DragonFlyBSD Multimedia Resources List
Links on this page refer to multimedia resources (podcast, vodcast,
audio recordings, video recordings, photos) related to DragonFlyBSD or
of interest for DragonFlyBSD users.
This list is available as chronological
overview, as a tag cloud and
via the sources.
This list is also available as RSS feed
If you know any resources not listed here, or notice any dead links,
please send details to
Edwin Groothuis so that
it can be included or updated.
Tag: html
EuroBSDCon 2007 Papers
Source: EuroBSDCon
Added: 05 October 2007
Tags: eurobsdcon, eurobsdcon2007, papers
Pawel Jakub - FreeBSD/ZFS - last word in operating/file systems (337 Kb), Stephen Borrill - Building products with NetBSD - thin-clients (407 Kb), John P Hartmann - CMS Pipelines Explained (118 Kb), Soren Straarup - An ARM from shoulder to hand (307 Kb), Brooks Davis - Building clusters with FreeBSD (2.2 Mb), Steven Murdoch - Hot or Not: Fingerprinting hosts through clock skew (6.1 Mb), Brooks Davis - Using FreeBSD to Promote Open Source Development Methods (989 Kb), Sam Leffler - Long Distance Wireless (for Emerging Regions) (19 Mb), Antti Kantee - ReFUSE: Userspace FUSE Reimplementation Using puffs (102 Kb), Yvan VanHullebus - NETASQ and BSD: a success story (2.4 Mb), Ryan Bickhart - Transparent TCP-to-SCTP Translation Shim Layer (692 Kb), Pierre Yves Ritschard - Load Balancing (23 Kb), John P Hartmann - Real Men's Pipes - When UNIX meets the mainframe mindset (382 Kb), Claudio Jeker - Routing on OpenBSD (1.3 Mb), Marc Balmer - Supporting Radio Clocks in OpenBSD (304 Kb), Peter Hansteen - Firewalling with OpenBSD's PF packet filter (531 Kb), Simon L Nielsen - The FreeBSD Security Officer function (251 Kb), Robert Watson - FreeBSD Advanced Security Features (152 Kb), Ryan Bickhart - Transparent TCP-to-SCTP Translation Shim Layer (491 Kb), Kirk Mckusick - A Brief History of the BSD Fast Filesystem (145 Kb), George Neville-Neil - Network Protocol Testing in FreeBSD and in General (251 Kb), Sam Smith - Fighting "Technical fires" (1.4 Mb), Marko Zec - Network stack virtualization for FreeBSD 7.0 (401 Kb), Isaac Levy - FreeBSD jail(8) Overview, the Secure Virtual Server (120 Mb)
EuroBSDCon 2007 Papers
A Tale of Four Kernels
Source: Diomidis Spinellis
Added: 17 May 2008
Tags: freebsd, linux, solaris, windows, article, kernel, diomidis spinellis
Diomidis Spinellis. A tale of four kernels.
In Wilhem Schfer, Matthew B. Dwyer, and
Volker Gruhn, editors, ICSE '08: Proceedings
of the 30th International Conference on
Software Engineering, pages 381-390, New
York, May 2008. Association for Computing
Machinery.
,
Diomidis Spinellis. A tale of four kernels.
In Wilhem Schfer, Matthew B. Dwyer, and
Volker Gruhn, editors, ICSE '08: Proceedings
of the 30th International Conference on
Software Engineering, pages 381-390, New
York, May 2008. Association for Computing
Machinery.
The FreeBSD, GNU/Linux, Solaris, and Windows operating
systems have kernels that provide comparable
facilities. Interestingly, their code bases share
almost no common parts, while their development
processes vary dramatically. We analyze the source
code of the four systems by collecting metrics in
the areas of file organization, code structure,
code style, the use of the C preprocessor, and data
organization. The aggregate results indicate that
across various areas and many different metrics,
four systems developed using wildly different
processes score comparably. This allows us to posit
that the structure and internal quality attributes
of a working, non-trivial software artifact will
represent first and foremost the engineering
requirements of its construction, with the influence
of process being marginal, if any.
Global software development in the FreeBSD project
Source: Diomidis Spinellis
Added: 24 January 2007
Tags: freebsd, article, global software development, domidis spinellis
In NASSCOM Quality Summit 2006: Setting benchmarks in global outsourcing, Bangalore, India, September 2006. National Association of Software and Services Companies (NASSCOM)., International Workshop on Global Software Development for the Practitioner, pages 73-79. ACM Press, May 2006, Linux Format, (11):60?63, September/October 2006. In Greek.
FreeBSD is a sophisticated operating system developed
and maintained as open-source software by a team
of more than 350 individuals located throughout the
world. This study uses developer location data, the
configuration management repository, and records
from the issue database to examine the extent of
global development and its effect on productivity,
quality, and developer cooperation. The key findings
are that global development allows round-the-clock
work, but there are some marked differences between
the type of work performed at different regions.
The effects of multiple dispersed developers on the
quality of code and productivity are negligible.
Mentoring appears to be sometimes associated with
developers living closer together, but ad-hoc
cooperation seems to work fine across continents.
New York City BSD Con 2008
Source: New York City *BSD User Group
Added: 24 November 2008
Tags: nycbsdcon2008, nycbsdcon, presentation
Julio M. Merino Vidal: An introduction to the Automated Testing Framework (ATF) for NetBSD. (570 Kb, 18 pages), Mike Silbersack: Detecting TCP regressions with tcpdiff. (88 Kb, 28 pages), Metthew Dillon: The HAMMER File System. (820 Kb, 16 pages), Kurt Miller: OpenBSD's Position Independent Executables (PIE) Implementation. (21 pages), Adrian Chadd: High-throughput concurrent disk IO in FreeBSD. (197 Kb, 92 pages), Anders Magnusson: Design and Implementation of the Portable C Compiler. (123 Kb, 29 pages), Jason L Wright: When Hardware Is Wrong, or "They can Fix It In Software". (1.7 Mb, 22 pages)
Slides of presentations given at New York City BSD
Conference 2008.
Joerg Sonnenberger - Journaling FFS with WAPBL
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, netbsd, wapbl, ffs, joerg sonnenberger
Slides (10 Kb, 24 pages)
Journaling FFS with WAPBL
NetBSD 5 is the first NetBSD release with a journaling
filesystem. This lecture introduces the structure
of the Fast File System, the modifications for WAPBL
and specific constraints of the implementation.
The Fast File System (FFS) has been used in the BSD
land for more than two decades. The original
implementation offered two operational modes:
- safe and slow (sync)
- unsafe and fast (async) One decade ago, Kirk
McKusick introduced the soft dependency mechanism
to offset the performance impact without risk of
mortal peril on the first crash. With the advent
of Terabyte hard disks, the need for a file system
check (fsck) after a crash becomes finally unacceptable.
Even a background fsck like supported on FreeBSD
consumes lots of CPU time and IO bandwidth.
Based on a donation from Wasabi Systems, Write Ahead
Physical Block Logging (WAPBL) provides journaling
for FFS with similar or better performance than
soft dependencies during normal operation. Recovery
time after crashes depends on the amount of outstanding
IO operations and normally takes a few seconds.
This lecture gives a short overview of FFS and the
consistency constraints for meta data updates. It
introduces the WAPBL changes, both in terms of the
on-disk format and the implementation in NetBSD.
Finally the implementation is compared to the design
of comparable file systems and specific issues of
and plans for the current implementation are
discussed.
Peter Hansteen - Building the Network You Need with PF, the OpenBSD packet filter
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, tutorial, pf, openbsd, peter hansteen
Slides (2.5 Mb, 68 pages)
Building the Network You Need with PF, the OpenBSD
packet filter.
Building the network you need is the central theme
for any network admin. This tutorial is for aspiring
or seasoned network professionals with at least a
basic knowledge of networking in general and TCP/IP
particular. The session aims at teaching tools and
techniques to make sure you build your network to
work the way it's supposed to, keeping you in charge.
Central to the toolbox is the OpenBSD PF packet
filter, supplemented with tools that interact with
it. Whether you are a greybeard looking for ways
to optimize your setups or a greenhorn just starting
out, this session will give you valuable insight
into the inner life of your network and provide
pointers to how to use that knowledge to build the
network you need. The session will also offer some
fresh information on changes introduced in OpenBSD
4.5, the most recent version of PF and OpenBSD. The
tutorial is loosely based on Hansteen's recent book,
/The Book of PF/ (No Starch Press), with updates
and adaptations based on developments since the
book's publication date.
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