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Scripting, Part Two: Looping for Fun and Profit
Crafty System Administrators who want to conserve energy need to learn the fine art of looping.
A Little (q)bit of Quantum Computing
Recent news has put quantum computing into the spotlight. Is quantum computing almost here?
Extended File Attributes Rock!
Worldwide, data is growing at a tremendous rate. However, one recent study has pointed out that the size of files is not necessarily growing at the same rate; meaning the number of files is growing rapidly. How do we manage all of this data and files? While the answer to that question is complex, one place we can start is with Extended File Attributes.
Checksumming Files to Find Bit-Rot
In a previous article extended file attributes were presented. These are additional bits of metadata that are tied to the file and can be used in a variety of ways. One of these ways is to add checksums to the file so that corrupted data can be detected. Let's take a look at how we can do this including some simple Python examples.
Command Line Magic: Scripting, Part One
Creating shell scripts is the lazy (smart) system administrator's way to automate and build intelligence into repetitive tasks.
What’s an inode?
As you might have noticed, we love talking about file systems. In these discussions the term "inode" is often thrown about. But what is an inode and how does it relate to a file system? Glad you asked.
Making the Evolutionary Leap from Meerkat to Narwhal
If you're using Maverick Meerkat (Ubuntu 10.10) or an older distribution, Natty Narwhat is a whole new animal.
SandForce 1222 SSD Testing, Part 5: Detailed Throughput and IOPS Analysis with a 2.6.38.2 Kernel
In this series we've been working over the 2.6.32 kernel, which is a bit old. Let's kick the tires on a 2.6.38.2 kernel to see if it helps or hurts performance of the SandForce SSD.
Emailing HPC
Email is not unlike MPI. The similarities may help non-geeks understand parallel computers a little better.
FAUMachine: First Impressions
If you'd like to try a new twist on virtualization, FAUmachine might be the next cool thing.
iotop: Per Process I/O Usage
Based on a reader comment, we take iotop for a spin to see if it can be used for monitoring the IO usage of individual processes on a system. The result? It has some interesting capability that we haven't found in other tools.
FBCMD: Command Line for Facebook
What's better than the command line and Facebook? How about combining the two?
SandForce 1222 SSD Testing, Part 4: Detailed IOPS Analysis
In this installment of our series examining the performance of SandForce-based consumer SSDs we dig into the IOPS performance of the drive. How does it stand up to an enterprise-class SSD? Let's find out.
Say Cheese, Webcam Effects Demo
Video effects walkthru of the desktop webcam application, Cheese. With commentary.
SandForce 1222 SSD Testing, Part 3: Detailed Throughput Analysis
Our last two articles have presented an initial performance examination of a consumer SandForce based SSD from a throughput and IOPS perspective. In this article we dive deeper into the throughput performance of the drive, along with a comparison to an Intel X-25E SSD. I think you will be surprised at what is discovered.
Putting Drupal to Work
Drupal is a simple but powerful CMS. However, you'll probably want to configure it. Learn how to tweak Drupal's settings to your liking.
SandForce 1222 SSD Testing – Part 2: Initial IOPS Results
SandForce has developed a very interesting and unique SSD controller that uses real-time data compression. This affects data throughput and SSD longevity. In this article, we perform an initial examination of the IOPS performance of a SandForce 1222-based SSD. The results can be pretty amazing.
Drupal at Warp Speed
Need to setup Drupal CMS but don't have the time to learn how? Try this 30 minute quick start guide.
Chasing The Number
The Top500 list is a valuable measure of HPC progress, but the race it has spawned maybe over for many organizations
Stick a Fork in Flock: Why it Failed
This probably won't come as a surprise to many, but the "social Web browser" has thrown in the towel. Don't cry for the Flock team - they're flying the coop for Zynga to go make Facebook games or something. But Flock's loyal fans are out in the cold. Why'd Flock fail? There's a few lessons to be learned.