of presenting technology – two experts, battling against each other on pros and cons of Oracle Real Application Cluster. Björn Rost (Oracle ACE Director) and Martin Klier (Oracle ACE)

Björn Rost  Martin Klier

will fight

Wednesday November 18th, 2015
11 am
Nürnberg CCN (DOAG Konferenz 2015)
Room St. Petersburg

Who will be pro? Who will be con? We don’t know, we will decide by lot in front of the audience.

Be there, to see a technology event at its best in rounds, with no strings attached. Are you afraid of violence? Stay calm, Johannes Ahrends (Oracle ACE) will be the referee to avoid bloodshed.

Johannes Ahrends

Here’s the official RAC Battle link from DOAG.

Oracle 12c in practice – customer report in Cologne #12cjetzt

From Beta to Production – Oracle 12c at TGW
In October, I’ll speak at the Oracle #12jetzt (#12cnow) symposium in Köln (Cologne) about the introduction of 12c as standard palttform at our ISV customer TGW Software Services.

12c jetzt Symposium Header

I had the privilege to continuously working on the 12c product evaluation and introduction from availability of 12c beta2 until today. My company, Performing Databases, played the key role for creating and developing the guidelines of operation, configuration and licensing. My example will be the “new” development environment, to show the first steps of the project. The highlight of the talk will be the report about our migration from 9i to 12c at S.Spitz GmbH, the biggest food vendor in Austria.

October 15th
approx. 11am

Hyatt Regency Köln
Kennedy-Ufer 2A
50679 Köln

Please see the agenda here.

Link to the presentation here.

DOAG Database Conference 2015 begins #DOAGDB15

It’s time! June 16th, the DOAG Database Conference takes place in Düsseldorf, Van Der Valk Airport Hotel. Twenty-two specialized talks about Oracle Database, Replication, Tools and Security promise a great techie-day. See the schedule of lectures here.


I’m looking forward to seeing you there, having great corner talks about Oracle, life and lemons, tweeting with hashtag #DOAGDB15 and enjoying this great environment the hotel provides.

I’m also glad and honoured to be on the list of speakers: “Oracle Core for Beginners: In-Memory Column Store” at 11am.

Take care and see you tomorrow!

DOAG BI Conference: Oracle Core (for Beginners): In-Memory Column Store


On Thursday, April 23rd I’m speaking at DOAG BI 2015, the leading Oracle Business Intelligence Conference in Germany. (#DOAGBI15)

My contribution is: “Oracle Core für Einsteiger: In-Memory Columns Store”. The lecture will show, how the Oracle Database In-Memory option works “under the hood”, and how it is used to the best effect.

Please find the presentation here for download.


Looking forward to seeing you there, or discussing the presentation in the comments.


Chemnitzer Linux Tage 2015

Last weekend, I had the chance to attend the Linux Days Chemnitz. It’s an annual meeting of the German Linux family with roundabout 2,500 attendees and a FANTASTIC atmosphere. It was two days of hearing tech talks, enjoying rich nerd content and talkin’ shop.


Great atmosphere in the Great Hall


Great entrance gift: “Free Culture” by Lawrence Lessig. Thank you very much!

Read more…

Oracle ACE

I feel VERY proud, honoured and grateful, that Oracle awarded me with the Oracle ACE in December 2014. The Oracle ACE program is a community reward, and encourages us to participate, enrich, promote and organise Oracle community events.


When speaking about the community, first of all I’d like to highlight my Oracle User Group of Germany, the DOAG (Deutsche Oracle Anwendergruppe). They are doing lots of nice, and educational things, lifting the fog, and practicing free and self-assured community work. Helping to spread this in our region, at conferences and events, is a pleasure. I’m very proud to be part of this great team.

A little less, due to the geographical distance, but with very similar motivation and experience, I feel connected and involved with the U.S. pendant IOUG (Independent Oracle Users Group). They are open for the international crowd, and it simply feels good to be there.

And I want to say thank you to three people, for all they do, think and say about me. These very special folks are Björn, Craig and Dietmar. I’m proud to call you friends.

My Oracle ACE program shipment just arrived today.

My Oracle ACE program shipment just arrived today.

Just in case somebody cares, here’s my Oracle ACE profile.

I hope to keep up the level, and will continuously try hard to find the time to give back knowledge to the community.

Martin Klier

Speaker at DOAG 2015 Datenbank – “Oracle Core für Einsteiger: InMemory Column Store”

The DOAG 2015 Database conference is on the horizon: June 16, 2015 in Düsseldorf, Germany.

I’m proud to announce my participation as a speaker, as I was honoured with in the years before. This year, my part will be a new “Beginners” talk in German: “Oracle Core für Einsteiger: InMemory Column Store




Der Vortrag richtet sich an Einsteiger oder IT-Fachkräfte die nicht in Vollzeit als DBA arbeiten, jedoch Interesse an Datenbanktechnologie haben, bzw. für Entscheidungen hinsichtlich eingesetzter Technologien, Features und Lizenzen Anhaltspunkte suchen.

Der InMemory Column Store ist eine relativ neue Struktur der Oracle Datenbank 12c, und wird vom Hersteller massiv beworben. Der Vortrag möchte zeigen, wie diese sogenannte “In-memory Datenbank” konzipiert ist, funktioniert, und in welchen Szenarien sie sinnvoll eingesetzt werden kann.

I’m looking forward to seeing you there, for tech talk, hanging out and more tech talk. ;)
Martin Klier


DOAG Noon2Noon Event Nürnberg / MySQL vs. Oracle – Review

It was time to try something new in our DOAG Database Community. And please, please just not another frontal conference: twenty guys look forward, one looks back, like eight-oars-and-coxswain. I don’t know if DOAG invented it, but it was a success: The Noon2Noon Event.

How does it work? It’s like 24 hours of BarCamp, starting with a lunch, having a topic-of-the-day, lasting overnight, with winter barbecue, compatible for elders (thus, with Hotel and beds, no after-midnight hacking :) ). Ah, forgot to mention: One single talk being completely away from the topic, but somehow related to our work.

This first time, topic was “MySQL versus Oracle Database”. Johannes Ahrends and Oli Sennhauser as “headliners” ignited discussions about features, technologies and strategies known from Oracle, and how they are (or aren’t) in MySQL. And vice versa, but less. Participants came from all over Germany, plus Denmark and Switzerland. End users, consultants, technocrats, “boys” who go ahead and fail, and “girls” who test and succeed…

I greatly enjoyed the open format – listening, talking, drawing, discussing, swaggering, ignoring, pushing, pulling – the full repertoire. :)

From the technological aspect, it was great to learn something about MySQL – how consistent reads, clustering, and lots of other stuff works, that we never ever thought that it could be done different from the way the Oracle Database works. And that MyISAM isn’t the norm, but just another PITA. :) Go for InnoDB. What is MariaDB? And what the fork is Percona Server?


Oli swiss-talks about MySQL.

Read more…

Martin Klier in Interview: Oracle Standard Edition

A while ago, interviewed me about Oracle’s Standard Edition and database system migrations. The material was published just recently, so I’d like to share it. Enjoy, and if there are questions, just let me know!


I have to add a corrigenda: SE RAC is not – at least not at the moment – limited to a number of nodes. It’s currently limited to CPU sockets, to be exact, 4 of them. So a four-node SE RAC is possible, if I did not completely misunderstand the licencing policies.

Disclaimer: Licensing and pricing here are my OPINIONS, and not a reliable source to make decisions or confront Oracle with. :) If you need some tailored licensing information, feel free to email for advice.


DOAG 2014 Presentation and Whitepaper online: Database I/O


my #DOAG2014 presentation and whitepaper are online now!

“Oracle Core für Einsteiger: Datenbank I/O”





Thank you all for attending!

Martin Klier

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