Zend Cache - Evolution

В докладе я расскажу о своем опыте оптимизации “тяжелых” e-commerce проектов написанных на платформе Magento. В ходе доклада мы рассмотрим, практики и стратегии кэширования такие как:
— Точечное кэширование
— “Клонирование” приложения и генерация статического контента
— Кэширование вместо оптимизации
— Автоматическая генерация кэшей и др.
Немного остановимся на рассмотрении TwoLevels Cache в Zend 1 и математических моделях кэширования (LRU, LFU, LRU2, MRU).
Попробуем подобрать адекватное хранилище для кеша. Посмотрим чем нам может помочь cобытийно-ориентированная архитектура поддерживать валидность кэша.
И сравним Zend\Cache 2.0 с Zend_Cache 1.0.

Transcript

1. Zend Cache - Evolution Владимир Дубина
2. За кадром 5 years PHP, 2 years Team Lead
3. Optimization: general patterns Make it Work Make it Right Make it Fast Kent Beck
4. Optimization: general patterns Make it Work Make it Right Small Make it Fast
5. Optimization: general patterns Make it Work Make it Right Make it Fast Kent Beck
6. Optimization: general patterns Make it Work Make it Right Make it Fast
7. Optimization: general patterns Make it Work Make it Fast
8. Optimization: general patterns Make it Work Make it Fast Fast
9. Optimization: general patterns Make it Fast Fast
10. Proxy, HTTP cache, Web cache
11. Static site generator
12. Practical cache: my experience • Home page (8) < 1 sec • Product page (18) < 3 sec • Category page (15 - 45) < 4 sec
13. Practical cache: my experience • Home page (8) < 1 sec • Product page (18) < 3 sec • Category page (15 - 45) < 4 sec • No docs, support, time
14. Optimization: framework
15. Practical cache: Find • Zend_Log • Profiler Core_Debug • Magento Profiler • Xdebug Profiler • New Relic
16. Practical cache: Find: Xdebug Profiler • Use xdebug.profiler_enable_trigger • Use xdebug.profiler_output_dir
17. Practical cache: Find: New Relic
18. Optimization: framework EPIC FAIL
19. Practical cache: my experience • Magical numbers • Spaghetti code • Dead code • Duplicated code • Much more: http://www.codinghorror.com/
20. Practical cache: Measure code • Phpcs • Phpcpd • Phpmd • Pdepend
21. Practical cache: Measure with Sonar
22. Practical cache: Cache strategies Bélády's Algorithm Most Recently Used Least Recently Used Least Frequently Used Adaptive Replacement Cache => LRU/LFU
23. Practical cache: Research Home page (8) < 1 sec • Most viewed • Has dynamic content • Login area • Hot sells
24. Practical cache: Research Home page (8) < 1 sec • Most viewed • Has dynamic content • Login area – not important • Hot sells – changes not often
25. Practical cache: Zend Cache 1.0 Frontends Page cache Quick FPC Uses PHP Output (Capture) Blocks/Pages just cool
26. Practical cache: Zend Cache 1.0: Output if (!($cache->start('UniqID'))) { Mage::run($mageRunCode, $mageRunType); $cache->end(); } else { $cache->end(); } 110 ms -> 20 ms
27. Practical cache: Zend Cache 1.0 Backends File easy/cheap slow Memcache quick/independent flat data Database slow/independent expensive
28. Practical cache: Research Product page (18) < 3 sec • Frequently viewed • Has dynamic content • Should be quick even for the first visitor
29. Practical cache: Research Product page (18) < 3 sec • Frequently viewed • Cache blocks and parts of code • Has dynamic content • Validate on each change (EOA) • Should be quick even for the first visitor • Generate cache on our side
30. Practical cache: Event Oriented Architecture
31. Practical cache: Research Category page (15 - 45) < 4 sec • Frequently viewed • Has dynamic content • Should be quick • Has high variety
32. Practical cache: Research
33. Practical cache: Research Category page (15 - 45) < 4 sec • Frequently viewed • Cache blocks and parts of code • Has dynamic content • Validate on each change (EOA) • Has high variety • Cache collections
34. Practical cache: Advices • Always Measure
35. Practical cache: Advices • Always Measure • Do not cache only because You can
36. Practical cache: Advices • Always Measure • Do not cache only because You can • Use Tags + Events for CRUD operations
37. Practical cache: Advices • Always Measure • Do not cache only because You can • Use Tags + Events for CRUD operations • Generate cache by yourself if possible
38. Practical cache: Advices • Always Measure • Do not cache only because You can • Use Tags + Events for CRUD operations • Generate cache by yourself if possible • Helpers sometimes don’t help
39. Practical cache: Advices • Always Measure • Do not cache only because You can • Use Tags + Events for CRUD operations • Generate cache by yourself if possible • Helpers sometimes don’t help • File storage is slow on many files
40. Practical cache: Advices • Always Research Background
41. Zend Cache 1.0: TwoLevels Cache Response Request Slow Storage Fast Storage isCacheExists
42. Zend Cache 1.0: TwoLevels Cache Response Request Slow Storage Fast Storage isCacheExists checkPriority Priority: 1-10 Depends on % of free space in the Fast Storage
43. Zend Cache 1.0: TwoLevels Cache Priority: 1-10 Depends on % of free space in the Fast Storage Calculate priorities LRU/LFU
44. Zend_Cache 2.0: Composer package
45. Zend_Cache 2.0: in progress… Спасибо Вопросы