What is DragonFly BSD?

最新推荐文章于 2024-11-07 16:29:56 发布

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#resources #system #freebsd #namespaces #concurrency #internet

DragonFlyBSD是一款源自FreeBSD的操作系统，其目标在于重新设计并发、SMP和其他内核子系统的实现方式。它属于与BSD和Linux同一类别的操作系统，继承了UNIX的理念和API。该项目从2003年开始，专注于重写主要内核子系统以支持第二阶段的目标：在内核中提供通用的集群支持。

What is DragonFly BSD?

DragonFly is an operating system and environment originally based on FreeBSD. DragonFly branched from FreeBSD in 2003 in order to develop a radically different approach to concurrency, SMP, and most other kernel subsystems.

DragonFly belongs to the same class of operating system as BSD and Linux and is based on the same UNIX ideals and APIs. DragonFly gives the BSD base an opportunity to grow in an entirely different direction from the one taken in the FreeBSD, NetBSD, and OpenBSD series.

From 2003 to early 2007 the DragonFly project focused on rewriting most of the major kernel subsystems in order to support the second phase of the project. This involved a great deal of work in nearly every subsystem, particularly the filsystem APIs and kernel core. During all of this we have managed to keep the system up-to-date with regards to the third party applications and base system utilities that are needed to make any system usable in production. We have also adopted the PkgSrc system for management of all non-base-system third-party applications in order to pool our resources with other BSD projects using the system.

The second phase of the project is now upon us. The DragonFly project's ultimate goal is to provide generic clustering support natively in the kernel. This involves the creation of a sophisticated cache management framework for filesystem namespaces, file spaces, and VM spaces, which allows heavily interactive programs to run across multiple machines with cache coherency fully guarenteed in all respects. This also involves being able to chop up resources, including the cpu by way of a controlled VM context, for safe assignment to unsecured third-party clusters over the internet (though the security of such clusters itself might be in doubt, the first and most important thing is for systems donating resources to not be made vulnerable through their donation).