Horizontal Scaling of PHP Applications

To meet up with the high demands of businesses it is important to scale PHP Applications.

Horizontal scaling ensures you're always available, and is the only practical way of scaling large systems.

To achieve this a load balancer is used to route requests to multiple web servers and to ensure consistency distributed sessions and file storage services are key.

Transcript

1. Horizontal Scaling of PHP Applications By Adegoke Obasa adegokeobasa.me | @goke_epapa | https://ng.linkedin.com/in/adegokeobasa
2. About me • Software & DevOps Engineer @ • Former Software Engineer @
3. What is Scalability
4. Vertical Scaling (scale up/down) To add resources to (or remove resources from) a single node in a system.
5. Horizontal Scaling (scale out/in) To add more nodes to (or remove nodes from) a system.
6. Why does performance matter?
7. How fast is fast enough?
8. Why Horizontal Scaling? • Ensures you're always available. • It is the only practical way of scaling large systems. • Generally, it is the only way in the big league
9. Scaling PHP Applications beyond a single server
10. Load Balancing • HAProxy • Amazon Web Services (AWS) - Elastic Load Balancer (ELB) • Microsoft Azure - Load Balancer • Google Cloud - Load Balancer
11. Simple Architecture
12. Load Balancing Demo https://github.com/goke-epapa/lagos-php-meetup-demo
13. Start servers nodes 1st Instance: php -S 0.0.0.0:8080
14. Start servers nodes contd. 2nd Instance: php -S 0.0.0.0:8081
15. Start HAProxy haproxy -f haproxy.cfg Default port: 9000
16. Request hits localhost0
17. Request hits localhost1
18. Key Considerations
19. User session consistency Distributed Session Storage • Database • Redis • Memcached
20. Demo - User sessions with Redis session.save_handler = redis session.save_path = "tcp://127.0.0.1:6379"
21. Demo - User sessions with Redis
22. Demo - User sessions with Redis
23. Demo - User sessions with Redis
24. Sticky Sessions?
25. User file consistency 25 22 Distributed File Services • Amazon Web Services (AWS) Simple Storage Service (s3) • Google Cloud File Storage Also • Object Storage
26. PHP Success Stories NB: All views expressed about the companies listed are just my opinions.
27. Q & A
28. Resources • Bondi, André B. (2000). Characteristics of scalability and their impact on performance. Proceedings of the second international workshop on Software and performance - WOSP '00. p. 195. • http://www.slideshare.net/LucasArruda3/inter-con-phpscalingphp?qid=4422d631-e3cd-4d8c-be74- 25c9167e491a&v=&b=&from_search=6 • https://www.digitalocean.com/community/tutorials/how-to-set-up-a-redis-server-as-a-session-handler- for-php-on-ubuntu-14-04 • http://bits.ng/2012/06/jobberman-cto-taiwo-orilogbon-on-how-to-scale-your-startup/ • https://www.digitalocean.com/company/blog/horizontally-scaling-php-applications/ • https://en.wikipedia.org/wiki/Object_storage • https://blogs.oracle.com/WebScale/entry/scaling_wikipedia_with_lamp_7
29. Thank You @goke_epapa