Design Google Maps

Design a mapping service like Google Maps

• Real-Time Traffic Information: The service should provide real-time traffic information and adjust routes based on traffic conditions.
• Route Planning: Given a starting point and a destination, the service should be able to calculate the shortest or fastest route.

• 1B Daily Active Users
• Read:write ratio = 100: 1
• Data retention for 5 years
• Assuming an average usage of 30 minutes per user per day, with a read request made every 5 seconds
• Assuming each entry is about 1KB