Systems
A high-throughput lookup system under a 5 ms timeout
Eleven chapters follow the request path end to end, each stating what is in place and why against five architectural drivers.
WorkshopLocal rate limiter
A global rate limit enforced as an in-memory share on each replica, so the request path stays local and the cap is as fresh as the watched count.
WorkshopThe compiled read model
Data assembled ahead of the request and served from memory, so latency is decided by the lookup and read capacity scales by process count alone.