Our old friend Robert Love, whose popular Kernel Korner column long graced these pages, has updated his classic book Linux Kernel Development to a new 3rd edition. Published by Addison-Wesley, this work details the design and implementation of the Linux kernel, presenting the content in a manner that is beneficial for those writing and developing kernel code, as well as for programmers seeking to better understand the operating system and become more efficient and productive in their coding. The book details the kernel's major subsystems and features, including its design, implementation and interfaces. It covers the Linux kernel with both a practical and theoretical eye, which is intended to appeal to readers with a variety of interests and needs. Updated content includes an all-new chapter on kernel data structures, details on interrupt handlers and bottom halves, extended coverage of virtual memory and memory allocation and more.
Hosting service providers may want to read on about the new LVE Wrappers from CloudLinux, tools that let the server owner control the exact CPU usage for individual users and applications. LVE Wrappers are based on CloudLinux's Lightweight Virtual Environment technology that allows administrators to control CPU usage on a server at the tenant or application level. It does so by isolating specific hardware resources in a lightweight container and prevents one tenant on a shared server from affecting others. LVE Wrappers, which start individual applications and dæmons inside LVE environments, allow for control of resources for each application, which allows for greater flexibility and stability on the overall server infrastructure. The software is available to all CloudLinux subscribers.
Authors Tony Mullen and Claudio Andaur have set out to prove that the amazing open-source 3-D animation software Blender isn't just for hobbying anymore. Their new book Blender Studio Projects: Digital Movie-Making, now out from Sybex, shows readers how to do on Blender what one typically has done with high-end (and high-priced) apps Maya and 3ds Max. Sybex bills the book as “a real-world, roll-up-your-sleeves guide that plunges straight into step-by-step instructions designed to help you build skills and create solid assets for film, video and games.” The companion DVD includes starter, intermediate and final files, as well as movie files to help you every step of the way.
Managing ERP apps can require the patience of Job, which is why CAST Software released its new Analysis and Measurement Software for SAP, Siebel and PeopleSoft. The product's mission is to bring consistent and objective measurement of these platforms and eliminate costly customization errors in critical business applications. CAST's own studies of ERP installations showed a large percentage of issues that normally go undetected in functional testing and result in serious performance, stability and maintainability problems. For instance, 80% of database interactions in ERP installs are handled improperly, leading to significant business disruption. Environments like SAP, Siebel and PeopleSoft, says CAST, require a deceptively high level of customization. Because manual measurement of quality is expensive and time consuming, automation is useful for exposing flaws that cause applications to perform erratically.
James Gray is Products Editor for Linux Journal.
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!
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- Doing for User Space What We Did for Kernel Space
- Tech Tip: Really Simple HTTP Server with Python
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- Rogue Wave Software's Zend Server
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