The first post to this blog was made on September 14th, 2007. Since then, seven years have gone by, I have moved twice, changed jobs as many times, gotten married and become a father, and embarked on a bachelor’s degree. The blog has gone from being hosted on Blogger to being hosted on WordPress, and I have moved it from a subdomain to the primary domain where you find it now.
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ETL at a glance
Business Intelligence, at its core, is about taking data from different sources, compiling the data into a format that can be used, and running reports on that data. The process of compiling the data is called extract, transform load; ETL for short. If you are going to work with Business Intelligence, you need to have, at the very least, a rudimentary understanding of ETL. Here’s a quick overview:
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Starting out with OBIEE
Here it is. The reason I chose Oracle Linux over all the other distros out there. Over Debian-based Ubuntu, with which I am somewhat familiar, and over Fedora-based Red Hat, which is commonly used in enterprise environments. The reason I chose Oracle Linux, is that I want to learn more about Oracle Business Intelligence Enterprise Edition, OBIEE.
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One important difference between Debian and Fedora
Before starting out with Oracle Linux this summer, my experience with Linux had been more or less confined to Ubuntu, which stems from Debian. Oracle Linux, on the other hand, stems from the Fedora project and Red Hat. Though they both build on the same kernel, they diverge from each other in a few important aspects. Software available in the repositories for Debian are divided into free, non-free and contrib. All software available in Fedora’s repositories are free.
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Oracle Linux: Unable to connect to FTP server in terminal
In order to keep the virtual harddrive on my VM as small as possible, I prefer keeping installers on a network share that I can connect to through FTP. The terminal command for connecting to FTP servers handily enough is ftp. When running that command, terminal returned “Command not found”. It turns out that FTP is not installed on Oracle Linux by default.
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Oracle Linux: Unable to connect to the internet
When first installing Oracle Linux, you may run into being unable to connect to the internet. You may make the mistake of thinking that the problem is with the network settings on the host-side, and try to futz about changing what type of network connection the VM connects to. Don’t bother, it isn’t going to do any good, and you will only get annoyed.
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The Cloud Storage Price War is upon us
Back in March, Google announced that they were massively slashing the storage prices for their customers. Previously $4.99/month for 100 GB, and $49.99/month for 1 TB, they cut the prices to $1.99 and $9.99, respectively. Beyond that, they are charging $99.99 per 10 TB, meaning that 40 TB will set you back $399.96. Now, in and of itself, that is interesting, but when compared to the pricing of competitiors, it gets downright impressive.
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Run Control Panel applets with elevated permissions
Sometimes, you want to launch a Control Panel applet with elevated permissions. Normally, you would right-click the program you want, and select to run as an administrator. However, the control panel applets don’t give you that option, and so we need to go deeper.
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Force uninstall when installer is unavailable
Imagine the scene; you are having a problem with a program, and the manufacturer tells you that the solution is a complete uninstall followed by a reinstall. You go to uninstall, and Windows tells you that it can’t find the installer. Looking around, nor can you. So, now you’re up a certain waterway without a certain rowing implement, aren’t you? Not necessarily.
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Tesla: All our patents are belong to you
In a move that is at once impressive and baffling to many commentators, Tesla Motors CEO Elon Musk recently announced that they are applying the open source philosophy to their portfolio of patents. While a great publicity stunt, there seems to be more to it than that. Musk said: (more…)