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Open.source.innovation.20070624

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  • 1. Open Source Evolution Nguyen Vu Hung Tokyo 2007/06/24
  • 2. Outline • FOSS definition • FOSS examples • FOSS processes • FOSS technologies • FOSS quality • FOSS architecture • FOSS business models • Further readings
  • 3. FOSS Definition FOSS: Free and Open Source Software. “free software” = liberty, not price. Freedom to: • Run the program. • Study, adapt. Source code is a must. “Open source is a development method for software that harnesses • Redistribute/Copy. the power of distributed peer review and transparency of process.” • Improve/Release improvements.
  • 4. FOSS Examples • GCC ( GNU C compiler ) • Linux ( Operating System ) • Eclipse ( de facto IDE ) • KDE ( Desktop Environment ) • Apache/PHP/MySQL • Firefox ( Web browser )
  • 5. Process • Global collaboration – Members all over the world. – Developers = users = testers. • Distributed change management – Use branches in CVS. – Share-development. • Iterative development – Short dev cycle. “User satisfaction can – Unstable releases. improve and be driven – Decentralized testing. by shortening the time – Remote quality assurance. interval between releases”
  • 6. Technology • Fast exploitation – Share/try new ideas. – Community help testing. • New topics – Basically anything new. – Community is important. Modeling feedback control system(?)
  • 7. Quality • Source code availability: – Fast/effective defect-correction cycle Fast feedback by users = developers = testers. “The promise of open source is – High security assurance betterflexibility, lowerreliability, an more quality, higher cost, and • White testing end to predatory vendor lock-in. “ • Code review • Free testers “Given enough eyeballs, all bugs are shallow.”
  • 8. Architecture • Evolutionary ( hackerish? ) because software change too fast. designs – No design at all. – Read the code! No doco. • Modularized components – Mozilla extensions. – Linux kernel modules. – Eclipse plug-ins. Reduce software complexity. Encourage developers.
  • 9. Business Model • Distribution model • New services = $$$ – Packaging. – Technical supports. – Customization. – Refactoring. Test tree vs. production tree? ( RH )
  • 10. Further readings • Modeling feedback control system. • Social aspects. • Economical aspects.
  • 11. Thank you. Q&A
  • 12. Ref • The Free Software Definition http://www.gnu.org/philosophy/free-sw.html • http://opensource.org/ • Christof Ebert, Open Source Drives Innovation • Nazim H. Madhavji et al, SOFTWARE EVOLUTION AND FEEDBACK