Nemo translated (in Italian, of course) an interesting comparison between the most diffused filesystems on Linux (and not only on The Penguin): Ext2/3, Reiserfs 3, XFS, JFS. The original article was posted by hansivers on the Debian Administration Website. Conclusion? XFS rulez!!! And I’m on the same: I start to use XFS average 2 years ago… and some big partitions on my HD still demonstrate optimal performance. Good Job, SGI!
The 2.6 Linux Kernel included selectable IO schedulers. IO Schedulers control the way the kernel commits reads and writes to disks - the intention of providing different schedulers is to allow better optimsation for different classes of workload. Without an IO scheduler, the kernel would basically just issue each request to disk in the order that it received them. This could result in massive thrashing of the disk subsystem - if one process was reading from one part of the disk, and one writing to another, it would have to seek back and forth across the disk for every operation. The schedulers main goal is to optimise disk access times. An IO scheduler can use the following techniques to improve performance: Request merging The scheduler merges adjacent requests together to reduce disk seeking Elevator The scheduler orders requests based on their physical location on the block device, and it basically tries to seek in one direction as much as possible. Prioritisation The scheduler has complete control over how it prioritises requests, and can do so in a number of ways All IO schedulers should also take into account resource starvation, to ensure requests eventually do get serviced!… ...
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Take a look at the ext2 (second extended file system), ext3 (third extended file system), and Reiser4 file systems and discover how to create your own Reiser4 file system. The most commonly used file system, ext2, is a traditional UNIX®-style file system that doesn’t mix well with modern hard drive sizes. The ext3 file system adds journalling, but not much else. If you want something really advanced, you might want to check out the current Reiser4 file system. ...
Treviño segnala a OSSBlog, e noi riprendiamo felicemente che è stata finita la traduzione completa della guida italiana ad Ubuntu Breezy. ...
Operating Systems based on Micro-Kernel seems to return fashionable, and some experimental OS releases demonstrate it: the National ICT of Australia, infact, has released a Darwin porting for L4. This is for being able to study the behaviour of that class of o.s.. This porting include XNU, the hearth of MacOSX. ...
krugle/the search engine/ for developers/ findcode/findanswers/krugle makes it easy for developers to find source code and technical information—fast!… I subscribe the beta-testing program of this new, powerfull search engine for developers. Yesterday an email advertise me that a very interesting screencast is available, to explain the target and the features of this engine. Other than the features, the heavy usage of Ajax is very beautiful. But “bando alle ciance”: see the screencast here.
«Track your blog!» Wp-SlimStat is a statistic plugin for WordPress. ...
Welcome to eyeOS, a web based desktop system. With eyeOS you can access your data and your applications anywhere, anytime. A virtual office in your hands, no need to install anything in the computer. Everything lives in the browser, for you and your work colleagues. eyeOS is open source and free software. Set up freely an account on our servers or, if you prefer it, install it in your server. Make your life easier with the virtual word processor, calendar, file manager, messenger, browser and other applications. And if you want more applications, just visit the eyeOS Application Database! ...
Red Hat, finally, opens its Knowledgebase: Red Hat Knowledgebase is a library of tips, troubleshooting advice, and current information updated daily by Red Hat technicians. A “sink without bottom” (translation of the italian meaning-full expression “pozzo senza fondo”) of sources, knowledge, solutions about Linux. Source, OSSBlog.