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Shorten a given long URL and return the shortened URL.

{
  "shortUrl": "http://urlshort.ly/abcd"
}


Redirect to the original long URL using the shortened URL.

API Server

Isolated execution in a virtualized environment

Virtual Machine (VM)

Lightweight, isolated execution environments

Container (Docker)

Event-driven, auto-scaling code execution

Serverless Function

Code Execution Options

In-memory data structure store, using ZSET for leaderboard

Redis Sorted Set

NoSQL Database

Custom implementation using heap or similar structure

In-Memory Data Structure

Specialized database for time-based data (e.g., InfluxDB)

Time-Series Database

Leaderboard Implementation Options

Design a URL Shortener service like bit.ly

Properties

Unique ID Generation

Encoding IDs

Sharding

Database Considerations

Pre-Generating IDs

Client

Service

Database

URL Shortening

API Gateway

Request Handler

Caching Layer

URL Redirection

Analytics Service

In-Memory Database

Link Analytics

Availability

Latency

Durability

Security

Storage

Design URL Shortener | System Design Interview Question

Design URL Shortener

Non-Functional Requirements

API (optional)

Users should be able to input a long URL and receive a unique, shortened alias. The shortened URL should use a compact format with English letters and digits to save space and ensure uniqueness.


High Level Design

When users access a shortened URL, the service should redirect them seamlessly to the original URL with minimal delay.


The system should be able to track the number of times each shortened URL is accessed to provide insights into link usage.
