event-line Service Reliability, 2024
now 2024-09-15 Today teal

tag Event as e
  Outage red
  Recovery green
  Change blue

2024-01-18 Database failover  e: Outage
  A primary node lost its lease during a routine patch. **41 minutes** of
  write errors before the standby took over.

2024-02-02 Automatic failover shipped  e: Change
  The standby now promotes itself; no human in the path.

2024-04-11 Cache stampede  e: Outage
  An expired key let every request through to the database at once.

2024-05-30 Request coalescing  e: Change
  One fetch per key, the rest wait on it.

2024-08-22 Four months clean  e: Recovery
  The longest run without a customer-visible incident.