X-Git-Url: https://gitweb.dragonflybsd.org/ikiwiki.git/blobdiff_plain/b2f9f25417d12df4b2f3c8e5a7b1934ccb87903c..HEAD:/index.mdwn diff --git a/index.mdwn b/index.mdwn index 4a105ec5..87a5ca1c 100644 --- a/index.mdwn +++ b/index.mdwn @@ -1,33 +1,51 @@ -## Ongoing DragonFly News +## DragonFly 6.4.0 released -### 2.6.3 Released, 07-May-2010! +DragonFly version 6.4.0 is released. The 6.4 series has hardware support for type-2 hypervisors with NVMM, an amdgpu driver, the experimental ability to remote-mount HAMMER2 volumes, and many other changes. -The [[DragonFly 2.6.3 release|release26]] is now available! This release features our -new swapcache, a tmpfs port, fast-fsync for HAMMER, improved random I/O, and numerous -other goodies. 2.6.2 features a major bug fix to a HAMMER issue related to reblocking -full filesystems, and 2.6.3 is a stabilization pass which primarily fixes a kernel panic -related to sendfile() and works around a few pkgsrc issues. +The details of all commits between the 6.2 and 6.4 releases are available in the associated commit messages. -DragonFly had a very successful Google [Summer of Code](http://socghop.appspot.com/) for 2010, with all projects being completed successfully! Consult the [Summer of Code 2010](/docs/developer/gsoc2010/) page for a list of projects and links. +Go to the [6.4 release page](release64) page for details on the release, and [[download]] via one of the [[mirrors]].
-Recent news from the DragonFly Digest +See recent news from the DragonFly Digest -The DragonFly Digest is also on Tumblr and Twitter. +
+Recent CI build reports +
+ + ## What is DragonFly BSD? -At a fundamental level, DragonFly belongs to the same class of operating systems as other BSD-derived systems and Linux. It is based on the same UNIX ideals and APIs and shares ancestor code with other BSD operating systems. DragonFly is providing an opportunity for the BSD base to grow in an entirely different direction from the one taken in the FreeBSD, NetBSD, and OpenBSD series. +DragonFly belongs to the same class of operating systems as other BSD-derived systems and Linux. It is based on the same UNIX ideals and APIs and shares ancestor code with other BSD operating systems. DragonFly provides an opportunity for the BSD base to grow in an entirely different direction from the one taken in the FreeBSD, NetBSD, and OpenBSD series. + +DragonFly includes many useful features that differentiate it from other operating systems in the same class. + +The most prominent one is HAMMER2, our modern high performance filesystem with instant (and mount-writable) snapshots, compression, and de-duplication. + +Virtual kernels provide the ability to run a full-blown kernel as a user process for the purpose of managing resources or for accelerated kernel development and debugging. + +The kernel uses several synchronization and locking mechanisms for SMP. Much of the work done since the project began has been in this area. A combination of intentional simplification of certain classes of locks to make more expansive subsystems less prone to deadlocks, and the rewriting of nearly all the original codebase using algorithms designed specifically with SMP in mind, has resulted in an extremely stable, high-performance kernel that is capable of efficiently using all cpu, memory, and I/O resources thrown at it. + +DragonFlyBSD has virtually no bottlenecks or lock contention in-kernel. Nearly all operations are able to run concurrently on any number of cpus. Over the years, the VFS support infrastructure (namecache, vnode cache), user support infrastructure (uid, gid, process groups, sessions), process and threading infrastructure, storage subsystems, networking, user and kernel memory allocation and management, process fork, exec, and exit/teardown, time keeping, and all other aspects of kernel design have been rewritten with extreme SMP performance as a goal. + +DragonFly is uniquely positioned to take advantage of the wide availability of affordable Solid Storage Devices (SSDs), by making use of swap space to cache filesystem data and meta-data. This feature, commonly referred to as "swapcache", can give a significant boost to both server and workstation workloads, with a very minor hardware investment. + +The DragonFly storage stack comprises robust, natively written AHCI and NVME drivers, stable device names via DEVFS and a partial implementation of Device Mapper for reliable volume management and encryption. + +Some other features that are especially useful to system administrators are a performant and scalable TMPFS implementation, an extremely efficient NULLFS that requires no internal replication of directory or file vnodes, our natively written DNTPD (ntp client) which uses full-bore line intercept and standard deviation summation for highly-accurate timekeeping, and DMA, designed to provide low-overhead email services for system operators who do not need more expansive mail services such as postfix or sendmail. -DragonFly includes many useful features that differentiate it from other operating systems in the same class, some of these features are: HAMMER, a modern high performance filesystem with historical access properties. Virtual kernel's, the ability to run a full-blown kernel as a user process for the purpose of managing resources, security or kernel development and debugging. The token synchronization mechanism is inherently deadlock-free, decreases complexity and cross-subsystem pollution, this makes the kernel more maintainable as well as more reliable and performant. Swapcache allows you to make use of swap space to cache filesystem data and meta-data. Paired with a solid state disk device, this feature enables both server and workstation workloads to perform as if they have access to significantly more RAM. Some other features that make DragonFly an administrative pleasure are variant symlinks that are resolved at runtime based on user-specific or system-wide variables. Serial device numbering through devfs greatly simplifies storage management. A scalable and fast TMPFS implementation that is made even more viable by swapcache. The NULLFS implementation in DragonFly allows for arbitrary mount points and has virtually no overhead. A major crux of any open source operating system is third party applications. DragonFly leverages the pkgsrc system to provide thousands of applications in source and binary forms. These features and the host of other niceties that DragonFly provides make it an extremely modern, useful, configurable and friendly UNIX-like operating system. +A major crux of any open source operating system is third party applications. DragonFly leverages the dports system to provide thousands of applications in source and binary forms. These features and more band together to make DragonFly a modern, useful, friendly and familiar UNIX-like operating system. -The DragonFly BSD community is comprised of users and developers that take pride in an operating system that maintains challenging goals and ideals. This community has no reservation about cutting ties with legacy when it makes sense, preferring a pragmatic, no-nonsense approach to development of the system. The community also takes pride in its openness and innovative spirit, applying patience liberally and always trying to find a means to meet or exceed the performance of our competitors while maintaining our trademark algorithmic simplicity. +The DragonFly BSD community is made up of users and developers that take pride in an operating system that maintains challenging goals and ideals. This community has no reservation about cutting ties with legacy when it makes sense, preferring a pragmatic, no-nonsense approach to development of the system. The community also takes pride in its openness and innovative spirit, applying patience liberally and always trying to find a means to meet or exceed the performance of our competitors while maintaining our trademark algorithmic simplicity. For more information, visit the [[Features|features]] and [[History|History]] pages. -## Now Hiring +## Participation -DragonFly provides a welcoming environment for those looking to participate in open source. See the [[Projects|/docs/developer/ProjectsPage]], [[Research Projects|/docs/developer/ResearchProjectsPage]], [[Code Bounties|/docs/developer/Code_Bounties]] and [[Summer of Code Projects|/docs/developer/GSoCProjectsPage]] pages for project ideas. If you are looking for an easy way to get your feet wet, you might find something suitable in the [Bug Tracker](http://bugs.dragonflybsd.org/). Or bring up your own idea on the appropriate [[mailing list|mailinglists]] or IRC! +DragonFly provides a welcoming environment for those looking to participate in open source. See the [[Projects|/docs/developer/ProjectsPage]], [[Research Projects|/docs/developer/ResearchProjectsPage]], and [[Code Bounties|/docs/developer/Code_Bounties]] pages for project ideas. If you are looking for an easy way to get your feet wet, you might find something suitable in the [Bug Tracker](http://bugs.dragonflybsd.org/). Or bring up your own idea on the appropriate [[mailing list or IRC|mailinglists]]!