Posts Categorized: Technical Blog

Oracle Big Data Appliance – What’s Cooking?

Many analysts are suggesting that a big data appliance will be announced at this OOW. Based on published Oracle OpenWorld focus sessions on oracle.com (PDF documents), the following technologies will most likely be the key — Hadoop, NoSQL, Hadoop data loader for Oracle, R Language. Want more details — you have to wait for them.

Rounding Errors in MYSQL with DECIMAL Type

It seems to be assumed that fixed-point values, DECIMAL and NUMERIC, in MySQL are not susceptible to rounding errors because they are exact numeric data types. It must be kept it mind, that there are limits in precision, and the maximum number of digits for DECIMAL is 65. What I am discussing here is rounding error.

Needles and Pins

Sometimes clients ask us to implement scripts that change objects in their schemes. In order to prevent the situation when these scripts hung just because some, or several, objects are pinned. Here are two simple procedures that can help to check what we will get during our maintenance.

Database Appliance for the Masses

I’m an experienced Oracle DBA, I have lots of Linux experience and scores of RAC installations under my belt. I also work for one of the best and more experienced RAC teams in the world. So when a customer asked how long it will take to install 2-node RAC, we answered “2 hours”. It took over 30 hours…

Comparing Oracle Database Appliance and Exadata

Oracle Database Appliance (ODA) is in many ways similar to an Exadata quarter rack: they both use two similar compute servers in an engineered system configuration, with shared storage and flash storage. But in other ways, especially networking and storage, they differ significantly.

Oracle Database Appliance — What Does It Mean for You and Your Business?

When I first heard about Oracle Database Appliance and what it does, I got really excited — I saw great potential in this product. When we got our hands dirty and started testing the appliance, I become confident that this product will be a hit. This article is targeted at system architects and managers to explain what they get, and don’t get, with Oracle Database Appliances.

Thanks Tony and Barbara for the Opportunity to Present for AUSOUG Victoria members!

I was in Melbourne presenting two of my papers for Australian Oracle User Group Victorian members. I received a very warm welcome in that beautiful city. it was my pleasure to meet several Oracle DBAs and present for AUSOUG members. 25 people took part in the meeting! I should say that it was one of the best audiences I have presented for over the last few months! I received several good questions and we have a very good follow up discussion.

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