Jeff Rigby on Scaling Drupal in the Enterprise


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Presentation by Jeff Rigby held Thursday, October 29th, 2009 at DPCI Seminar on Drupal in the Enterprise

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Jeff Rigby on Scaling Drupal in the Enterprise

  1. 1. Drupal for the Enterprise Seminar by DPCI featuring Dries Buytaert Michael Mainiero, and Jeff Rigby Thursday, October 29, 2009 © 2009 DPCI. All Rights Reserved.
  2. 2. Drupal for the Enterprise Presented by Jeff Rigby Web Application Architect, DPCI Thursday, October 29th, 2009 © 2009 DPCI. All Rights Reserved.
  3. 3. Goals of this Presentation Describe how to scale Drupal from an out-of-box build to an enterprise level solution Explain some of the approaches DPCI has used with our clients to meet their scaling needs ©2009 DPCI. All Rights Reserved.
  4. 4. Scaling Drupal Anonymous is easy to scale — Mirror servers — Reverse-Proxy caches — Drupal only manages the content Authenticated traffic is more difficult — Each dynamic page must be processed by PHP — Requires more horsepower ©2009 DPCI. All Rights Reserved.
  5. 5. Built In Options Configuration — Drupal page/block cache — Page compression — Aggregate JS/CSS Coding — Drupal cache (use it!) — Use static variables when possible Immediately usable with no additional modules ©2009 DPCI. All Rights Reserved.
  6. 6. Built In Options Results 4.8 Auth 4.8 Optimized 96.5 OOB Anon 5.8 0 20 40 60 80 100 120 Requests Per Second ©2009 DPCI. All Rights Reserved.
  7. 7. Quick Optimizations Boost Memcached Opcode Cache ©2009 DPCI. All Rights Reserved.
  8. 8. Boost Amazing performance gain Anonymous users only Serves static files No additional software or hardware needed ©2009 DPCI. All Rights Reserved.
  9. 9. Memcached Easy to install on the server Minor module configuration Removes the cache from the database Optionally removes session tracking from the database Significantly reduces MySQL statements ©2009 DPCI. All Rights Reserved.
  10. 10. Opcode Cache — A few out there (APC, Zend Optimizer, XCache, eAccelerator) — Easy to install — Pre-compiles PHP in memory — Reduces server load ©2009 DPCI. All Rights Reserved.
  11. 11. Combined Results 15.1 Auth 4.8 Optimized 427 OOB Anon 5.8 0 100 200 300 400 500 Request Per Second ©2009 DPCI. All Rights Reserved.
  12. 12. MySQL Tweaks Tune your MySQL configuration to your server. MySQL Tuner is very useful: Enable the query cache! Enable the slow query log to spot problem queries ©2009 DPCI. All Rights Reserved.
  13. 13. Apache SOLR Module provides drop-in replacement for search Gets search out of Drupal Avoids expensive node_load() calls Available as a hosted solution from Acquia ©2009 DPCI. All Rights Reserved.
  14. 14. Reverse-Proxy Cache Squid or Varnish Run on the same server or clustered on multiple external servers Can reduce web server traffic by 90%+ if serving the entire site (anonymous traffic) For dynamic sites, offload all static files (JS, CSS, images, etc.) and let Apache focus on PHP Low overhead Tip: Override the expires header ( — Expires: Sun, 19 Nov 1978 05:00:00 GMT ©2009 DPCI. All Rights Reserved.
  15. 15. Reverse-Proxy Cache ©2009 DPCI. All Rights Reserved.
  16. 16. Use a CDN Many options out there: Akamai, Amazon, CacheFly Generally easy to setup Off-load entire site or only static files (JS, CSS, images, etc.) Can be expensive ©2009 DPCI. All Rights Reserved.
  17. 17. Static Page Tips Javascript! Store dynamic values in a cookie Use AJAX to load small portions of dynamic content Use Javascript to replace dates with natural language “About 4 Minutes Ago” ©2009 DPCI. All Rights Reserved.
  18. 18. Load Balanced Web Servers Use rsync to keep Web servers synched or NFS web root Advanced load balancers can handle server failures Easy to add or remove servers with no site downtime Run server intensive tasks (cron, data import, etc.) on an internal server to avoid site slow downs ©2009 DPCI. All Rights Reserved.
  19. 19. Multiple MySQL Databases Master / Slave Setup — Minimum of 2 servers — Drupal 5 and 6 require minor core hacks — Built into Drupal 7! — Be mindful of database lag — Reliant on master database Use Memcached to share the query cache across all servers Clustering and distributed configurations ©2009 DPCI. All Rights Reserved.
  20. 20. Sample Large Scale Site ©2009 DPCI. All Rights Reserved.
  21. 21. Scaling Drupal Questions? Jeff’ s Blog: ©2009 DPCI. All Rights Reserved.