Links from 2012-01-22
An update on RDF concepts and some ontologiesResource Description Framework (RDF) is the standard framework for the Semantic Web and a recommended framework for the Linked Data movement. This article details the most recent updates to and implications of the RDF concept specification. It also covers some new ontology specifications such as data cataloging vocabularies and RDF database mapping systems.
Scheduling in HadoopHadoop implements the ability for pluggable schedulers that assign resources to jobs. However, as we know from traditional scheduling, not all algorithms are the same, and efficiency is workload and cluster dependent. Get to know Hadoop scheduling, and explore two of the algorithms available today: fair scheduling and capacity scheduling. Also, learn how these algorithms are tuned and in what scenarios they’re relevant.
Managing VLANs on mission-critical shared Ethernet adaptersShared Ethernet adapters (SEAs) can be used for IEEE 802.1Q VLAN tagging. However, once the SEA is in use, you cannot make changes to the VLANs on the trunk virtual Ethernet adapter without stopping the SEA. By using separate virtual adapters for each tagged VLAN, you can attach a new virtual adapter with its new VLAN to the SEA without any downtime. Retiring a VLAN from the SEA can be just as easy with a modular approach: one tagged VLAN per virtual adapter.
Using Trust Association Interceptors with WebSphere Application Server to support OAuth tokensAre you looking to share access of your protected resources by becoming an OAuth service provider? This article describes how you can use IBM® WebSphere® Application Server (V7.0 and later) with Trust Association Interceptors (TAI) to accept OAuth tokens for authorizing calls from applications or web sites (consumer) to protected resources. TAIs make it possible to support OAuth alongside other token services, such as LTPA, while meeting WS-Security restrictions.
64-bit versus 32-bit JVM: Understanding performance implications for WebSphere Commerce sitesStarting with Version 7 Fix Pack 1, IBM® WebSphere® Commerce supports a 64-bit Java™ Virtual Machine (JVM). This article discusses the costs and benefits of using a 64-bit JVM for WebSphere Commerce deployments, a typical memory utilization, and performance characteristics. When to switch and what to consider when moving to a 64-bit JVM is also discussed.
Firewall uptime and security with iptablesIptables is the standard Linux® firewall application. It is easy to configure and maintain while powerful enough to provide the control expected from a high-end appliance. Learn how to get started with iptables, recover from common issues, and simulate a small-office usage scenario.
Implement secure SSH access to IBM CloudUnderstand how to upgrade, choose, and implement a highly effective, secure SSH connectivity solution to the IBM® Cloud by examining some recent trends underlying the migration of enterprise-level, remote computing to the cloud. Look at key areas to consider when making the shift from in-house handling of key processes to a cloud-based solution. Explore an existing end-to-end, server and client SSH security solution and see how it addresses real world regulatory requirements.
Running with TripwireThe open source Tripwire® is a file integrity checker package that has been around for years and, though I have used it many times on Linux® distributions, I have only recently got around to using it on AIX®. This is mainly due to the following: * It is troublesome to compile using the gcc AIX version. * I prefer using the AIX built-in audit service. However, as there is now a Tripwire rpm for AIX, I use it for some of our AIX boxes. Tripwire does not provide a complete solution to intruder detection based on file changes, but coupled with running an AIX audit, it provides a firm security policy. Tripwire monitors for changes to files and directories on your system via the objects that you provide in the main policy file.
Learn Linux, 302 (Mixed environments): Performance tuningIn preparation for taking the Linux Professional Institute Certification exam LPI-302 for systems administrators, learn how to measure Samba performance and make Samba work faster.
Achieve cross-browser functionality with HTML5 and CSS3HTML5 and CSS3 have many great new features, like the ability to store data offline and create round corners without graphics. However, not all of these new features work across browsers. Learn specific HTML5 and CSS3 techniques that work on all of the latest versions of the major browsers, including Safari, Internet Explorer, Firefox, and Chrome.
HTML5 fundamentals, Part 1: Getting your feet wetHTML5 reflects the monumental changes in the way you now do business on the web and in the cloud. This article is the first in a four-part series designed to spotlight changes in HTML5, beginning with the new tags and page organization and providing high-level information on web page design, the creation of forms, the use and value of the APIs, and the creative possibilities that Canvas provides.
Lazy Linux: 10 essential tricks for adminsLearn these 10 tricks and you’ll be the most powerful Linux® systems administrator in the universe…well, maybe not the universe, but you will need these tips to play in the big leagues. Learn about SSH tunnels, VNC, password recovery, console spying, and more. Examples accompany each trick, so you can duplicate them on your own systems.
Linux for Window systems administrators, Part 1: Managing and monitoring the extended file systemWindows and Linux use different file system architectures. Fortunately, your Windows experience can put you on the fast track to being comfortable managing and monitoring the Linux extended file systems. This article helps you learn your way around the extended disk file system family on Linux.
Tagged as: delicious, links | Author: Martin Leyrer
[Sonntag, 20120122, 04:05 | permanent link | 0 Kommentar(e)
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