Scott Dowdle's blog

Anonymous Comments OFF for Now

I got tired of having to delete about 100 bogus comments from anonymous users every day. Anonymous comments were moderated so none of the spammy ones would get posted so it was a total waste of time to post them in the first place... but bots don't seem to learn.

In any event, I hate having to sign up for an account just to leave a comment on a site... so an alternative is to just email me your anonymous comments along with the URL that they refer to - I'll give it a week and see how it turns out. I am NOT a fan of captcha so I don't want to burden all users with that either.

Site registrations have been turned back ON but registration requirements will be enforced.

Video: Ubuntu 11.10 Review

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For our Ubuntu fans as well as those who just want to learn about the upcoming release, I found this on youtube. I was hoping for HTML5 playback option, but this seems to be Flash only. The review was done from a recent release candidate that I believe will be the final release due out this Thursday. I still prefer KDE myself. :)

Video: Red Hat on CNBC's Mad Money

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I'm not much of a fan of Jim Kramer... but here's the video.

Flash is the best I could do. Sorry for the small size and internal branding/ads.

Videos: KVM Forum 2011 Presentations

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The KVM Forum 2011 was held at the Hyatt Regency in Vancouver, Canada on August 15-16. It was co-located with LinuxCon North America 2011.

LinuxCon and the KVM Forum were both sponsored by The Linux Foundation who recorded a large number of videos from both events. Unfortunately, The Linux Foundation had few security breaches to deal with on their and domains which (I'm guessing) has greatly delayed them doing post-production work on the recordings and posting them publicly.

I found that Red Hat had recently posted a handful of the KVM Forum videos to YouTube but since they were only available in the flv and mp4 formats, I decided to re-encode them and post them to as webm (a free, open source, non-patent encumbered video format). I think is really a better place for them. Red Hat released them under a Creative Commons, Attribution - No Derivative Works 3.0 License. I have not altered the videos in any way other than re-encoding them to webm in a smaller resolution (624x352) and bitrate (664Kbit) making them one half to one third of the original filesize yet maintaining reasonable quality. Modern Firefox, Google Chrome, and Opera browsers can play webm as can stand-alone players like VLC, Totem, and mplayer.

They are all highly technical presentations for those interested in the nitty-gritty details of the Linux KVM virtualization Hypervisor. I have embedded the first, short keynote video below and given download URLs for the rest. Thanks to Red Hat for posting them!

One thing to note is that the camera / recording is statically positioned and does not show the presenter slides so I have also included the links to the slide decks in PDF format. For a better understanding, you are strongly encouraged to look at the slides while watching the videos. Also be warned that some presenters may occasionally use curse words.

Here's a zip file containing all slide decks in PDF format for all of the presentations.

Alexander Graf - AHCI Doing Storage right 105 MB / PDF
Allen Kay, Intel - Intel Graphics Virtualization on KVM 57.3 MB / PDF
Alon Levy, Red Hat - SPICE Roadmap 88.9 MB / PDF
Andrew Theurer, IBM - Improving the Out-of-box Performance When Using KVM 210.9 MB / PDF
Anthony Liguori, IBM Linux Technology Center - Keynote Address Day 2 43.1 MB / PDF
Anthony Liguori, IBM Technology Center - Code Generation for Fun and Profit 128.7 MB / PDF
Asias He, Beihang University - Native Linux KVM tool 113.1 MB / PDF
Avi Kivity, Red Hat - Keynote Address, Day 1 36.9 MB / PDF
Avi Kivity, Red Hat - Performance Monitoring for KVM Guests 148.4 MB / PDF
Bryan Cantrill, VP Engineering, Joyent - Experiences Porting KVM to SmartOS 199.1 MB / PDF
Conrad Wood, ProfitBricks - Geographically distributed HPC Clouds using KVM 119.8 MB / PDF
Dan Kenigsberg, Red Hat - VDSM is now Free 145.2 MB / PDF
Daniel Berrange, Red Hat - Introduction to libvirt APIs for KVM 160.5 MB / PDF
Gerd Hoffmann, Red Hat - Fixing the USB disaster 148.4 MB / PDF
Jagane Sundar - Livebackup - Full and Incremental Disk Backups of Running VMs 136.2 MB / PDF
Jan Kiszka, Siemens AG - Using KVM as a Real-Time Hypervisor 132.6 MB / PDF
Kevin Wolf, Red Hat - The Reinvention of qcow2 148.1 MB / PDF
Lucas Meneghel Rodrigues, Red Hat - Making KVM autotest useful for KVM developers 152.1 MB / PDF
Marcelo Tosatti, Red Hat - QEMU: live block copy 72.4 MB / PDF
Mark Wagner, Red Hat - KVM Performance Improvements and Optimizations 107.3 MB / PDF
Markus Armbruster, Red Hat - QEMU's device model qdev 59.1 MB / PDF
Michael S. Tsirkin, Red Hat - Virtio Networking Status Update 86.2 MB / ODP
Paul Lu, University of Alberta - Low-Latency, High-Bandwidth Use Cases for Nahanni/ivshmem 149.5 MB / PDF
Paul Mackerras, IBM LTC Ozlabs - KVM on the IBM POWER7 Processor 164.5 MB / PDF
Ricardo M. Matinata, IBM Linux Technology Center - Implementing a Hardware Appliance 188.4 MB / PDF
Rik van Riel, Red Hat - Guest Memory Overcommit: Free page hinting & more 106.0 MB / PDF
Ryan Harper, IBM Linux Technology Center - Keep a Limit On It: IO Throttling in QEMU 89.7 MB / PDF
Stefan Hajnoczi, IBM & Paolo Bonzini, Red Hat - Virtio SCSI: An alternative virtualized storage stack for KVM 142.2 MB / PDF
Stuart Yoder, Freescale Semiconductor - KVM on Embedded Power Architecture Platforms 125.6 MB / PDF
Yoshi Tamura, Midokura - Network Virtualization 101.3 MB / PDF


Video: Default to Open

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Red Hat produced a video entitled Default to Open: The History of Open Source and Red Hat. Since it is about history, it has a number of older clips... bits and pieces I've seen before but quite a bit of new stuff too. Enjoy it embedded in webm format or use the link below to download it for local playback.

Default_to_Open.webm (~27 min, 121 MB)
Right-click, Save target as...

Review: SanDisk Sansa Fuze

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Sansa FuzeSansa FuzeThis is the second Sansa product I have bought. The first one was the Clip that served me well for a few years until it died. In need of a new device I saw the refreshed product line from SanDisk that includes the Fuze+, the Clip+ and Clip Zip. For hardware I'm usually a very late adopter. For software, being a Fedora user, not so much.

I tend to buy stuff for myself from the discount computer sellers online like, and I had a $25 credit from so I decided to check out what they had and found a refurbished black 4GB Fuze model for $28.88. They also had a Fuze+ model but it was about twice that... so I opted for the Fuze.

Video: 20th Anniversary of Linux Gallery Tour

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The Linux Foundation has put together a 20th Anniversary of Linux Gallery with a timeline and a lot of donated items from various companies and members of the Linux community. As luck would have it, I ripped this from youtube so I could repost it in webm format and noticed that in the original the metadata for the audio stream said - creation_time : 1970-01-01 00:00:00. While that isn't quite true for Linux, which was started in 1991, it is basically the Epoch time considered to be the start of the UNIX universe. :)

If you can't play it in your browser, you can download it here:
20th_Anniversary_of_Linux_Gallery_Tour.webm (29 MB, ~6 min)

Video: Greg Kroah-Hartman and Linus Torvalds

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Greg and Linus sat down for an open discussion about Linux and its 20th anniversary. They even take questions from the audience. This is from the LinuxCon Japan 2011 held in early June. They had a very similar discussion in August at LinuxCon North America but the video for that hasn't been released yet. Having seen both, I think this first one actually covers more stuff. Unfortunately the introducer takes a few minutes before we get to see Linus and Greg. In webm format.

If you can't view it in your browser or would like to download it, here's the link:
20_Years_of_Linux-Linus_and_Greg.webm (170 MB, ~51 min)

Video: Linux Kernel Report - 20 Years Old Edition

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Jon Corbet did another of his Linux Kernel talks at the LinuxCon Japan 2011 in early June. This is his Linux 20th Anniversary edition where he goes into a lot of the history of Linux so this talk is a bit different than his previous ones. Here it is in webm format.

Can't play it in your browser or want to download it? Get it here:
linux-kernel-report-age-20.webm (166 MB, ~50 min)

Audio: When Patent Trolls Attack


NPR's This American Life did a feature entitled, "When Patent Trolls Attack" and it is something I think all technology folks should listen to so I embedded it below. Sorry for the limited media format choice provided.

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