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(Just a small heads-up: I don't blog as much as I used to, I nowadays update my Google+ page a lot more frequently. You might want to subscribe that if you are interested in more frequent technical updates on what we are working on.) In the past weeks we have been working on a couple of features for systemd that enable a number of new usecases I'd like to shed some light on. Taking benefit of the
This is no time for procrastination, here is already the twentieth installment of my ongoing series on systemd for Administrators: Socket Activated Internet Services and OS Containers Socket Activation is an important feature of systemd. When we first announced systemd we already tried to make the point how great socket activation is for increasing parallelization and robustness of socket services
Since we first proposed systemd for inclusion in the distributions it has been frequently discussed in many forums, mailing lists and conferences. In these discussions one can often hear certain myths about systemd, that are repeated over and over again, but certainly don't gain any truth by constant repetition. Let's take the time to debunk a few of them: Myth: systemd is monolithic. If you build
Here's the tenth installment of my ongoing series on systemd for Administrators: Instantiated Services Most services on Linux/Unix are singleton services: there's usually only one instance of Syslog, Postfix, or Apache running on a specific system at the same time. On the other hand some select services may run in multiple instances on the same host. For example, an Internet service like the Dovec
systemd not only brings improvements for administrators and users, it also brings a (small) number of new APIs with it. In this blog story (which might become the first of a series) I hope to shed some light on one of the most important new APIs in systemd: Socket Activation In the original blog story about systemd I tried to explain why socket activation is a wonderful technology to spawn service
systemd is still a young project, but it is not a baby anymore. The initial announcement I posted precisely a year ago. Since then most of the big distributions have decided to adopt it in one way or another, many smaller distributions have already switched. The first big distribution with systemd by default will be Fedora 15, due end of May. It is expected that the others will follow the lead a b
Here's the third installment of my ongoing series about systemd for administrators. How Do I Convert A SysV Init Script Into A systemd Service File? Traditionally, Unix and Linux services (daemons) are started via SysV init scripts. These are Bourne Shell scripts, usually residing in a directory such as /etc/rc.d/init.d/ which when called with one of a few standardized arguments (verbs) such as st
Here's the second installment of my ongoing series about systemd for administrators. Which Service Owns Which Processes? On most Linux systems the number of processes that are running by default is substantial. Knowing which process does what and where it belongs to becomes increasingly difficult. Some services even maintain a couple of worker processes which clutter the "ps" output with many addi
As many of you know, systemd is the new Fedora init system, starting with F14, and it is also on its way to being adopted in a number of other distributions as well (for example, OpenSUSE). For administrators systemd provides a variety of new features and changes and enhances the administrative process substantially. This blog story is the first part of a series of articles I plan to post roughly
Here's yet another installment of my ongoing series on systemd for Administrators: The Blame Game Fedora 15[1] is the first Fedora release to sport systemd. Our primary goal for F15 was to get everything integrated and working well. One focus for Fedora 16 will be to further polish and speed up what we have in the distribution now. To prepare for this cycle we have implemented a few tools (which a
If you are well connected or good at reading between the lines you might already know what this blog post is about. But even then you may find this story interesting. So grab a cup of coffee, sit down, and read what's coming. This blog story is long, so even though I can only recommend reading the long story, here's the one sentence summary: we are experimenting with a new init system and it is fu
At the Audio MC at the Linux Plumbers Conference one thing became very clear: it is very difficult for programmers to figure out which audio API to use for which purpose and which API not to use when doing audio programming on Linux. So here's my try to guide you through this jungle: What do you want to do? I want to write a media-player-like application! Use GStreamer! (Unless your focus is only
Finally, secure real-time scheduling on the Linux desktop can be become a reality. Linux 2.6.25 gained Real-Time Group Scheduling, a feature which allows to limit the amount of CPU time real-time processes and threads may consume. Traditionally on Linux real-time scheduling was limited to priviliged processes, because RT processes can lock up the machine if they enter a busy loop. Scheduling is ef
Version 0.1 released, initial realease Overview mod_dnssd is an Apache HTTPD module which adds Zeroconf support via DNS-SD using Avahi. Status Version 0.6 is more or less stable and fulfills its purpose. Documentation For activating mod_dnssd just load it into the server and use the global directive DNSSDEnable to enable it: DNSSDEnable on That's it, nothing more is required! The module publishes
Copyright 2004-2007 Lennart Poettering <mzaffzqaf (at) 0pointer (dot) de> License News Overview Current Status Documentation Requirements Installation Acknowledgements Download License This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at
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