Distributed Job Scheduler cron + ad-hoc · 10K exec/s sustained, 25K peak · retries with backoff · 1-year history
arrows 0/18cards 10letters A–I
happy-path side-effect failure-comp new-infra (none)
BOTE — canonical numbers (every N- chip in the rail links here)
Failure playbook (A–I)
What breaks first · interview framing