3 · COMPARISON · UNAVAILABILITY Unavailable ≠ Lost CACHE Unavailable: PostgreSQL timed out and reached its load limit. Lost: Re-populating the data. Degradation player:*:profile DERIVATIVE Unavailable: We're reporting a delay. Lost: Recalculation based on matches, followed by a catch-up. Delay leaderboard:* STATUS Unavailable: fail closed, 503. Lost: re-entry, new request. Loss session:*, matchmaking:* Sessions: fail closed. If a session cannot be verified, the secured request is not allowed to pass "temporarily without verification." In the Redis lab, there is no RDB/AOF, and data is lost upon restart. AOF everysec may lose the most recent records in the event of a crash and does not replace a backup. ▶ P15: Outbox