T3DD12 Caching with Varnish
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This document discusses using Varnish as a reverse proxy and caching solution for websites built with TYPO3. It provides an overview of Varnish, how to install and configure it, benchmarks showing significant speed improvements when using Varnish cache, and tips for tuning and purging the cache. The presentation encourages using Varnish to accelerate websites and discusses tools for monitoring and debugging Varnish performance.
![Sending correct headers
• config.sendCacheHeaders = 1
• The conditions for allowing client caching are:
– page was cached
– No *_INT or *_EXT objects were on the page (eg.
USER_INT)
– No frontend user is logged in
– No backend user is logged in
• If these conditions are met, the headers sent are:
– Last-Modified [SYS_LASTCHANGED of page id]
– Expires [expire time of page cache]
– Etag [md5 of content]
– Cache-Control: max-age: [seconds til expiretime]
– Pragma: public](https://image.slidesharecdn.com/t3dd12-varnish-120416071825-phpapp01/85/T3DD12-Caching-with-Varnish-24-320.jpg)
T3DD12 Caching with Varnish
- 1. Make your website fly using Varnish Fabrizio Branca T3DD12
- 2. Fabrizio Branca System Developer AOE media Wiesbaden TYPO3 & Magento Twitter: @fbrnc Blog: http://www.fabrizio-branca.de
- 3. You?! • Who has any experience with Varnish? • Who has a production site using Varnish? • Who has played around with Varnish? • Who has experience with any other reverse proxy solution?
- 4. 1m visitors in 24h 5000 concurrent users
- 6. Reverse proxy caching Request Browser TYPO3 (Apache + PHP + Mysql) Response
- 7. Reverse proxy caching Browser Varnish TYPO3 (Apache + PHP + Mysql)
- 8. Reverse proxy caching Browser Nginx Varnish TYPO3 (Apache + PHP + Mysql) - SSL termination - (Compression)
- 9. Reverse proxy caching Browser Nginx Varnish TYPO3 (Apache + PHP + Mysql)
- 10. Varnish HTTP Caching Load Failover Accelerator Reverse Proxy Balancer system „Varnish makes websites fly“
- 11. Varnish • Created by Poul-Henning Kamp • Varnish Configuration Language (VCL) – DSL, will be translated into C code and compiled • Varnish uses thread and memory management of the operation system • Additional tools: varnishtop, varnishlog,… • Online-Documentation: http://www.varnish-cache.org/docs/2.1/
- 12. Stability
- 13. Efficiency
- 14. CPU load
- 15. Speed
- 16. Installation • In Ubuntu: sudo apt-get install varnish sudo vi /etc/default/varnish START=yes sudo /etc/init.d varnish start • Will be started automatically on boot • Listens to port 6081 by default • Uses 127.0.0.1:8080 as a backend by default • /etc/varnish/default.vcl
- 17. Setup Amazon ELB Load F5 Balancer Varnish Varnish Varnish TYPO3 frontends TYPO3 backend
- 18. Nginx, Varnish, Apache setup
- 19. Request Lifecycle (simplified) Complete workflow: http://www.varnish-cache.org/trac/wiki/VCLExampleDefault
- 20. Pitfalls • Vary: User-Agent (also implicitly set e.g. SetEnvIf)
- 22. Restart / Reload • Restart: Flushes complete cache • Reload: Reads VCL without flushing cache
- 23. 855,78 Pages/Second Benchmarks 3,45 10,72 Pages/Second Pages/Second TYPO3 TYPO3 TYPO3 without cache with cache with Varnish
- 24. Sending correct headers • config.sendCacheHeaders = 1 • The conditions for allowing client caching are: – page was cached – No *_INT or *_EXT objects were on the page (eg. USER_INT) – No frontend user is logged in – No backend user is logged in • If these conditions are met, the headers sent are: – Last-Modified [SYS_LASTCHANGED of page id] – Expires [expire time of page cache] – Etag [md5 of content] – Cache-Control: max-age: [seconds til expiretime] – Pragma: public
- 26. Purging • http://forge.typo3.org/projects/show/extens ion-purge • Configuration in VCL • Access protect • Purge using Shift+Reload
- 27. Punching Holes… http://www.flickr.com/photos/stevendepolo/3053981107/lightbox/
- 28. Punching holes Cookie / ESI AJAX Client storage
- 29. Tuning • Different lifetimes for clients and Varnish • Cache status codes > 400 • Redirects • Protect the backend!
- 30. Further reading • Varnish (inkl. Dokumentation) http://www.varnish-cache.org • Poul-Henning Kamp at T3CON10 http://vimeo.com/16676188 • http://forge.typo3.org/projects/show/extension- moc_varnish • http://www.fabrizio-branca.de/varnish.html • http://www.fabrizio-branca.de • https://github.com/fbrnc
- 31. Questions? Mail: fabrizio.branca@aoemedia.de Twitter: @fbrnc Blog: http://www.fabrizio-branca.de