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October 2015

New Python Pass the Pigs Game

So in honor of coaching a Python introduction class with Devoxx4Kids this weekend, I thought I would update my pass the pigs game and add in the scoring and just rewrite it a little.

If you aren’t familiar with this fun little game, here’s the gist-  It consists of two pigs that you roll like dice.  Depending on how the pigs land, you get a particular score-

Delphix Express: refreshing a virtual database with source data

What if I’m a developer or QA person using a copy of production database to do my work. What if my copy of production is now out of date and I want to refresh my data with the data as it is on production.

Below is a video of how to refresh a virtual database to the freshest data from the source database:

This example uses the free version of Delphix called “Delphix Express” and  “Landshark” demo environment consisting of two VMs a source VM with a source database and a target VM with no database originally where we provision a virtual database.

Direct path and buffered reads again.

Since the direct path feature for serial processes was discovered after it became available in Oracle 11.2.0.1 (as far as I know, I haven’t checked Oracle 11.1), there have been a lot of blog posts on when this happens. A lot of these do not specify the Oracle version, which is a failure in my opinion. There are different decisions made in different versions.

The purpose of this blogpost is to show the results of my tests on when the Oracle database engine switches from buffered to direct path reads and vice versa. There probably are decisions made by the database engine for this feature based on internal kept statistics, like general activity and object usage, which means my tests might be different in your database. For that purpose I included an anonymous PL/SQL block in this post so you can replay the same test in your own database, except for the table, which you have to create yourself.

Copy Data Management for Oracle Database with EMC AppSync and XtremIO

This is a quick blog entry to invite readers to view this little demonstration video I created. The topic is Copy Data Management in an Oracle Database environment. We all know the pains involved with the number of database copies needed in today’s Oracle environment. Well, how about technology with these characteristics:

Using DevOps Jetpack (a.k.a. Jet Stream)

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photo by Chase Elliott Clark


Here a video on using Jetstream which I like to call “DevOps Jetpack for Developers” (Remember you can get Delphix Express and Jet Stream for free.) See previous blog post on how to set up Jet Stream.

Little things worth knowing: automatic generation of extended statistics in 12c

When you are migrating to Oracle 12c I hope you might this post useful. I came across this feature when researching what’s new with Oracle 12c (and yes I still find lots of new ones I haven’t noticed before). This one is a bit hidden away in section 2.2.4.3 Automatic Column Group Detection of the 12c New Features Guide. And it’s a lot more complex than I first thought! In this first post I’ll try and show the generation of extended statistics in 12c. I am planning on another post to explain how the rest of the adaptive optimisations that are new with 12c fit into the picture.

What is the motivation?

Oracle Open World and Oak Table World Schedule!

So I’ll be heading out for Oracle Open World 2015 in just over another week.

DevOps Jetpack for Developers: Jetstream Setup

Delphix has a developer self service interface called “Jetstream.”  I like to call it the “DevOps Jetpack” for developers.

Jetstream is available both in the Delphix enterprise engine and also in the free Delphix Express engine.

See following blog post on users using Jet Stream.

Here is a video on how to setup Jetstream for two users, a developer (Joe Dev)  and a QA analyst (Jane QA). In a blog post to follow this one, we will see how Joe Dev and Jane QA can work together thanks to Jetstream which allows them to share versions of data (similar to how people can share versions of code with source control).

Extracting information from Airbrake, directly from inside the database

In this article, I will describe how we can select project information and deployment information from Airbrake, from inside the database. We want to do this, because later on in these demos, we want to build an automated job, that track errors in relation to code releases inside the database.

OOW 2015: my presentation

I don’t have an official OOW presentation in the conference this year. However, I am presenting a session at the Oak Table World 2015 event behind held concurrently with OOW 2015. My topic is “Exadata Database Machine Security” and I plan to review some of the newest updates to security for the Exadata Database Machine engineered system.

As the website indicates, the event is completely free and there is no pre-registration or enrollment required–just show up and come on in to hear some great speakers present on great topics. Hope to see you there on Monday, October 26, 2015!