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Marco Cecconi
@sklivvz
http://sklivvz.com
ARCHITETTURA?
CHE E’?
Oratorio
Quasi 150 siti
~40º network più visitato al mondo
650!
Altro “server pr0n” qui
http://imgur.com/a/X1HoY
http://stackexchange.com/performance
Agile	
  
BAT!CAVERNA
Ciclo scrivi-compila-testa
sul computer di casa
Richieste feature
DEV.SO
Test su server di produzione
git push
BAT!CAVERNA
BAT!CAVE DEV.SO
META.SE
Utenti testano su
meta.stackexchange.com
(“baking”)
git push
BAT!CAVERNA
1-click deploy
DEV.SO
META.SE
AZZ!
git revert
git push
BAT!CAVERNA
1-click deploy
DEV.SO
NETWORK META.SE
1-click deploy
git push
1-click
deploy
In produzione!
Tonnellate di utenti lo usano…
BAT!CAVERNA
BAT!CAVE DEV.SO
NETWORK META.SE
1-click deploy
git push
1-click
deploy
…e richiedono
nuove feature!
BAT!CAVERNA
Vai	
  veloce	
  e	
  scassa	
  le	
  cose*	
  
* Non la home page o pagine domande :-)
Vai	
  veloce	
  e	
  scassa	
  le	
  cose*	
  
* Non la home page o pagine domande :-)
Abuso	
  dell’uso	
  della	
  cache	
  
Il	
  nostro	
  amico/nemico:	
  
Il	
  Garbage	
  Collector	
  
Abusiamo della cache per aiutare il GC
Abusiamo del compilatore per aiutare il GC
IRepository<Order>	
  orderRepository	
  =	
  	
  
	
  	
  	
  	
  container.Resolve<IRepository<Order>>();	
  
	
  
Order...
IRepository<Order>	
  repository	
  =	
  
	
  	
  new	
  ValidatingOrderRepository	
  (	
  
	
  	
  	
  	
  new	
  Securit...
Il	
  nostro	
  sorgente	
  
YAGNI*	
  
* You Ain’t Gonna Need It!
Librerie	
  e	
  open	
  source	
  
Create	
  librerie	
  di	
  codice	
  
Rilasciatele	
  in	
  Open	
  Source	
  
PROGRAMMAZIONE DA
“SUPEREROI”
LIVELLO STRUMENTI:
HATTORI HANZŌ
• 	
  	
  La	
  performance	
  è	
  una	
  feature	
  
• 	
  	
  Always.	
  Be.	
  Shipping.	
  
• 	
  	
  Usate	
  le	
  ...
Marco Cecconi
@sklivvz
http://sklivvz.com
Stiamo assumendo 10 nuovi sviluppatori da ovunque nel mondo!
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015
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Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015

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Codemotion Roma 2015 - Stack Exchange è uno dei 50 maggiori network al mondo ed è sviluppato con l'obiettivo di essere il sito più veloce in assoluto. Nel talk racconto: * L'architettura fisica di Stack Overflow. Quanti server abbiamo? A cosa servono e cosa sono le loro spec? * L'architettura logica del software. Come scaliamo? Quali sono i pezzi principali dell'applicazione? * Il sistema di tool. Cosa usiamo per sostenere la nostra filosofia di "extreme optimization"? * Il team di sviluppo. Quali sono i nostri valori fondamentali? Che impronta volgiamo lasciare come sviluppatori?

Publié dans : Ingénierie
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Stack Overflow - It's All About Performance - Marco Cecconi - Codemotion Roma 2015

  1. 1. Marco Cecconi @sklivvz http://sklivvz.com
  2. 2. ARCHITETTURA? CHE E’?
  3. 3. Oratorio
  4. 4. Quasi 150 siti ~40º network più visitato al mondo
  5. 5. 650!
  6. 6. Altro “server pr0n” qui http://imgur.com/a/X1HoY
  7. 7. http://stackexchange.com/performance
  8. 8. Agile  
  9. 9. BAT!CAVERNA Ciclo scrivi-compila-testa sul computer di casa Richieste feature
  10. 10. DEV.SO Test su server di produzione git push BAT!CAVERNA
  11. 11. BAT!CAVE DEV.SO META.SE Utenti testano su meta.stackexchange.com (“baking”) git push BAT!CAVERNA 1-click deploy
  12. 12. DEV.SO META.SE AZZ! git revert git push BAT!CAVERNA 1-click deploy
  13. 13. DEV.SO NETWORK META.SE 1-click deploy git push 1-click deploy In produzione! Tonnellate di utenti lo usano… BAT!CAVERNA
  14. 14. BAT!CAVE DEV.SO NETWORK META.SE 1-click deploy git push 1-click deploy …e richiedono nuove feature! BAT!CAVERNA
  15. 15. Vai  veloce  e  scassa  le  cose*   * Non la home page o pagine domande :-)
  16. 16. Vai  veloce  e  scassa  le  cose*   * Non la home page o pagine domande :-)
  17. 17. Abuso  dell’uso  della  cache  
  18. 18. Il  nostro  amico/nemico:   Il  Garbage  Collector  
  19. 19. Abusiamo della cache per aiutare il GC
  20. 20. Abusiamo del compilatore per aiutare il GC
  21. 21. IRepository<Order>  orderRepository  =            container.Resolve<IRepository<Order>>();     Order  order  =  orderRepository.Get(35); La buona, vecchia dependency injection
  22. 22. IRepository<Order>  repository  =      new  ValidatingOrderRepository  (          new  SecurityRepository<Order>  (              new  LoggingRepository<Order>  (                  new  CachingRepository<Order>  (                      new  NHibernateRepository<Order>  ()                  )              )          )      );         Order  order  =  repository.Get(35);
  23. 23. Il  nostro  sorgente  
  24. 24. YAGNI*   * You Ain’t Gonna Need It!
  25. 25. Librerie  e  open  source  
  26. 26. Create  librerie  di  codice   Rilasciatele  in  Open  Source  
  27. 27. PROGRAMMAZIONE DA “SUPEREROI”
  28. 28. LIVELLO STRUMENTI: HATTORI HANZŌ
  29. 29. •     La  performance  è  una  feature   •     Always.  Be.  Shipping.   •     Usate  le  vostre  circostanze.   •     Rilasciate  O/S  le  vostre  librerie   •     3  monitor  grandi  da  far  schifo*.   *  I  miei  3  monitor  da  30”  non  fanno  schifo     MORALE DELLA FAVOLA
  30. 30. Marco Cecconi @sklivvz http://sklivvz.com Stiamo assumendo 10 nuovi sviluppatori da ovunque nel mondo!

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