Sinh hoat CLB tin hoc Komaba lan 1 - Phat bieu cua Hung

Open Source Evolution
Nguyen Vu Hung
Tokyo 2007/06/24

FOSS definition
FOSS examples
FOSS processes
FOSS technologies
FOSS quality
FOSS architecture
FOSS business models
Further readings
Outline

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.”

FOSS Examples
GCC ( GNU C compiler )‏
Linux ( Operating System )‏
Eclipse ( de facto IDE )‏
KDE ( Desktop Environment )‏
Apache / PHP / MySQL
Firefox ( Web browser )‏

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”

Fast exploitation
Share/try new ideas.
Community help testing.
New topics
Basically anything new.
Community is important.
Modeling feedback control system(?)‏
Technology

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. “

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.

Distribution model
New services = $$$
Packaging.
Technical supports.
Customization.
Refactoring.
Business Model Test tree vs. production tree? ( RH )‏

Modeling feedback control system.
Social aspects.
Economical aspects.
Further readings

Thank you. Q & A

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

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