What Happens When You Type en.wikipedia.org?
Talkat SREcon19 Europe/Middle East/Africa · on Thursday, 2019-10-03· at 11:45· Track 1: The Liffey B·
summary
A concrete walkthrough of Wikipedia’s stack: MediaWiki on PHP 7.2 with four cache layers feeding Varnish/NGINX at the edge, migrating to ATS and Kubernetes with Helm for deployments, Swift for object storage and 1,300 bare-metal servers across multiple sites. MariaDB/MariaDB shards (about 150 database servers, ~350k qps, ~70 TB RAM) back the parser cache, Kafka drives cache invalidation and jobs, and a distributed lock called poolcounters mitigates “celebrity death” cache storms.
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chapters (10)
- 0:00Introduction
- 4:03Application Layer
- 6:15Caching
- 9:07SOA
- 12:50Copernicus
- 15:07Message Queue
- 17:15Database
- 24:39Lets Encrypt
- 28:20DevOps
- 32:01Questions
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