The document summarizes the evolution of LinkedIn's communication platform and network updates system from handling 0 to 23 million members. It describes how the initial communication platform was built on Java and used technologies like Tomcat, ActiveMQ, and Spring. It then discusses how the network updates system transitioned from a pull-based to push-based architecture to more efficiently distribute updates across the growing user base. Key challenges addressed in scaling the systems included partitioning data and services, optimizing database usage, and building for asynchronous flows and failure handling.

2. Learn how LinkedIn built and evolved scalable communication platform for the world’s largest professional network

4. Communication Platform – Quick Tour

5. Communication Platform – Quick Tour

10. Message Creation

11. Message Delivery

13. Communication Service – Scheduler

16. Network Updates Service – Iteration 1 API

20. Network Updates Service – Iteration 2 (Push)

21. Network Updates Service – Iteration 2 (Read)

25. JMX Interface – Cache Monitoring

26. JMX Interface – Network Updates Configuration