Open.source.innovation.20070624
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This document discusses open source software. It provides definitions of FOSS and examples like Linux, Eclipse, and Firefox. It describes FOSS processes as global collaboration with short development cycles and decentralized testing. FOSS technologies benefit from source code availability and community involvement that can improve quality. Architectures are evolutionary and modular to reduce complexity. Business models provide services around packaging, support and customization of FOSS software.
Open.source.innovation.20070624
- 1. Open Source Evolution Nguyen Vu Hung Tokyo 2007/06/24
- 2. FOSS definition FOSS examples FOSS processes FOSS technologies FOSS quality FOSS architecture FOSS business models Further readings Outline
- 3. FOSS: Free and Open Source Software. “ free software” = liberty, not price. Freedom to: Run the program. Study, adapt . Source code is a must. Redistribute/Copy . Improve/Release improvements. FOSS Definition “ Open source is a development method for software that harnesses the power of distributed peer review and transparency of process.”
- 4. FOSS Examples GCC ( GNU C compiler ) Linux ( Operating System ) Eclipse ( de facto IDE ) KDE ( Desktop Environment ) Apache / PHP / MySQL Firefox ( Web browser )
- 5. Global collaboration Members all over the world. Developers = users = testers. Distributed change management Use branches in CVS. Share-development. Iterative development Short dev cycle. Unstable releases. Decentralized testing. Remote quality assurance. Process “ User satisfaction can improve and be driven by shortening the time interval between releases”
- 6. Fast exploitation Share/try new ideas. Community help testing. New topics Basically anything new. Community is important. Modeling feedback control system(?) Technology
- 7. Source code availability: Fast/effective defect-correction cycle Fast feedback by users = developers = testers. High security assurance White testing Code review Free testers Quality “ Given enough eyeballs, all bugs are shallow.” “ The promise of open source is better quality, higher reliability, more flexibility, lower cost, and an end to predatory vendor lock-in. “
- 8. Evolutionary ( hackerish? ) designs No design at all. Read the code! No doco. Modularized components Mozilla extensions. Linux kernel modules. Eclipse plug-ins. Architecture Reduce software complexity. Encourage developers. because software change too fast.
- 9. Distribution model New services = $$$ Packaging. Technical supports. Customization. Refactoring. Business Model Test tree vs. production tree? ( RH )
- 10. Modeling feedback control system. Social aspects. Economical aspects. Further readings
- 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
Editor's Notes
- #6: Windows: 2 years ( traditional ) Debian: 1 year ( traditional ) Oracle: 1 year MySQL: 4 weeks Eclipse: 6 weeks Fedora: 3-6 months Shared dev : cvs Shared knowledge: know bugs/fixes are in cvs -> dig it to share -> knowledge bases.
- #7: Developers try/share new ideas, implementation, algorithms, new process Having a community is the motivation of developers. Feedback control system: a system is better if it has feedback. Multi level
- #8: Fast/effective defect-correction cycle: both quality and security. Users/testers find bugs -> developers fix. Findbugs: jlint: find bug prone code and bug itself.