2015-04: btrfs
Chris Irwin presents btrfs. See kwlug.org/node/956 for additional information, slides and other auxiliary materials. Note that there was lots of animated discussion during this presentation, which the microphone did not pick up very well. Video uploaded by Gheorghe Curelet-Balan.
Part 1: https://www.youtube.com/watch?v=Gp-jmtor7NQ
Part 2: https://www.youtube.com/watch?v=fY0DfY4j9-s
Part 3: https://www.youtube.com/watch?v=ZTdgN4_vPlg