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Design a ride-sharing platform (Uber) with real-time driver location tracking.
Driver location: Redis Geospatial GEOADD drivers:{city} lon lat driverId every 4s Nearby drivers: GEORADIUS drivers:{city} lon lat 5 km with driver status Trip data: MongoDB for trip documents (flexible schema for different trip types) Real-time matching: Redis Pub/Sub for driver offer notifications Surge pricing: Redis Sorted Set tracking requests per geohash cell Driver availability: Redis Hash
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