Neo Kim (@systemdesignone): "5/9: Scalability WhatsApp used diagonal scaling to keep the costs and operational complexity low. They ran WhatsApp servers on the FreeBSD operating system. They fine-tuned FreeBSD to accommodate 2 million+ connections per server."

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Neo Kim

Sep 13, 2023

The System Design Newsletter

5/9: Scalability

WhatsApp used diagonal scaling to keep the costs and operational complexity low.

They ran WhatsApp servers on the FreeBSD operating system.

They fine-tuned FreeBSD to accommodate 2 million+ connections per server.

Neo Kim

Sep 13, 2023

6/9 Flywheel Effect

They measured the metrics such as CPU, context switches, and system calls. Then identified and eliminated the bottlenecks. They did this at regular intervals.

substack.com/@systemdesignone/note/c-40006614

Sep 13, 2023

7:48 AM

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