System requirements

1. **URL Shortening:**

- The system should provide a mechanism to shorten long URLs.

- Shortened URLs should be unique and not collide with existing ones.

2. **Redirection:**

- When users access a shortened URL, they should be redirected to the original long URL.

- The redirection process should be fast and seamless.

3. **Custom Alias:**

- Users should have the option to customize their short URLs with a chosen alias (if available).

- Alias should be unique across the system.

4. **Analytics:**

- The system should track analytics, including the number of clicks, geographic location of clicks, and time of access.

- Provide a dashboard or API for users to access these analytics.

5. **Expiration:**

- Provide an option for users to set an expiration date for their short URLs.

6. **API:**

- Offer a RESTful API to allow integration with other services and applications.

- API should support URL shortening, retrieval, and analytics retrieval.

7. **Security:**

- Implement security measures to prevent misuse and unauthorized access to short URLs.

- Support HTTPS for secure data transmission.

1. **Scalability:**

- The system should handle a large number of URL shortening requests and clicks.

- Scalability should be achieved through horizontal scaling.

2. **Performance:**

- The redirection process should be fast, with minimal latency.

- Ensure that the system can handle concurrent access without performance degradation.

3. **Reliability:**

- The service should be highly available and have minimal downtime.

- Implement mechanisms for fault tolerance and disaster recovery.

4. **Storage:**

- Efficiently store and retrieve a large number of short URLs and their associated data.

- Use reliable and scalable storage solutions.

5. **Backup and Recovery:**

- Regularly backup data to prevent data loss.

- Implement a recovery process to restore data in case of failures.