→ P99 latency for Top-K and Rank queries must be < 50 ms.
→ Must sustain 10,000 score writes/second and 5,000 leaderboard reads/second per game on a single 4-core node (1M users/game).
→ No loss of score data if a node dies.
→ Recovery after node failure with full data integrity within ≤ 60 seconds.
→ Service process heap memory usage ≤ 512 MB per node.
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skills used
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