From the Editor - Got a Linux Server? Thank a Beowulf.
In May 1965, IBM Chairman T. J. Watson, Jr., wrote of large scientific computers, “at some point between two and three years ago it became evident that the fallout from the building of such large-scale machines was so great as to justify their continuance at almost any cost” (on Dr Mark Smotherman's site at www.cs.clemson.edu/~mark/acs.html). That doesn't mean that high-performance computing (HPC) startups have an easy time entering the enterprise market. From Control Data to Thinking Machines, history shows that if you concentrate on winning in HPC, you don't get the skills to cross over to regular business customers.
But ten years after the first Beowulf, examples of what Watson called fallout are everywhere on the Linux scene. From smoking out bad power supplies to fixing device drivers to making manageability work for the PC architecture, HPC customers are ruthless in demanding tweaks to turn a rack of off-the-shelf stuff from a maintenance nightmare to an asset. For an IT vendor, an HPC program can work like an automaker's racing program to test cutting-edge ideas and get everyone fired up to win bragging rights.
Early Linux clusters were labor-intensive, with “crash carts” including keyboard and monitor for BIOS access. Today, LinuxBIOS makes the pit crew's work feasible for more and more machines per administrator. See Bernard Li's article on how to take advantage of years of cluster experience from some of the biggest, most innovative Linux supercomputing sites (page 52).
And, forget about manageability for a while—let's talk performance issues. Paul Terry, Amar Shan and Pentti Huttunen might have just sped up many people's work by a whole lot. Check out their scheduler performance numbers on page 68 and prepare for more efficient work on your parallel jobs.
Leigh Orf has some great imagery of thunderstorms, rendered just for this issue, and the software behind them is something you can download and hack yourself. Get some ideas about scientific visualization on page 62, and send us some images.
This issue isn't all clusters—Andres Benitez and Vicente Gonzales show how they turned inexpensive non-networked air conditioners into a money-saving system for a classroom building (page 44). And Nick Moffitt, whose spam-fighting articles have been a hit on the Linux Journal Web site, is here with an introduction to a new, flexible revision control system (page 90).
Whether you're putting together a cluster or enjoying the benefits of Beowulf-driven improvements in hardware, Linux and related tools, have a great time experimenting with all the amazing technology and cool projects in this issue.
Don Marti is editor in chief of Linux Journal.
Getting Started with DevOps - Including New Data on IT Performance from Puppet Labs 2015 State of DevOps Report
August 27, 2015
12:00 PM CDT
DevOps represents a profound change from the way most IT departments have traditionally worked: from siloed teams and high-anxiety releases to everyone collaborating on uneventful and more frequent releases of higher-quality code. It doesn't matter how large or small an organization is, or even whether it's historically slow moving or risk averse — there are ways to adopt DevOps sanely, and get measurable results in just weeks.
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|Secure Server Deployments in Hostile Territory, Part II||Jul 29, 2015|
|Hacking a Safe with Bash||Jul 28, 2015|
|KDE Reveals Plasma Mobile||Jul 28, 2015|
|Huge Package Overhaul for Debian and Ubuntu||Jul 23, 2015|
|diff -u: What's New in Kernel Development||Jul 22, 2015|
|Shashlik - a Tasty New Android Simulator||Jul 21, 2015|
- Secure Server Deployments in Hostile Territory, Part II
- Hacking a Safe with Bash
- KDE Reveals Plasma Mobile
- Huge Package Overhaul for Debian and Ubuntu
- Home Automation with Raspberry Pi
- The Controversy Behind Canonical's Intellectual Property Policy
- Shashlik - a Tasty New Android Simulator
- Embed Linux in Monitoring and Control Systems
- diff -u: What's New in Kernel Development
- General Relativity in Python