Constantine Murenin offered a history of the OpenBSD hardware sensors framework during his talk at BSDCan 2008, describing how it was originally based on a port from NetBSD, then evolved and was eventually ported to all the BSDs. He also discussed his own involvement with the framework, having ported it from OpenBSD to FreeBSD as a Summer of Code project, and how his port was merged into DragonFly BSD. At the end of the talk, there were some interesting ecxhanges between Constantine and Poul-Henning Kamp, the latter explaining why he'd had the code backed out of FreeBSD and why he continues to oppose it being merged back in.
Leslie Hawthorn, a Program Manager in Google's Open Source team, gave a talk at BSDCAN 2008 on Google's ongoing Summer of Code project. She started by explaining what the open source team does, including enforcing license compliance, hosting over 700,000 open source projects with Google Code, academic research, funding open source development, and community outreach including the sponsorship of conferences such as BSDCan. She went on to discuss how she got started running the project after its initial launch in 2005.
Having sponsored four summer of code's now, Leslie noted that Google has had over 1,500 "graduates" and over 2,000 mentors involved, coming from over 98 countries and working with over 175 open source projects. By the end of the currently in progress 2008 Summer of Code, the project will have provided over 10 million US dollars in funding, generating over 6 million lines of code.
Randall Stewart of Cisco Systems gave a talk titled SCTP, what it is and how to use it, discussing the Stream Control Transmission Protocol (SCTP). A paper that was displayed on the overhead projecter before the talk began summarized:
"Integrated into FreeBSD 7.0 -- first standardized by the Internet Engineering Task force (IETF) in October of 2000, in RFC 2960 and later updated by RFC 4960. SCTP is a message oriented protocol providing reliable end to end communication between two peers in an IP network."
Randall explained that SCTP is an alternative protocol to TCP, UDP. To describe SCTP, he suggested you start with TCP features, including: reliable retransmission, congestion control, flow control, connection oriented, and selective acknowledgements. You then add to it more features, including: "association" 4-way handshake, framing and ordered service, multistreaming, multihoming, and reachability.
Pawel Dawidek first ported ZFS to FreeBSD from OpenSolaris in April of 2007. He continues to actively port new ZFS features from OpenSolaris, and focuses on improving overall ZFS stability. During the introduction to his talk at BSDCan, he explained that his goal was to offer an accessible view of ZFS internals. His discussion was broken into three sections, a review of the layers ZFS is built from and how they work together, a look at unique features found in ZFS and how they work internally, and a report on the current status of ZFS in FreeBSD.
The BSDCan website notes that Pawel is a FreeBSD committer, adding:
"In the FreeBSD project, he works mostly in the storage subsystems area (GEOM, file systems), security (disk encryption, opencrypto framework, IPsec, jails), but his code is also in many other parts of the system. Pawel currently lives in Warsaw, Poland, running his small company."
BSDCan 2008 officially started this morning at 9AM with an opening talk by the event's organizer, Dan Langille. However, in reality the event has already been running for two days, with the FreeBSD tutorials having started on the 14'th. After arriving in Ottawa yesterday afternoon and finding my room in a 20 story University of Ottawa residence, I wandered down to the Royal Oak Pub for early registration, meeting several dozen BSD hackers from all over the world.
This morning's opening talk was well attended, filling up first with clusters of laptop users around the power outlets along both walls. By 15 minutes after the hour, the room was completely full, and Dan started with a humorous slideshow of example letters he's been receiving ever since posting the words "letter of invitation" somewhere on the BSDCan website two year back. Coming primarily from Nigeria, the letter's authors often claim to represent large groups of developers, yet always coming from "disposable" email addresses. After some laughs, he launched into his opening keynote.
KernelTrap is excited to be able to offer live coverage of this year's BSDCan 2008 in Ottawa, Canada on May 16th and 17th. The two day conference takes place at the University of Ottawa, and was organized for the fifth consecutive year by Dan Langille who has also made it possible for me to attend and cover the event on KernelTrap. I spoke with Dan to get some background information on the conference, and learn about some of the upcoming highlights.
The event's webpage explains:
"BSDCan, a BSD conference held in Ottawa, Canada, has quickly established itself as the technical conference for people working on and with 4.4BSD based operating systems and related projects. The organizers have found a fantastic formula that appeals to a wide range of people from extreme novices to advanced developers."