System design multi tenant
Shared vs silo isolation
Noisy neighbor, data isolation, and when a dedicated stamp is worth it.
Week 5Tuesday 6 OctoberMulti-tenancy
Day 32: Multi-tenant and identity
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System design identity
AuthN / AuthZ, tokens, sessions
JWT vs opaque session. Revocation. Service-to-service vs user tokens.
Estimation
Token validation at 200k rps
CPU for JWT verify, cache of JWKS, and session-store QPS if opaque.
Behavioral star
STAR — ambiguous requirements
You drove the call. What you timeboxed, what you cut, who you aligned.