FreeBSD Multimedia
FreeBSD Multimedia Resources List
Links on this page refer to multimedia resources (podcast, vodcast, audio recordings, video recordings, photos) related to FreeBSD or of interest for FreeBSD users.
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Tag: geom
GEOM - in Infrastructure We Trust, Pawel Jakub Dawidek, AsiaBSDCon 2008
GEOM - in Infrastructure We Trust, Pawel Jakub Dawidek, AsiaBSDCon 2008 clive URL: http://www.youtube.com/watch?v=xMpmOezBJZo
Source: YouTube bsdconferences channel
Added: 21 February 2009
Tags: youtube, presentation, asiabsdcon2008, asiabsdcon, geom, pawel jakub dawidek
Flash (46:38)
AsiaBSDCon 2008 Paper List
Papers of the AsiaBSDCon 2007
Source: AsiaBSDCon
Added: 08 April 2008
Tags: asiabsdcon, asiabsdcon2008
Using FreeBSD to Promote Open Source Development Methods, Brooks Davis, Michael AuYeung, Mark Thomas (The Aerospace Corporation) (483 Kb), OpenBSD Network Stack Internals, Claudio Jeker (The OpenBSD Project) (410 Kb), Tracking FreeBSD in a Commercial Setting, M. Warner Losh (Cisco Systems, Inc.) (94 Kb), Send and Receive of File System Protocols: Userspace Approach With puffs, Antti Kantee (Helsinki University of Technology, Finland) (126 Kb), GEOM --- in Infrastructure We Trust, Pawel Jakub Dawidek (The FreeBSD Project) (91 Kb), Reducing Lock Contention in a Multi-Core System, Randall Stewart (Cisco Systems, Inc.) (72 Kb), PC-BSD: FreeBSD on the Desktop, Matt Olander (iXsystems) (6.4 Mb), Logical Resource Isolation in the NetBSD Kernel, Kristaps Dzonsons (Centre for Parallel Computing, Swedish Royal Institute of Technology) (97 Kb), Whole of the proceedings (9.3 Mb), Gaols: Implementing Jails Under the kauth Framework, Christoph Badura (The NetBSD Foundation) (92 Kb), Cover page (467 Kb), Sleeping Beauty --- NetBSD on Modern Laptops, Jorg Sonnenberger, Jared D. McNeill (The NetBSD Foundation) (87 Kb), A Portable iSCSI Initiator, Alistair Crooks (The NetBSD Foundation) (341 Kb), BSD implementations of XCAST6, Yuji IMAI, Takahiro KUROSAWA, Koichi SUZUKI, Eiichi MURAMOTO, Katsuomi HAMAJIMA, Hajimu UMEMOTO, and Nobuo KAWAGUTI (XCAST fan club, Japan) (526 Kb)
Luigi Rizzo - GEOM based disk schedulers for FreeBSD
GEOM based disk schedulers for FreeBSD The high cost of seek operations makes the throughput of disk devices very sensitive to the offered workload. A disk scheduler can then help reorder requests to improve the overall throughput of the device, or improve the service guarantees for individual users, or both. Research results in recent years have introduced, and proven the effectiveness of, a technique called "anticipatory scheduling". The basic idea behind this technique is that, in some cases, requests that cause a seek should not be served immediately; instead, the scheduler should wait for a short period of time in case other requests arrive that do not require a seek to be served. With many common workloads, dominated by sequential synchronous requests, the potential loss of throughput caused by the disk idling times is more than balanced by the overall reduction of seeks. While a fair amount of research on disk scheduling has been conducted on FreeBSD, the results were never integrated in the OS, perhaps because the various prototype implementations were very device-specific and operated within the device drivers. Ironically, anticipatory schedulers are instead a standard part of Linux kernels. This talk has two major contributions: First, we will show how, thanks to the flexibility of the GEOM architecture, an anticipatory disk scheduling framework has been implemented in FreeBSD with little or no modification to a GENERIC kernel. While these schedulers operate slightly above the layer where one would naturally put a scheduler, they can still achieve substantial performance improvements over the standard disk scheduler; in particular, even the simplest anticipatory schedulers can prevent the complete trashing of the disk performance that often occurs in presence of multiple processes accessing the disk. Secondly, we will discuss how the basic anticipatory scheduling technique can be used not only to improve the overall throughput of the disk, but also to give service guarantees to individual disk clients, a feature that is extremely important in practice e.g., when serving applications with pseudo-real-time constraints such as audio or video streaming ones. A prototype implementation of the scheduler that will be covered in the presentation is available at http://info.iet.unipi.it/~luigi/FreeBSD/
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, geom, disk schedulers, luigi rzzo
Slides (430 Kb, 40 pages)