All chapters Chapter 12

Design A Chat System

10 references

Reference 1 in Chapter 12: Erlang at Facebook

erlang-factory.com PDF
Reference 2 in Chapter 12: Messenger and WhatsApp process 60 billion messages a day

theverge.com
Reference 3 in Chapter 12: Long tail

en.wikipedia.org
Reference 4 in Chapter 12: The Underlying Technology of Messages

facebook.com
Reference 5 in Chapter 12: How Discord Stores Billions of Messages

blog.discordapp.com
Reference 6 in Chapter 12: Announcing Snowflake

blog.twitter.com
Reference 7 in Chapter 12: Apache ZooKeeper

zookeeper.apache.org
Reference 8 in Chapter 12: From nothing: the evolution of WeChat background system (Article in Chinese)

infoq.cn
Reference 9 in Chapter 12: End-to-end encryption

faq.whatsapp.com
Reference 10 in Chapter 12: Flannel: An Application-Level Edge Cache to Make Slack Scale

slack.engineering