Current_Issue.tar.gz - All Your Blades Are Belong To Us
I often say geeks rule the world, and we could take over if we wanted to—we just have better things to do with our time. This issue, we explore that notion and show Linus we're well on our way to world domination. I could go on and on, but I think regular folk might get scared if they realized the degree of access we have to information—mwahahahaa. Putting aside my aspirations to be a modern-day Lex Luthor, this month, we talk about infrastructure. Let's face it, Linux rules the roost when it comes to infrastructure. Heck, even a large percentage of Windows servers are really just virtual machines running on top of a Linux hypervisor.
Bill Childers gets us going with that very topic. If you're planning to virtualize much of your existing server room, picking a hypervisor can be the hardest step. Bill compares and contrasts VMware Server, VirtualBox and KVM. In my own server room, I have only one Windows server, and the fact that it runs on top of a Linux hypervisor makes me smile. Bill doesn't stop there, however; he also argues again this month with Kyle Rankin. Kyle seems to think XFS is the best filesystem to use, while Bill is convinced ext3 is still king. I try to stay out of their little spats, but their discussion is enlightening to read.
Every server room needs storage. For many of us, that's just a few hard drives in a RAID array. As needs grow, however, single-server storage solutions don't scale that well—enter SAN. Usually, that means lots of money to an already expensive infrastructure, but Michael Nugent shows us how to create a Linux-based SAN for a fraction of the cost. Along with the need for large storage solutions, comes the need for redundancy. We also have an article on IPv4 Anycast, where Philip Martin explains how to add availability for mission-critical services. (Anyone that has experienced the “network hang” of a downed DNS server will appreciate the notion of high availability!)
Infrastructure extends outside our precious server closets though, and sits on our desks, in our backpacks and even our pockets. When traveling from location to location, changing networks can be frustrating. Abhinav Pathak, Andrei Gurtov and Miika Komu show us a bit about Host Identity Protocol for Linux and how we can keep our identity no matter where we go. In a similar vein, Joshua Kramer demonstrates the Advanced Message Queueing Protocol, which allows applications to communicate with each other regardless of location. Even if you are telecommuting from the “clouds”, it's important to be connected. A good infrastructure knows no geographical limits—which brings us to an interview I conducted this month....
Linus may be happy with Linux dominating the world, but quite frankly, some people have bigger goals in mind. The IBM InfoSphere Streams Project aims a bit higher, and using Linux as its underlying base, it gathers information about space weather. The amount of data is so great, it has to be analyzed in real time. I like the sound of “Interplanetary Domination” quite a bit, so Mitch Frazier and I took the bull by the horns and interviewed the folks at IBM. I enjoyed the interview; hopefully, you will too.
What about our regular cast of columnists? They're all here this month too. Reuven M. Lerner continues telling us about RSpec, Dave Taylor shows us how to manage latitude and longitude from inside a shell script, and Mick Bauer describes the ultimate conference for hackers, DEFCON. Speaking of hackers, Kyle Rankin tries to explain why arrow keys have no place in our lives as Linux users and strives to turn us all into die-hard vim users. I'm already mostly with him, but I'll admit I use arrow keys. I guess that makes me a n00b.
So although your coffeepot might not be running a Linux kernel and your dishwasher doesn't instant message you when the cleaning cycle is complete, that time is coming sooner than you think. What will our intergalactic infrastructure be based on? My guess is Linux. This month, you can get a jump start on that transition and perhaps have a say on whether your refrigerator will have an ext3 or XFS filesystem—at least, that's what Bill and Kyle are hoping for.
Shawn Powers is the Associate Editor for Linux Journal. He's also the Gadget Guy for LinuxJournal.com, and he has an interesting collection of vintage Garfield coffee mugs. Don't let his silly hairdo fool you, he's a pretty ordinary guy and can be reached via e-mail at email@example.com. Or, swing by the #linuxjournal IRC channel on Freenode.net.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
Free to Linux Journal readers.Register Now!
- SUSE LLC's SUSE Manager
- My +1 Sword of Productivity
- Managing Linux Using Puppet
- Non-Linux FOSS: Caffeine!
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Doing for User Space What We Did for Kernel Space
- SuperTuxKart 0.9.2 Released
- Google's SwiftShader Released
- Parsing an RSS News Feed with a Bash Script
- SourceClear Open
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide