Paris hackers Meetup #12 - How to handle large audience

3. References Performances © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com Record of January 2015 56 000request / seconde on one customer 157Millions visits 28 millions visits 46 Millions visits 42 Millions visits 41 Millions visits

7. 1. Continuous improvement 2. Caching 3. Technical zoom on Varnish Efficiency

8. Continuous improvement Definition of the KPI PERFORMANCE MEASUREMENT & MONITORING Business indicators WEBSITE CAPACITY KPI © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com – Maximum response time – Capacity of the website without UX degradation – Capacity of the increase load (ex : 1000 connexions in 5 minutes) – Response time on the increase load – Tracking this KPI in short and long term

9. Continuous improvement Detect the improvement leverages © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com Application Define references values with load tests 0 Infrastructure

13. Improve response time Ressources protections APC Memcached Query Cache 10 %100 % 90 % 1st rampart 2nd rampart 3rd rampart 4th rampart Curious ContributorsReader Trolls © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com

14. Benefits Huge leverage Improve the response time Improve the UX Multiply your website capacity Reduce time of processing x 100 / Y © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com

16. Increase your website capacity Scalable architecture Application Front applicationFront Cache Application cache Backend Backoffice Application © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com

21. Mindset © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com Il semble que la perfection soit atteinte non quand il n'y a plus rien à ajouter, mais quand il n'y a plus rien à retrancher. Antoine de Saint Exupéry « « It seems that perfection is attained not when there is nothing more to add, but when there is nothing more to remove. antoine-st-exupery.eng.srt

22. Under the server : ressources protection Network Architecture © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com NoTrack / RAW VLAN / DMZ VLAN VLAN Cache Front Back Load Balancer Firewall L3/L4 Load Balancer Firewall L7

26. On the server Kernel Config © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com • Init congestion Window TCP (initcwnd) • Network Interface Queuing / RPS • Sysctl IP/TCP • Syn Proxy

27. On server application Varnish tuning © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com  Boost the ressources (FD, threads, buffers)  Monitoring your miss/hit rate very carefully DevOps needed !  Dominos effect (www-0x)

28. Continuous improvement Infrastructure KPI © 2015 - Oxalide - Conseil | Infogérance | Hébergement - 01.75.77.16.66 - http://www.oxalide.com Memory usageCPU Load Consumption bandwidth Usage of the middleware

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