Why didn't it work?
   

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 = 15 = 
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 33 
     




  • 
Development is now flowing through the sub-maintainers


    

    • 
Both up (from developers) and down (from leader)


      

    • 
The maintainers must merge all that parallel work


      

    • 
This is fondly known as "merge hell"


    

    

  • 
The more maintainers there are the worse this gets


    

    • 
Merging is O(n) with diff&patch or CVS/SVN/etc.


    

    

  • 
Conclusion


    

    • 
The flat structure has less merging but doesn't scale


      

    • 
The layered structure causes more merging so it doesn't scale either










 
 








Slide 15 of 33



13 Feb 2005 lm@bitmover.com